August 26 to September 8, 2012 (Weeks 35 & 36)
Posted 2012-09-14For readers interested in the <ABBR title="Portable Document Format">PDF</ABBR> version, the document is available for downloading or viewing:
<A title="Flu Watch (Version PDF, 113 KB - 6 pages)" href="http://www.phac-aspc.gc.ca/fluwatch/12-13/w36_12/pdf/fw2012-36-eng.pdf">2011-2012 FluWatch: August 26 to September 8, 2012 (Weeks 35 & 36) (<ABBR title="Portable Document Format">PDF</ABBR> Version - 113 <ABBR title=Kilobytes>KB</ABBR> - 6 pages)
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Overall Influenza Summary
Influenza Activity (geographic spread) and Outbreaks
In week 35, 2 regions (within BC & ON) reported sporadic activity while the rest reported no activity. In week 36, 1 region (within MB) reported localized activity, 2 regions (within ON & QC) reported sporadic activity and the rest reported no activity (see Figure 1). Note that no data was received from AB, SK, NS, PEI and YT for week 35 and no data was received from SK, PEI, NL and YT for week 36. One new outbreak was reported in week 36 in a long-term care facility (Figure 3) in MB and was due to influenza A/H3.
Figure 1. Map of overall Influenza activity level by province and territory,
Canada, Week 36
Note: Influenza activity levels, as represented on this map, are assigned and reported by Provincial and Territorial Ministries of Health, based on laboratory confirmations, sentinel ILI rates (see graphs and tables) and reported outbreaks. Please refer to detailed definitions on the last page. For areas where no data is reported, late reports from these provinces and territories will appear on the FluWatch website.
Text equivalent for figure 1Map of overall Influenza activity level by province and territory, Canada
Figure 2. Number of influenza surveillance regions<SUP title="sub-regions within the province or territory as defined by the provincial/territorial epidemiologist. Graph may change as late returns come in">?</SUP> reporting widespread or localized influenza activity, Canada, by report week, 2012-2013 (N=56)
? sub-regions within the province or territory as defined by the provincial/territorial epidemiologist. Graph may change as late returns come in.
Text equivalent for figure 2Number of influenza surveillance regions reporting widespread or localized influenza activity, Canada, by report week, 2011-2012 (N=56)
Figure 3. Overall Number of Influenza Outbreaks, Canada, by Report Week, 2012-2013
Text equivalent for figure 3Overall Number of Influenza Outbreaks, Canada, by Report Week, 2011-2012
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Influenza and Other Respiratory Virus Detections
The proportion of positive influenza tests increased slightly from two weeks ago (when the percent positive was 0.2%) and was 0.9% in week 35 and 0.6% in week 36 (Figure 4 & 5). The proportion of positive detections for influenza A (0.8% in week 35 and 0.4% in week 36) was slightly higher than the proportion positive for influenza B detections (0.1% and 0.2% respectively). Over the two week period, influenza A detections were reported in BC, AB, MB, ON, QC & NL while influenza B detections were reported in AB, SK & QC.
Cumulative to date of influenza virus detections by type/subtype is as follows: 82.4% influenza A (50.0% - A(H3) and 50.0% - unsubtyped) and 17.6% influenza B (Table 1).
Detailed information on age and type/subtype of the positive influenza cases to date will be presented once more information becomes available (Table 2).
The percentage positive for rhinovirus detections was similar to previous weeks (18.0% & 23.1% in weeks 35 & 36 respectively) and remains the highest compared to the other respiratory viruses. The percentage positive for parainfluenza viruses continued to decline and was 1.7% in week 36. The percentage positive for the other respiratory viruses in week 36 remained low: RSV-.7%; adenovirus-1.1%; hMPV-0.8%; and coronavirus-0.7% (Figure 5). For more details, see the weekly Respiratory Virus Detections in Canada Report.
<TABLE class=widthFull border=1 cellSpacing=0 cellPadding=2><CAPTION class=alignCenter>Table 1: Weekly & Cumulative numbers of positive influenza specimens
by Provincial Laboratories, Canada, 2012-2013
</CAPTION><THEAD><TR class=bg-colour-yellow><TH id=ar1 rowSpan=3>Reporting provinces</TH><TH id=ac1 colSpan=6>Weekly
(August 26 to September 8, 2012)
</TH><TH id=ac9 colSpan=6>Cumulative
(August 28, 2012 to September 8, 2012)
</TH></TR><TR class=bg-colour-yellow><TH id=ac2 colSpan=5 headers=ac1>Influenza A</TH><TH id=ac8 headers=ac1>Influenza
B
</TH><TH id=ac10 colSpan=5 headers=ac9>Influenza A</TH><TH id=ac16 headers=ac9>Influenza
B
</TH></TR><TR class=bg-colour-yellow><TH id=ac3 headers=ac2>A Total</TH><TH id=ac4 headers=ac2>A(H1)</TH><TH id=ac5 headers=ac2>A(H3)</TH><TH id=ac6 headers=ac2>Pand H1N1</TH><TH id=ac7 class=noWrap headers=ac2>A
( <ABBR title=unsubtyped>Un S</ABBR>)Table 1 note*
</TH><TH headers="ac1 ac8">Total</TH><TH id=ac11 headers=ac10>A Total</TH><TH id=ac12 headers=ac10>A(H1)</TH><TH id=ac13 headers=ac10>A(H3)</TH><TH id=ac14 headers=ac10>Pand H1N1</TH><TH id=ac15 class=noWrap headers=ac10>A
(Un S) Table 1 note*
</TH><TH headers=ac16>Total</TH></TR></THEAD><TFOOT><TR><TD class=fontSize85 colSpan=13>* Unsubtyped: The specimen was typed as influenza A, but no test for subtyping was performed. Specimens from NT, YT, and NU are sent to reference laboratories in other provinces. Note: Weekly data is based on week of positive lab detection. Cumulative data includes updates to previous weeks; due to reporting delays, the sum of weekly report totals do not add up to cumulative totals.</TD></TR></TFOOT><TBODY><TR><TH id=ar2 class=bg-colour-yellow headers=ar1><ABBR title="British Columbia ">BC</ABBR></TH><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac3">2</TD><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac5">1</TD><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac7">1</TD><TD class=alignCenter headers="ar1 ar2 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac10 ac11">2</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac10 ac13">1</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac10 ac15">1</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac16">0</TD></TR><TR><TH id=ar3 class=bg-colour-yellow headers=ar1><ABBR title=Alberta>AB</ABBR></TH><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac3">2</TD><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac5">1</TD><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac7">1</TD><TD class=alignCenter headers="ar1 ar3 ac1 ac8">1</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac10 ac11">2</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac10 ac13">1</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac10 ac15">1</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac16">1</TD></TR><TR><TH id=ar4 class=bg-colour-yellow headers=ar1><ABBR title=Saskatchewan>SK</ABBR></TH><TD class=alignCenter headers="ar1 ar4 ac1 ac2 ac3">0</TD><TD class=alignCenter headers="ar1 ar4 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar4 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar4 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar4 ac1 ac2 ac7">0</TD><TD class=alignCenter headers="ar1 ar4 ac1 ac8">1</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac10 ac11">0</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac10 ac15">0</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac16">1</TD></TR><TR><TH id=ar5 class=bg-colour-yellow headers=ar1><ABBR title=Manitoba>MB</ABBR></TH><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac3">3</TD><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac5">3</TD><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac7">0</TD><TD class=alignCenter headers="ar1 ar5 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac10 ac11">3</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac10 ac13">3</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac10 ac15">0</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac16">0</TD></TR><TR><TH id=ar6 class=bg-colour-yellow headers=ar1><ABBR title=Ontario>ON</ABBR></TH><TD class=alignCenter headers="ar1 ar6 ac1 ac2 ac3">5</TD><TD class=alignCenter headers="ar1 ar6 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar6 ac1 ac2 ac5">2</TD><TD class=alignCenter headers="ar1 ar6 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar6 ac1 ac2 ac7">3</TD><TD class=alignCenter headers="ar1 ar6 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac10 ac11">5</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac10 ac13">2</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac10 ac15">3</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac16">0</TD></TR><TR><TH id=ar7 class=bg-colour-yellow headers=ar1><ABBR title=Quebec>QC</ABBR>
</TH><TD class=alignCenter headers="ar1 ar7 ac1 ac2 ac3">1</TD><TD class=alignCenter headers="ar1 ar7 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar7 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar7 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar7 ac1 ac2 ac7">1</TD><TD class=alignCenter headers="ar1 ar7 ac1 ac8">1</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac10 ac11">1</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac10 ac15">1</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac16">1</TD></TR><TR><TH id=ar8 class=bg-colour-yellow headers=ar1><ABBR title="New Brunswick">NB</ABBR>
</TH><TD class=alignCenter headers="ar1 ar8 ac1 ac2 ac3">0</TD><TD class=alignCenter headers="ar1 ar8 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar8 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar8 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar8 ac1 ac2 ac7">0</TD><TD class=alignCenter headers="ar1 ar8 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac10 ac11">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac10 ac15">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac16">0</TD></TR><TR><TH id=ar9 class=bg-colour-yellow headers=ar1><ABBR title="Nova Scotia ">NS</ABBR>
</TH><TD class=alignCenter headers="ar1 ar9 ac1 ac2 ac3">0</TD><TD class=alignCenter headers="ar1 ar9 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar9 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar9 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar9 ac1 ac2 ac7">0</TD><TD class=alignCenter headers="ar1 ar9 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac10 ac11">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac10 ac15">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac16">0</TD></TR><TR><TH id=ar10 class=bg-colour-yellow headers=ar1><ABBR title="Prince Edward Island ">PE</ABBR>
</TH><TD class=alignCenter headers="ar1 ar10 ac1 ac2 ac3">0</TD><TD class=alignCenter headers="ar1 ar10 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar10 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar10 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar10 ac1 ac2 ac7">0</TD><TD class=alignCenter headers="ar1 ar10 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac10 ac11">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac10 ac15">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac16">0</TD></TR><TR><TH id=ar11 class=bg-colour-yellow headers=ar1><ABBR title="Newfoundland/Labrador ">NL</ABBR>
</TH><TD class=alignCenter headers="ar1 ar11 ac1 ac2 ac3">1</TD><TD class=alignCenter headers="ar1 ar11 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar11 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar11 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar11 ac1 ac2 ac7">1</TD><TD class=alignCenter headers="ar1 ar11 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac10 ac11">1</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac10 ac15">1</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac16">0</TD></TR><TR><TH id=ar12 class=bg-colour-yellow headers=ar1>Canada</TH><TD class=alignCenter headers="ar1 ar12 ac1 ac2 ac3">14</TD><TD class=alignCenter headers="ar1 ar12 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar12 ac1 ac2 ac5">7</TD><TD class=alignCenter headers="ar1 ar12 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar12 ac1 ac2 ac7">7</TD><TD class=alignCenter headers="ar1 ar12 ac1 ac8">3</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac10 ac11">14</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac10 ac13">7</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac10 ac15">7</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac16">3</TD></TR></TBODY></TABLE>
<TABLE class=widthFull border=1 cellSpacing=0 cellPadding=2><CAPTION>Table 2. Weekly & Cumulative numbers of positive influenza specimens by age groups
reported through case-based laboratory reporting, Canada, 2012-2013 Table 2 note*
</CAPTION><THEAD><TR class=bg-colour-yellow><TH id=br1 rowSpan=3>Age groups</TH><TH id=bc1 colSpan=5>Weekly
(August 26 to September 8, 2012)
</TH><TH id=bc8 colSpan=5>Cumulative
(Aug. 28, 2012 to September 8, 2012)
</TH></TR><TR class=bg-colour-yellow><TH id=bc2 colSpan=4 headers=bc1>Influenza A</TH><TH id=bc7 headers=bc1>B</TH><TH id=bc9 colSpan=4 headers=bc8>Influenza A</TH><TH id=bc14 headers=bc8>B</TH></TR><TR class=bg-colour-yellow><TH id=bc3 headers=bc2>A Total</TH><TH id=bc4 headers=bc2>Pandemic H1N1</TH><TH id=bc5 headers=bc2>A/H3N2</TH><TH id=bc6 headers=bc2>A unsubtyped</TH><TH headers="bc1 bc7">Total</TH><TH id=bc10 headers=bc9>A Total</TH><TH id=bc11 headers=bc9>Pandemic H1N1</TH><TH id=bc12 headers=bc9>A/H3N2</TH><TH id=bc13 headers=bc9>A unsubtyped</TH><TH headers=bc14>Total</TH></TR></THEAD><TFOOT><TR><TD class=fontSize85 colSpan=11>* Please note that this table reflects the number of specimens for which demographic information was reported.
These represent a subset of all positive influenza cases reported. Delays in the reporting of data may cause data to change retrospectively.
</TD></TR></TFOOT><TBODY><TR><TH id=br2 headers=br1>< 5</TH><TD class=alignRight headers="br1 br2 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br2 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br2 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br2 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br2 bc1 bc7">0</TD><TD class=alignRight headers="br1 br2 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br2 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br2 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br2 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br2 bc8 bc14">0</TD></TR><TR><TH id=br3 headers=br1>5-19</TH><TD class=alignRight headers="br1 br3 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br3 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br3 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br3 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br3 bc1 bc7">0</TD><TD class=alignRight headers="br1 br3 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br3 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br3 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br3 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br3 bc8 bc14">0</TD></TR><TR><TH id=br4 headers=br1>20-44</TH><TD class=alignRight headers="br1 br4 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br4 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br4 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br4 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br4 bc1 bc7">0</TD><TD class=alignRight headers="br1 br4 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br4 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br4 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br4 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br4 bc8 bc14">0</TD></TR><TR><TH id=br5 headers=br1>45-64</TH><TD class=alignRight headers="br1 br5 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br5 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br5 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br5 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br5 bc1 bc7">0</TD><TD class=alignRight headers="br1 br5 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br5 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br5 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br5 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br5 bc8 bc14">0</TD></TR><TR><TH id=br6 headers=br1>65+</TH><TD class=alignRight headers="br1 br6 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br6 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br6 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br6 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br6 bc1 bc7">0</TD><TD class=alignRight headers="br1 br6 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br6 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br6 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br6 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br6 bc8 bc14">0</TD></TR><TR><TH id=br7 headers=br1>Unknown</TH><TD class=alignRight headers="br1 br7 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br7 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br7 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br7 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br7 bc1 bc7">0</TD><TD class=alignRight headers="br1 br7 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br7 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br7 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br7 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br7 bc8 bc14">0</TD></TR><TR><TH id=br8 headers=br1>Total</TH><TD class=alignRight headers="br1 br8 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br8 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br8 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br8 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br8 bc1 bc7">0</TD><TD class=alignRight headers="br1 br8 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br8 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br8 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br8 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br8 bc8 bc14">0</TD></TR></TBODY></TABLE>
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Figure 4. Influenza tests reported and percentage of tests positive, Canada,
by report week, 2012-2013
Text equivalent for figure 4Influenza tests reported and percentage of tests positive, Canada, by report week, 2011-2012
Figure 5. Percent positive influenza tests, compared to other respiratory viruses,
Canada, by reporting week, 2012-2013
Text equivalent for figure 5Percent positive influenza tests, compared to other respiratory viruses, Canada, by reporting week, 2011-2012
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Influenza strain characterizations
The National Microbiology Laboratory (NML) has not received any influenza virus specimens for strain characterization since the start of the 2012-2013 influenza season. However, of the influenza viruses characterized in the months of July and August 2012, the majority (52%) were antigenically similar to B/Wisconsin/01/2010 (Yamagata lineage) while the rest were antigenically similar to either A/Perth/16/2009 (24%) or B/Brisbane/60/2008 (Victoria lineage) (24%). The distribution of influenza strain characterizations for the 2011-2012 influenza season are presented in Figure 6.
Figure 6. Influenza strain characterizations, Canada, 2011-2012, N = 1, 443
Note: The recommended components for the 2011-2012 Northern Hemisphere influenza vaccine include: A/Perth/16/2009 (H3N2), A/California/7/2009 (H1N1) and B/Brisbane/60/2008.
Text equivalent for figure 6Influenza strain characterizations, Canada, 2011-2012
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Antiviral resistance
The National Microbiology Laboratory (NML) has not received any influenza virus specimens for antiviral resistance testing since the start of the 2012-2013 influenza season. However, antiviral resistance findings from the 2011-2012 influenza season are presented in Table 3.
<TABLE class=widthFull border=1 cellSpacing=0 cellPadding=2><CAPTION>Table 3. Antiviral resistance by influenza virus type and subtype, Canada, 2011-2012</CAPTION><THEAD><TR class=bg-colour-yellow><TH id=cr1 rowSpan=2>Virus type and subtype</TH><TH id=cc1 colSpan=2>Oseltamivir</TH><TH id=cc4 colSpan=2>Zanamivir</TH><TH id=cc7 colSpan=2>Amantadine</TH></TR><TR class=bg-colour-yellow><TH id=cc2 headers=cc1># tested</TH><TH id=cc3 headers=cc1># resistant (%)</TH><TH id=cc5 headers=cc4># tested</TH><TH id=cc6 headers=cc4># resistant (%)</TH><TH id=cc8 headers=cc7># tested</TH><TH id=cc9 headers=cc7># resistant (%)</TH></TR></THEAD><TFOOT><TR><TD class=fontSize85 colSpan=7><SUP>*</SUP> NA - not applicable</TD></TR></TFOOT><TBODY><TR><TH id=cr2 class="alignLeft bg-colour-blue" headers=cr1>A (H3N2)</TH><TD class=alignRight headers="cr2 cc2">256</TD><TD class=alignRight headers="cr2 cc3">0</TD><TD class=alignRight headers="cr2 cc5">255</TD><TD class=alignRight headers="cr2 cc6">0</TD><TD class=alignRight headers="cr2 cc8">450</TD><TD class=alignRight headers="cr2 cc9">449 (99.8%)</TD></TR><TR><TH id=cr3 class="alignLeft bg-colour-blue" headers=cr1>A (H1N1)</TH><TD class=alignRight headers="cr3 cc2">256</TD><TD class=alignRight headers="cr3 cc3">0</TD><TD class=alignRight headers="cr3 cc5">256</TD><TD class=alignRight headers="cr3 cc6">0</TD><TD class=alignRight headers="cr3 cc8">356</TD><TD class=alignRight headers="cr3 cc9">356 (100%)</TD></TR><TR><TH id=cr4 class="alignLeft bg-colour-blue" headers=cr1>B</TH><TD class=alignRight headers="cr4 cc2">967</TD><TD class=alignRight headers="cr4 cc3">0</TD><TD class=alignRight headers="cr4 cc5">967</TD><TD class=alignRight headers="cr4 cc6">0</TD><TD class=alignRight headers="cr4 cc8">NA <SUP>*</SUP></TD><TD class=alignRight headers="cr4 cc9">NA <SUP>*</SUP></TD></TR><TR><TH id=cr5 class="alignLeft bg-colour-blue" headers=cr1>TOTAL</TH><TD class=alignRight headers="cr5 cc2">1479</TD><TD class=alignRight headers="cr5 cc3">0</TD><TD class=alignRight headers="cr5 cc5">1478</TD><TD class=alignRight headers="cr5 cc6">0</TD><TD class=alignRight headers="cr5 cc8">806</TD><TD class=alignRight headers="cr5 cc9">805 (99.9%)</TD></TR></TBODY></TABLE>
Influenza-like Illness (ILI) Consultation Rate
The national ILI consultation rate remained similar to the rates from two week prior and was 7.6 ILI consultations per 1,000 patient visits in week 35 and 5.6 per 1,000 visits in week 36; both rates were within the expected levels for this time of year (Figure 7). The highest consultation rates by age group were observed in those <5 years of age in both weeks (12.2/1,000 in week 35 and 18.1/1,000 in week 36.
Figure 7. Influenza-like illness (ILI) consultation rates, Canada, by report week, 2012-2013 compared to 1996/97 through to 2011/12 seasons (with pandemic data suppressed)
Note:No data available for mean rate in previous years for weeks 19 to 39 (1996-1997 through 2002-2003 seasons). Delays in the reporting of data may cause data to change retrospectively.
Text equivalent for figure 7Influenza-like illness (ILI) consultation rates, Canada, by report week, 2011-2012 compared to 1996/97 through to 2010/11 seasons (with pandemic data suppressed)
Severe Respiratory Illness Surveillance
Paediatric Influenza Hospitalizations and Deaths (IMPACT)
No laboratory-confirmed influenza-associated paediatric (16 years of age and under) hospitalizations have been reported by the Immunization Monitoring Program Active (IMPACT) network since the start of the 2012-2013 influenza season.
Influenza Hospitalizations and Deaths (Aggregate Surveillance System)
No laboratory-confirmed influenza-associated hospitalizations, ICU admissions or deaths have been reported since the start of the 2012-2013 influenza season.
Note: Influenza-associated hospitalizations are not reported to PHAC by the following Provinces: BC, NU, QC, NS, & NB. Only hospitalizations that require intensive medical care are reported by SK. ICU admissions are not reported in ON.
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Posted 2012-09-14For readers interested in the <ABBR title="Portable Document Format">PDF</ABBR> version, the document is available for downloading or viewing:
<A title="Flu Watch (Version PDF, 113 KB - 6 pages)" href="http://www.phac-aspc.gc.ca/fluwatch/12-13/w36_12/pdf/fw2012-36-eng.pdf">2011-2012 FluWatch: August 26 to September 8, 2012 (Weeks 35 & 36) (<ABBR title="Portable Document Format">PDF</ABBR> Version - 113 <ABBR title=Kilobytes>KB</ABBR> - 6 pages)
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Overall Influenza Summary
- Influenza activity in Canada remains low; however several regions have reported either sporadic or localized activity over the two-week period (in BC, MB, ON & QC)
- In weeks 35 and 36, a total of 17 laboratory detections of influenza were reported of which 82.4% were for influenza A viruses (7 A(H3) and 7 A(un-subtyped)) and 17.6% for influenza B viruses
- One region (in MB) reported localized activity in week 36 due to an outbreak in a long-term care facility
- No influenza-associated hospitalizations were reported over the two-week period
- The ILI consultation rate in weeks 35 and 36 were within the expected levels for this time of year
Influenza Activity (geographic spread) and Outbreaks
In week 35, 2 regions (within BC & ON) reported sporadic activity while the rest reported no activity. In week 36, 1 region (within MB) reported localized activity, 2 regions (within ON & QC) reported sporadic activity and the rest reported no activity (see Figure 1). Note that no data was received from AB, SK, NS, PEI and YT for week 35 and no data was received from SK, PEI, NL and YT for week 36. One new outbreak was reported in week 36 in a long-term care facility (Figure 3) in MB and was due to influenza A/H3.
Figure 1. Map of overall Influenza activity level by province and territory,
Canada, Week 36
Note: Influenza activity levels, as represented on this map, are assigned and reported by Provincial and Territorial Ministries of Health, based on laboratory confirmations, sentinel ILI rates (see graphs and tables) and reported outbreaks. Please refer to detailed definitions on the last page. For areas where no data is reported, late reports from these provinces and territories will appear on the FluWatch website.
Text equivalent for figure 1Map of overall Influenza activity level by province and territory, Canada
Figure 2. Number of influenza surveillance regions<SUP title="sub-regions within the province or territory as defined by the provincial/territorial epidemiologist. Graph may change as late returns come in">?</SUP> reporting widespread or localized influenza activity, Canada, by report week, 2012-2013 (N=56)
? sub-regions within the province or territory as defined by the provincial/territorial epidemiologist. Graph may change as late returns come in.
Text equivalent for figure 2Number of influenza surveillance regions reporting widespread or localized influenza activity, Canada, by report week, 2011-2012 (N=56)
Figure 3. Overall Number of Influenza Outbreaks, Canada, by Report Week, 2012-2013
Text equivalent for figure 3Overall Number of Influenza Outbreaks, Canada, by Report Week, 2011-2012
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Influenza and Other Respiratory Virus Detections
The proportion of positive influenza tests increased slightly from two weeks ago (when the percent positive was 0.2%) and was 0.9% in week 35 and 0.6% in week 36 (Figure 4 & 5). The proportion of positive detections for influenza A (0.8% in week 35 and 0.4% in week 36) was slightly higher than the proportion positive for influenza B detections (0.1% and 0.2% respectively). Over the two week period, influenza A detections were reported in BC, AB, MB, ON, QC & NL while influenza B detections were reported in AB, SK & QC.
Cumulative to date of influenza virus detections by type/subtype is as follows: 82.4% influenza A (50.0% - A(H3) and 50.0% - unsubtyped) and 17.6% influenza B (Table 1).
Detailed information on age and type/subtype of the positive influenza cases to date will be presented once more information becomes available (Table 2).
The percentage positive for rhinovirus detections was similar to previous weeks (18.0% & 23.1% in weeks 35 & 36 respectively) and remains the highest compared to the other respiratory viruses. The percentage positive for parainfluenza viruses continued to decline and was 1.7% in week 36. The percentage positive for the other respiratory viruses in week 36 remained low: RSV-.7%; adenovirus-1.1%; hMPV-0.8%; and coronavirus-0.7% (Figure 5). For more details, see the weekly Respiratory Virus Detections in Canada Report.
<TABLE class=widthFull border=1 cellSpacing=0 cellPadding=2><CAPTION class=alignCenter>Table 1: Weekly & Cumulative numbers of positive influenza specimens
by Provincial Laboratories, Canada, 2012-2013
</CAPTION><THEAD><TR class=bg-colour-yellow><TH id=ar1 rowSpan=3>Reporting provinces</TH><TH id=ac1 colSpan=6>Weekly
(August 26 to September 8, 2012)
</TH><TH id=ac9 colSpan=6>Cumulative
(August 28, 2012 to September 8, 2012)
</TH></TR><TR class=bg-colour-yellow><TH id=ac2 colSpan=5 headers=ac1>Influenza A</TH><TH id=ac8 headers=ac1>Influenza
B
</TH><TH id=ac10 colSpan=5 headers=ac9>Influenza A</TH><TH id=ac16 headers=ac9>Influenza
B
</TH></TR><TR class=bg-colour-yellow><TH id=ac3 headers=ac2>A Total</TH><TH id=ac4 headers=ac2>A(H1)</TH><TH id=ac5 headers=ac2>A(H3)</TH><TH id=ac6 headers=ac2>Pand H1N1</TH><TH id=ac7 class=noWrap headers=ac2>A
( <ABBR title=unsubtyped>Un S</ABBR>)Table 1 note*
</TH><TH headers="ac1 ac8">Total</TH><TH id=ac11 headers=ac10>A Total</TH><TH id=ac12 headers=ac10>A(H1)</TH><TH id=ac13 headers=ac10>A(H3)</TH><TH id=ac14 headers=ac10>Pand H1N1</TH><TH id=ac15 class=noWrap headers=ac10>A
(Un S) Table 1 note*
</TH><TH headers=ac16>Total</TH></TR></THEAD><TFOOT><TR><TD class=fontSize85 colSpan=13>* Unsubtyped: The specimen was typed as influenza A, but no test for subtyping was performed. Specimens from NT, YT, and NU are sent to reference laboratories in other provinces. Note: Weekly data is based on week of positive lab detection. Cumulative data includes updates to previous weeks; due to reporting delays, the sum of weekly report totals do not add up to cumulative totals.</TD></TR></TFOOT><TBODY><TR><TH id=ar2 class=bg-colour-yellow headers=ar1><ABBR title="British Columbia ">BC</ABBR></TH><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac3">2</TD><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac5">1</TD><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac7">1</TD><TD class=alignCenter headers="ar1 ar2 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac10 ac11">2</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac10 ac13">1</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac10 ac15">1</TD><TD class=alignCenter headers="ar1 ar2 ac9 ac16">0</TD></TR><TR><TH id=ar3 class=bg-colour-yellow headers=ar1><ABBR title=Alberta>AB</ABBR></TH><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac3">2</TD><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac5">1</TD><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac7">1</TD><TD class=alignCenter headers="ar1 ar3 ac1 ac8">1</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac10 ac11">2</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac10 ac13">1</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac10 ac15">1</TD><TD class=alignCenter headers="ar1 ar3 ac9 ac16">1</TD></TR><TR><TH id=ar4 class=bg-colour-yellow headers=ar1><ABBR title=Saskatchewan>SK</ABBR></TH><TD class=alignCenter headers="ar1 ar4 ac1 ac2 ac3">0</TD><TD class=alignCenter headers="ar1 ar4 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar4 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar4 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar4 ac1 ac2 ac7">0</TD><TD class=alignCenter headers="ar1 ar4 ac1 ac8">1</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac10 ac11">0</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac10 ac15">0</TD><TD class=alignCenter headers="ar1 ar4 ac9 ac16">1</TD></TR><TR><TH id=ar5 class=bg-colour-yellow headers=ar1><ABBR title=Manitoba>MB</ABBR></TH><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac3">3</TD><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac5">3</TD><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac7">0</TD><TD class=alignCenter headers="ar1 ar5 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac10 ac11">3</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac10 ac13">3</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac10 ac15">0</TD><TD class=alignCenter headers="ar1 ar5 ac9 ac16">0</TD></TR><TR><TH id=ar6 class=bg-colour-yellow headers=ar1><ABBR title=Ontario>ON</ABBR></TH><TD class=alignCenter headers="ar1 ar6 ac1 ac2 ac3">5</TD><TD class=alignCenter headers="ar1 ar6 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar6 ac1 ac2 ac5">2</TD><TD class=alignCenter headers="ar1 ar6 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar6 ac1 ac2 ac7">3</TD><TD class=alignCenter headers="ar1 ar6 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac10 ac11">5</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac10 ac13">2</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac10 ac15">3</TD><TD class=alignCenter headers="ar1 ar6 ac9 ac16">0</TD></TR><TR><TH id=ar7 class=bg-colour-yellow headers=ar1><ABBR title=Quebec>QC</ABBR>
</TH><TD class=alignCenter headers="ar1 ar7 ac1 ac2 ac3">1</TD><TD class=alignCenter headers="ar1 ar7 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar7 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar7 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar7 ac1 ac2 ac7">1</TD><TD class=alignCenter headers="ar1 ar7 ac1 ac8">1</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac10 ac11">1</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac10 ac15">1</TD><TD class=alignCenter headers="ar1 ar7 ac9 ac16">1</TD></TR><TR><TH id=ar8 class=bg-colour-yellow headers=ar1><ABBR title="New Brunswick">NB</ABBR>
</TH><TD class=alignCenter headers="ar1 ar8 ac1 ac2 ac3">0</TD><TD class=alignCenter headers="ar1 ar8 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar8 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar8 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar8 ac1 ac2 ac7">0</TD><TD class=alignCenter headers="ar1 ar8 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac10 ac11">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac10 ac15">0</TD><TD class=alignCenter headers="ar1 ar8 ac9 ac16">0</TD></TR><TR><TH id=ar9 class=bg-colour-yellow headers=ar1><ABBR title="Nova Scotia ">NS</ABBR>
</TH><TD class=alignCenter headers="ar1 ar9 ac1 ac2 ac3">0</TD><TD class=alignCenter headers="ar1 ar9 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar9 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar9 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar9 ac1 ac2 ac7">0</TD><TD class=alignCenter headers="ar1 ar9 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac10 ac11">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac10 ac15">0</TD><TD class=alignCenter headers="ar1 ar9 ac9 ac16">0</TD></TR><TR><TH id=ar10 class=bg-colour-yellow headers=ar1><ABBR title="Prince Edward Island ">PE</ABBR>
</TH><TD class=alignCenter headers="ar1 ar10 ac1 ac2 ac3">0</TD><TD class=alignCenter headers="ar1 ar10 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar10 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar10 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar10 ac1 ac2 ac7">0</TD><TD class=alignCenter headers="ar1 ar10 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac10 ac11">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac10 ac15">0</TD><TD class=alignCenter headers="ar1 ar10 ac9 ac16">0</TD></TR><TR><TH id=ar11 class=bg-colour-yellow headers=ar1><ABBR title="Newfoundland/Labrador ">NL</ABBR>
</TH><TD class=alignCenter headers="ar1 ar11 ac1 ac2 ac3">1</TD><TD class=alignCenter headers="ar1 ar11 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar11 ac1 ac2 ac5">0</TD><TD class=alignCenter headers="ar1 ar11 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar11 ac1 ac2 ac7">1</TD><TD class=alignCenter headers="ar1 ar11 ac1 ac8">0</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac10 ac11">1</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac10 ac13">0</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac10 ac15">1</TD><TD class=alignCenter headers="ar1 ar11 ac9 ac16">0</TD></TR><TR><TH id=ar12 class=bg-colour-yellow headers=ar1>Canada</TH><TD class=alignCenter headers="ar1 ar12 ac1 ac2 ac3">14</TD><TD class=alignCenter headers="ar1 ar12 ac1 ac2 ac4">0</TD><TD class=alignCenter headers="ar1 ar12 ac1 ac2 ac5">7</TD><TD class=alignCenter headers="ar1 ar12 ac1 ac2 ac6">0</TD><TD class=alignCenter headers="ar1 ar12 ac1 ac2 ac7">7</TD><TD class=alignCenter headers="ar1 ar12 ac1 ac8">3</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac10 ac11">14</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac10 ac12">0</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac10 ac13">7</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac10 ac14">0</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac10 ac15">7</TD><TD class=alignCenter headers="ar1 ar12 ac9 ac16">3</TD></TR></TBODY></TABLE>
<TABLE class=widthFull border=1 cellSpacing=0 cellPadding=2><CAPTION>Table 2. Weekly & Cumulative numbers of positive influenza specimens by age groups
reported through case-based laboratory reporting, Canada, 2012-2013 Table 2 note*
</CAPTION><THEAD><TR class=bg-colour-yellow><TH id=br1 rowSpan=3>Age groups</TH><TH id=bc1 colSpan=5>Weekly
(August 26 to September 8, 2012)
</TH><TH id=bc8 colSpan=5>Cumulative
(Aug. 28, 2012 to September 8, 2012)
</TH></TR><TR class=bg-colour-yellow><TH id=bc2 colSpan=4 headers=bc1>Influenza A</TH><TH id=bc7 headers=bc1>B</TH><TH id=bc9 colSpan=4 headers=bc8>Influenza A</TH><TH id=bc14 headers=bc8>B</TH></TR><TR class=bg-colour-yellow><TH id=bc3 headers=bc2>A Total</TH><TH id=bc4 headers=bc2>Pandemic H1N1</TH><TH id=bc5 headers=bc2>A/H3N2</TH><TH id=bc6 headers=bc2>A unsubtyped</TH><TH headers="bc1 bc7">Total</TH><TH id=bc10 headers=bc9>A Total</TH><TH id=bc11 headers=bc9>Pandemic H1N1</TH><TH id=bc12 headers=bc9>A/H3N2</TH><TH id=bc13 headers=bc9>A unsubtyped</TH><TH headers=bc14>Total</TH></TR></THEAD><TFOOT><TR><TD class=fontSize85 colSpan=11>* Please note that this table reflects the number of specimens for which demographic information was reported.
These represent a subset of all positive influenza cases reported. Delays in the reporting of data may cause data to change retrospectively.
</TD></TR></TFOOT><TBODY><TR><TH id=br2 headers=br1>< 5</TH><TD class=alignRight headers="br1 br2 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br2 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br2 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br2 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br2 bc1 bc7">0</TD><TD class=alignRight headers="br1 br2 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br2 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br2 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br2 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br2 bc8 bc14">0</TD></TR><TR><TH id=br3 headers=br1>5-19</TH><TD class=alignRight headers="br1 br3 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br3 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br3 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br3 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br3 bc1 bc7">0</TD><TD class=alignRight headers="br1 br3 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br3 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br3 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br3 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br3 bc8 bc14">0</TD></TR><TR><TH id=br4 headers=br1>20-44</TH><TD class=alignRight headers="br1 br4 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br4 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br4 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br4 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br4 bc1 bc7">0</TD><TD class=alignRight headers="br1 br4 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br4 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br4 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br4 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br4 bc8 bc14">0</TD></TR><TR><TH id=br5 headers=br1>45-64</TH><TD class=alignRight headers="br1 br5 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br5 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br5 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br5 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br5 bc1 bc7">0</TD><TD class=alignRight headers="br1 br5 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br5 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br5 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br5 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br5 bc8 bc14">0</TD></TR><TR><TH id=br6 headers=br1>65+</TH><TD class=alignRight headers="br1 br6 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br6 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br6 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br6 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br6 bc1 bc7">0</TD><TD class=alignRight headers="br1 br6 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br6 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br6 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br6 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br6 bc8 bc14">0</TD></TR><TR><TH id=br7 headers=br1>Unknown</TH><TD class=alignRight headers="br1 br7 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br7 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br7 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br7 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br7 bc1 bc7">0</TD><TD class=alignRight headers="br1 br7 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br7 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br7 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br7 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br7 bc8 bc14">0</TD></TR><TR><TH id=br8 headers=br1>Total</TH><TD class=alignRight headers="br1 br8 bc1 bc2 bc3">0</TD><TD class=alignRight headers="br1 br8 bc1 bc2 bc4">0</TD><TD class=alignRight headers="br1 br8 bc1 bc2 bc5">0</TD><TD class=alignRight headers="br1 br8 bc1 bc2 bc6">0</TD><TD class=alignRight headers="br1 br8 bc1 bc7">0</TD><TD class=alignRight headers="br1 br8 bc8 bc9 bc10">0</TD><TD class=alignRight headers="br1 br8 bc8 bc9 bc11">0</TD><TD class=alignRight headers="br1 br8 bc8 bc9 bc12">0</TD><TD class=alignRight headers="br1 br8 bc8 bc9 bc13">0</TD><TD class=alignRight headers="br1 br8 bc8 bc14">0</TD></TR></TBODY></TABLE>
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Figure 4. Influenza tests reported and percentage of tests positive, Canada,
by report week, 2012-2013
Text equivalent for figure 4Influenza tests reported and percentage of tests positive, Canada, by report week, 2011-2012
Figure 5. Percent positive influenza tests, compared to other respiratory viruses,
Canada, by reporting week, 2012-2013
Text equivalent for figure 5Percent positive influenza tests, compared to other respiratory viruses, Canada, by reporting week, 2011-2012
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Influenza strain characterizations
The National Microbiology Laboratory (NML) has not received any influenza virus specimens for strain characterization since the start of the 2012-2013 influenza season. However, of the influenza viruses characterized in the months of July and August 2012, the majority (52%) were antigenically similar to B/Wisconsin/01/2010 (Yamagata lineage) while the rest were antigenically similar to either A/Perth/16/2009 (24%) or B/Brisbane/60/2008 (Victoria lineage) (24%). The distribution of influenza strain characterizations for the 2011-2012 influenza season are presented in Figure 6.
Figure 6. Influenza strain characterizations, Canada, 2011-2012, N = 1, 443
Note: The recommended components for the 2011-2012 Northern Hemisphere influenza vaccine include: A/Perth/16/2009 (H3N2), A/California/7/2009 (H1N1) and B/Brisbane/60/2008.
Text equivalent for figure 6Influenza strain characterizations, Canada, 2011-2012
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Antiviral resistance
The National Microbiology Laboratory (NML) has not received any influenza virus specimens for antiviral resistance testing since the start of the 2012-2013 influenza season. However, antiviral resistance findings from the 2011-2012 influenza season are presented in Table 3.
<TABLE class=widthFull border=1 cellSpacing=0 cellPadding=2><CAPTION>Table 3. Antiviral resistance by influenza virus type and subtype, Canada, 2011-2012</CAPTION><THEAD><TR class=bg-colour-yellow><TH id=cr1 rowSpan=2>Virus type and subtype</TH><TH id=cc1 colSpan=2>Oseltamivir</TH><TH id=cc4 colSpan=2>Zanamivir</TH><TH id=cc7 colSpan=2>Amantadine</TH></TR><TR class=bg-colour-yellow><TH id=cc2 headers=cc1># tested</TH><TH id=cc3 headers=cc1># resistant (%)</TH><TH id=cc5 headers=cc4># tested</TH><TH id=cc6 headers=cc4># resistant (%)</TH><TH id=cc8 headers=cc7># tested</TH><TH id=cc9 headers=cc7># resistant (%)</TH></TR></THEAD><TFOOT><TR><TD class=fontSize85 colSpan=7><SUP>*</SUP> NA - not applicable</TD></TR></TFOOT><TBODY><TR><TH id=cr2 class="alignLeft bg-colour-blue" headers=cr1>A (H3N2)</TH><TD class=alignRight headers="cr2 cc2">256</TD><TD class=alignRight headers="cr2 cc3">0</TD><TD class=alignRight headers="cr2 cc5">255</TD><TD class=alignRight headers="cr2 cc6">0</TD><TD class=alignRight headers="cr2 cc8">450</TD><TD class=alignRight headers="cr2 cc9">449 (99.8%)</TD></TR><TR><TH id=cr3 class="alignLeft bg-colour-blue" headers=cr1>A (H1N1)</TH><TD class=alignRight headers="cr3 cc2">256</TD><TD class=alignRight headers="cr3 cc3">0</TD><TD class=alignRight headers="cr3 cc5">256</TD><TD class=alignRight headers="cr3 cc6">0</TD><TD class=alignRight headers="cr3 cc8">356</TD><TD class=alignRight headers="cr3 cc9">356 (100%)</TD></TR><TR><TH id=cr4 class="alignLeft bg-colour-blue" headers=cr1>B</TH><TD class=alignRight headers="cr4 cc2">967</TD><TD class=alignRight headers="cr4 cc3">0</TD><TD class=alignRight headers="cr4 cc5">967</TD><TD class=alignRight headers="cr4 cc6">0</TD><TD class=alignRight headers="cr4 cc8">NA <SUP>*</SUP></TD><TD class=alignRight headers="cr4 cc9">NA <SUP>*</SUP></TD></TR><TR><TH id=cr5 class="alignLeft bg-colour-blue" headers=cr1>TOTAL</TH><TD class=alignRight headers="cr5 cc2">1479</TD><TD class=alignRight headers="cr5 cc3">0</TD><TD class=alignRight headers="cr5 cc5">1478</TD><TD class=alignRight headers="cr5 cc6">0</TD><TD class=alignRight headers="cr5 cc8">806</TD><TD class=alignRight headers="cr5 cc9">805 (99.9%)</TD></TR></TBODY></TABLE>
Influenza-like Illness (ILI) Consultation Rate
The national ILI consultation rate remained similar to the rates from two week prior and was 7.6 ILI consultations per 1,000 patient visits in week 35 and 5.6 per 1,000 visits in week 36; both rates were within the expected levels for this time of year (Figure 7). The highest consultation rates by age group were observed in those <5 years of age in both weeks (12.2/1,000 in week 35 and 18.1/1,000 in week 36.
Figure 7. Influenza-like illness (ILI) consultation rates, Canada, by report week, 2012-2013 compared to 1996/97 through to 2011/12 seasons (with pandemic data suppressed)
Note:No data available for mean rate in previous years for weeks 19 to 39 (1996-1997 through 2002-2003 seasons). Delays in the reporting of data may cause data to change retrospectively.
Text equivalent for figure 7Influenza-like illness (ILI) consultation rates, Canada, by report week, 2011-2012 compared to 1996/97 through to 2010/11 seasons (with pandemic data suppressed)
Severe Respiratory Illness Surveillance
Paediatric Influenza Hospitalizations and Deaths (IMPACT)
No laboratory-confirmed influenza-associated paediatric (16 years of age and under) hospitalizations have been reported by the Immunization Monitoring Program Active (IMPACT) network since the start of the 2012-2013 influenza season.
Influenza Hospitalizations and Deaths (Aggregate Surveillance System)
No laboratory-confirmed influenza-associated hospitalizations, ICU admissions or deaths have been reported since the start of the 2012-2013 influenza season.
Note: Influenza-associated hospitalizations are not reported to PHAC by the following Provinces: BC, NU, QC, NS, & NB. Only hospitalizations that require intensive medical care are reported by SK. ICU admissions are not reported in ON.
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