FluWatch report: October 5 to 11, 2014 (Week 41)
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<A title="Flu Watch (Version PDF, 288 KB - 10 pages)" href="http://www.phac-aspc.gc.ca/fluwatch/14-15/w41_14/pdf/fw2014-41-eng.pdf">FluWatch report: October 5 to 11, 2014 (Week 41) (<ABBR title="Portable Document Format">PDF</ABBR> Version - 294 <ABBR title=Kilobytes>KB</ABBR> - 10 pages)
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Overall Summary
- Influenza indicators (activity levels, influenza detections, ILI and hospitalizations) in some regions across Canada continued to increase in week 41.
- So far this year, the H3N2 has been the most common strain affecting Canadians.
- So far this season, the majority of influenza laboratory detections and hospitalizations were in seniors ≥65 years of age.
Influenza/ILI Activity (geographic spread)
In week 41, the majority of regions in Canada reported no activity; however, three regions (BC(1), ON(2)) reported localized activity and 13 regions (BC(2), AB(4), MB(1), ON(2) and QC(4)) reported sporadic activity (Figure 1).
Figure 1. Map of overall influenza/ILI activity level by province and territory, Canada, Week 41
Note: Influenza/ILI 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 and reported outbreaks. Please refer to detailed definitions at the end of the report. Maps from previous weeks, including any retrospective updates, are available on the FluWatch website.
Text equivalent for figure 1Map of overall Influenza activity level by province and territory, Canada
Influenza and Other Respiratory Virus Detections
The number of positive influenza tests continued to increase in week 41 to 50 influenza detections (1.7% of tests) (Figure 2). To date, 86% of influenza detections have been influenza A, and the majority of those subtyped have been A(H3) (Table 1). Among cases with reported age, the largest proportion was in those ≥65 years of age (56%) (Table 2).
Figure 2. Number of positive influenza tests and percentage of tests positive, by type, subtype and report week, Canada, 2014-15
Text equivalent for figure 2Number of positive influenza tests and percentage of tests positive, by type, subtype and report week, Canada, 2013-14
In week 41, detections of some respiratory viruses were at inter-seasonal levels (human metapneumovirus) or in keeping with their usual pattern of seasonal circulation (RSV, parainfluenza, and coronavirus). Detections of adenovirus were higher than in previous seasons. Detections of rhinovirus seem to have peaked in week 39 at a level higher than observed in previous seasons, but decreased over the past two weeks (Figure 3).
For more details, see the weekly Respiratory Virus Detections in Canada Report.
Figure 3. Number of positive laboratory tests for other respiratory viruses by report week, Canada, 2014-15
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RSV: Respiratory syncytial virus; hMPV: Human metapneumovirus
Text equivalent for figure 3Overall Number of Influenza Outbreaks, Canada, by Report Week, 2013-2014
<TABLE id=t1 class=widthFull border=1 cellSpacing=0 cellPadding=2><CAPTION class=alignCenter>Table 1: Weekly and cumulative numbers of positive influenza specimens
by type, subtype and province, Canada, 2014-15
</CAPTION><THEAD><TR class=bg-colour-yellow><TH id=ar1 rowSpan=3>Reporting provinces <SUP>1</SUP></TH><TH id=ac1 colSpan=5>Two weeks (October 5 to 11, 2014)</TH><TH id=ac8 colSpan=5>Cumulative
(August 24 to October 11, 2014)
</TH></TR><TR class=bg-colour-yellow><TH id=ac2 colSpan=4 headers=ac1>Influenza A</TH><TH id=ac7 headers=ac1>B</TH><TH id=ac9 colSpan=4 headers=ac8>Influenza A</TH><TH id=ac14 headers=ac8>B</TH></TR><TR class=bg-colour-grey-light><TH id=ac3 headers="ac1 ac2">A Total</TH><TH id=ac4 class=" bg-colour-blue" headers="ac1 ac2">A(H1)pdm09</TH><TH id=ac5 class=" bg-colour-blue" headers="ac1 ac2">A(H3)</TH><TH id=ac6 class=" bg-colour-blue" headers="ac1 ac2">A(UnS)</TH><TH class=alignCenter headers="ac1 ac7">B Total</TH><TH id=ac10 headers="ac8 ac9">A Total</TH><TH id=ac11 class=" bg-colour-blue" headers="ac8 ac9">A(H1)pdm09</TH><TH id=ac12 class=" bg-colour-blue" headers="ac8 ac9">A(H3)</TH><TH id=ac13 class=" bg-colour-blue" headers="ac8 ac9">A(UnS)</TH><TD class=alignCenter headers="ac8 ac14">B Total</TD></TR></THEAD><TFOOT><TR><TD class=fontSize85 colSpan=11><SUP>1 </SUP>Specimens from NT, YT, and NU are sent to reference laboratories in other provinces. Cumulative data includes updates to previous weeks.
<SUP>2 </SUP>Percentage of tests positive for sub-types of influenza A are a percentage of all influenza A detections.
UnS: unsubtyped: The specimen was typed as influenza A, but no result for subtyping was available.
</TD></TR></TFOOT><TBODY><TR><TH id=ar2 class=alignLeft headers=ar1>BC</TH><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac3">25 </TD><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac4">0 </TD><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac5">17 </TD><TD class=alignCenter headers="ar1 ar2 ac1 ac2 ac6">8 </TD><TD class=alignCenter headers="ar1 ar2 ac1 ac7">0 </TD><TD class=alignCenter headers="ar1 ar2 ac8 ac9 ac10">49 </TD><TD class=alignCenter headers="ar1 ar2 ac8 ac9 ac11">2 </TD><TD class=alignCenter headers="ar1 ar2 ac8 ac9 ac12">35 </TD><TD class=alignCenter headers="ar1 ar2 ac8 ac9 ac13">12 </TD><TD class=alignCenter headers="ar1 ar2 ac8 ac14">2 </TD></TR><TR><TH id=ar3 class=alignLeft headers=ar1>AB</TH><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac3">10 </TD><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac4">0 </TD><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac5">6 </TD><TD class=alignCenter headers="ar1 ar3 ac1 ac2 ac6">4 </TD><TD class=alignCenter headers="ar1 ar3 ac1 ac7">3 </TD><TD class=alignCenter headers="ar1 ar3 ac8 ac9 ac10">40 </TD><TD class=alignCenter headers="ar1 ar3 ac8 ac9 ac11">0 </TD><TD class=alignCenter headers="ar1 ar3 ac8 ac9 ac12">34 </TD><TD class=alignCenter headers="ar1 ar3 ac8 ac9 ac13">6 </TD><TD class=alignCenter headers="ar1 ar3 ac8 ac14">7 </TD></TR><TR><TH id=ar4 class=alignLeft headers=ar1>SK</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 ac7">0 </TD><TD class=alignCenter headers="ar1 ar4 ac8 ac9 ac10">2 </TD><TD class=alignCenter headers="ar1 ar4 ac8 ac9 ac11">0 </TD><TD class=alignCenter headers="ar1 ar4 ac8 ac9 ac12">0 </TD><TD class=alignCenter headers="ar1 ar4 ac8 ac9 ac13">2 </TD><TD class=alignCenter headers="ar1 ar4 ac8 ac14">0 </TD></TR><TR><TH id=ar5 class=alignLeft headers=ar1>MB</TH><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac3">0 </TD><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac4">0 </TD><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac5">0 </TD><TD class=alignCenter headers="ar1 ar5 ac1 ac2 ac6">0 </TD><TD class=alignCenter headers="ar1 ar5 ac1 ac7">1 </TD><TD class=alignCenter headers="ar1 ar5 ac8 ac9 ac10">1 </TD><TD class=alignCenter headers="ar1 ar5 ac8 ac9 ac11">0 </TD><TD class=alignCenter headers="ar1 ar5 ac8 ac9 ac12">1 </TD><TD class=alignCenter headers="ar1 ar5 ac8 ac9 ac13">0 </TD><TD class=alignCenter headers="ar1 ar5 ac8 ac14">1 </TD></TR><TR><TH id=ar6 class=alignLeft headers=ar1>ON</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">3 </TD><TD class=alignCenter headers="ar1 ar6 ac1 ac7">1 </TD><TD class=alignCenter headers="ar1 ar6 ac8 ac9 ac10">18 </TD><TD class=alignCenter headers="ar1 ar6 ac8 ac9 ac11">1 </TD><TD class=alignCenter headers="ar1 ar6 ac8 ac9 ac12">11 </TD><TD class=alignCenter headers="ar1 ar6 ac8 ac9 ac13">6 </TD><TD class=alignCenter headers="ar1 ar6 ac8 ac14">5 </TD></TR><TR><TH id=ar7 class=alignLeft headers=ar1>QC</TH><TD class=alignCenter headers="ar1 ar7 ac1 ac2 ac3">5 </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">5 </TD><TD class=alignCenter headers="ar1 ar7 ac1 ac7">0 </TD><TD class=alignCenter headers="ar1 ar7 ac8 ac9 ac10">17 </TD><TD class=alignCenter headers="ar1 ar7 ac8 ac9 ac11">0 </TD><TD class=alignCenter headers="ar1 ar7 ac8 ac9 ac12">0 </TD><TD class=alignCenter headers="ar1 ar7 ac8 ac9 ac13">17 </TD><TD class=alignCenter headers="ar1 ar7 ac8 ac14">6 </TD></TR><TR><TH id=ar8 class=alignLeft headers=ar1>NB</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 ac7">0 </TD><TD class=alignCenter headers="ar1 ar8 ac8 ac9 ac10">0 </TD><TD class=alignCenter headers="ar1 ar8 ac8 ac9 ac11">0 </TD><TD class=alignCenter headers="ar1 ar8 ac8 ac9 ac12">0 </TD><TD class=alignCenter headers="ar1 ar8 ac8 ac9 ac13">0 </TD><TD class=alignCenter headers="ar1 ar8 ac8 ac14">0 </TD></TR><TR><TH id=ar9 class=alignLeft headers=ar1>NS</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 ac7">0 </TD><TD class=alignCenter headers="ar1 ar9 ac8 ac9 ac10">0 </TD><TD class=alignCenter headers="ar1 ar9 ac8 ac9 ac11">0 </TD><TD class=alignCenter headers="ar1 ar9 ac8 ac9 ac12">0 </TD><TD class=alignCenter headers="ar1 ar9 ac8 ac9 ac13">0 </TD><TD class=alignCenter headers="ar1 ar9 ac8 ac14">0 </TD></TR><TR><TH id=ar10 class=alignLeft headers=ar1>PE</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 ac7">0 </TD><TD class=alignCenter headers="ar1 ar10 ac8 ac9 ac10">1 </TD><TD class=alignCenter headers="ar1 ar10 ac8 ac9 ac11">0 </TD><TD class=alignCenter headers="ar1 ar10 ac8 ac9 ac12">0 </TD><TD class=alignCenter headers="ar1 ar10 ac8 ac9 ac13">1 </TD><TD class=alignCenter headers="ar1 ar10 ac8 ac14">0 </TD></TR><TR><TH id=ar11 class=alignLeft headers=ar1>NL</TH><TD class=alignCenter headers="ar1 ar11 ac1 ac2 ac3">0 </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 ac7">0 </TD><TD class=alignCenter headers="ar1 ar11 ac8 ac9 ac10">1 </TD><TD class=alignCenter headers="ar1 ar11 ac8 ac9 ac11">0 </TD><TD class=alignCenter headers="ar1 ar11 ac8 ac9 ac12">0 </TD><TD class=alignCenter headers="ar1 ar11 ac8 ac9 ac13">1 </TD><TD class=alignCenter headers="ar1 ar11 ac8 ac14">0 </TD></TR><TR><TH id=ar12 class=alignLeft headers=ar1>Canada</TH><TD class=alignCenter headers="ar1 ar12 ac1 ac2 ac3">45 </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar12 ac1 ac2 ac4">0 </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar12 ac1 ac2 ac5">25 </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar12 ac1 ac2 ac6">20 </TD><TD class=alignCenter headers="ar1 ar12 ac1 ac7">5 </TD><TD class=alignCenter headers="ar1 ar12 ac8 ac9 ac10">129 </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar12 ac8 ac9 ac11">3 </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar12 ac8 ac9 ac12">81 </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar12 ac8 ac9 ac13">45 </TD><TD class=alignCenter headers="ar1 ar12 ac8 ac14">21 </TD></TR><TR><TH id=ar13 class=alignLeft headers=ar1>Percentage<SUP>2</SUP></TH><TD class=alignCenter headers="ar1 ar13 ac1 ac2 ac3">90.0% </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar13 ac1 ac2 ac4">0.0% </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar13 ac1 ac2 ac5">55.6% </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar13 ac1 ac2 ac6">44.4% </TD><TD class=alignCenter headers="ar1 ar13 ac1 ac7">10.0% </TD><TD class=alignCenter headers="ar1 ar13 ac8 ac9 ac10">86.0% </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar13 ac8 ac9 ac11">2.3% </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar13 ac8 ac9 ac12">62.8% </TD><TD class="bg-colour-blue alignCenter" headers="ar1 ar13 ac8 ac9 ac13">34.9% </TD><TD class=alignCenter headers="ar1 ar13 ac8 ac14">14.0% </TD></TR></TBODY></TABLE>
<TABLE id=t2 class=widthFull border=1 cellSpacing=0 cellPadding=2><CAPTION class=alignCenter>Table 2. Weekly and cumulative numbers of positive influenza specimens by type, subtype and age-group reported through case-based laboratory reporting<SUP>3</SUP>, Canada, 2014-15</CAPTION><THEAD><TR class=bg-colour-yellow><TH id=br1 rowSpan=3>Age groups (years)</TH><TH id=bc1 colSpan=5>Two weeks
(October 5 to October 11, 2014)
</TH><TH id=bc8 colSpan=7>Cumulative
(August 24 to October 11, 2014)
</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><TH id=bc15 colSpan=2 headers=bc8>Influenza A and B</TH></TR><TR class=bg-colour-grey-light><TH id=bc3 headers="bc1 bc2">A Total</TH><TH id=bc4 class="bg-colour-blue " headers="bc1 bc2">A(H1) pdm09</TH><TH id=bc5 class="bg-colour-blue " headers="bc1 bc2">A(H3)</TH><TH id=bc6 class="bg-colour-blue " headers="bc1 bc2">A (UnS)</TH><TD class=alignCenter headers="bc1 bc7">Total</TD><TH id=bc10 headers="bc8 bc9">A Total</TH><TH id=bc11 class="bg-colour-blue " headers="bc8 bc9">A(H1) pdm09</TH><TH id=bc12 class=bg-colour-blue headers="bc8 bc9">A(H3)</TH><TH id=bc13 class="bg-colour-blue " headers="bc8 bc9">A (UnS)</TH><TD class=alignCenter headers="bc8 bc14">Total</TD><TH id=bc16 headers="bc8 bc15">#</TH><TH id=bc17 headers="bc8 bc15">%</TH></TR></THEAD><TFOOT><TR><TD class=fontSize85 colSpan=13><SUP id=footnote_t2_1>1 </SUP>Specimens from NT, YT, and NU are sent to reference laboratories in other provinces. Cumulative data includes updates to previous weeks.
<SUP id=footnote_t2_2>2 </SUP>Percentage of tests positive for sub-types of influenza A are a percentage of all influenza A detections.
<SUP id=footnote_t2_3>3 </SUP>Table 2 includes specimens for which demographic information was reported. These represent a subset of all positive influenza cases reported.
UnS: unsubtyped: The specimen was typed as influenza A, but no result for subtyping was available.
</TD></TR></TFOOT><TBODY><TR><TH id=br2 class=alignLeft headers=br1><5</TH><TD class=alignCenter headers="br1 br2 bc1 bc2 bc3">4 </TD><TD class=alignCenter headers="br1 br2 bc1 bc2 bc4">0 </TD><TD class=alignCenter headers="br1 br2 bc1 bc2 bc5">2 </TD><TD class=alignCenter headers="br1 br2 bc1 bc2 bc6">2 </TD><TD class=alignCenter headers="br1 br2 bc1 bc7">2 </TD><TD class=alignCenter headers="br1 br2 bc8 bc9 bc10">11 </TD><TD class=alignCenter headers="br1 br2 bc8 bc9 bc11">2 </TD><TD class=alignCenter headers="br1 br2 bc8 bc9 bc12">5 </TD><TD class=alignCenter headers="br1 br2 bc8 bc9 bc13">4 </TD><TD class=alignCenter headers="br1 br2 bc8 bc14">7 </TD><TD class=alignCenter headers="br1 br2 bc8 bc15 bc16">18 </TD><TD class=alignCenter headers="br1 br2 bc8 bc15 bc17">12.3% </TD></TR><TR><TH id=br3 class=alignLeft headers=br1>5-19</TH><TD class=alignCenter headers="br1 br3 bc1 bc2 bc3">0 </TD><TD class=alignCenter headers="br1 br3 bc1 bc2 bc4">0 </TD><TD class=alignCenter headers="br1 br3 bc1 bc2 bc5">0 </TD><TD class=alignCenter headers="br1 br3 bc1 bc2 bc6">0 </TD><TD class=alignCenter headers="br1 br3 bc1 bc7">1 </TD><TD class=alignCenter headers="br1 br3 bc8 bc9 bc10">11 </TD><TD class=alignCenter headers="br1 br3 bc8 bc9 bc11">0 </TD><TD class=alignCenter headers="br1 br3 bc8 bc9 bc12">6 </TD><TD class=alignCenter headers="br1 br3 bc8 bc9 bc13">5 </TD><TD class=alignCenter headers="br1 br3 bc8 bc14">3 </TD><TD class=alignCenter headers="br1 br3 bc8 bc15 bc16">14 </TD><TD class=alignCenter headers="br1 br3 bc8 bc15 bc17">9.6% </TD></TR><TR><TH id=br4 class=alignLeft headers=br1>20-44</TH><TD class=alignCenter headers="br1 br4 bc1 bc2 bc3">1 </TD><TD class=alignCenter headers="br1 br4 bc1 bc2 bc4">0 </TD><TD class=alignCenter headers="br1 br4 bc1 bc2 bc5">1 </TD><TD class=alignCenter headers="br1 br4 bc1 bc2 bc6">0 </TD><TD class=alignCenter headers="br1 br4 bc1 bc7">0 </TD><TD class=alignCenter headers="br1 br4 bc8 bc9 bc10">9 </TD><TD class=alignCenter headers="br1 br4 bc8 bc9 bc11">0 </TD><TD class=alignCenter headers="br1 br4 bc8 bc9 bc12">1 </TD><TD class=alignCenter headers="br1 br4 bc8 bc9 bc13">8 </TD><TD class=alignCenter headers="br1 br4 bc8 bc14">1 </TD><TD class=alignCenter headers="br1 br4 bc8 bc15 bc16">10 </TD><TD class=alignCenter headers="br1 br4 bc8 bc15 bc17">6.8% </TD></TR><TR><TH id=br5 class=alignLeft headers=br1>45-64</TH><TD class=alignCenter headers="br1 br5 bc1 bc2 bc3">4 </TD><TD class=alignCenter headers="br1 br5 bc1 bc2 bc4">0 </TD><TD class=alignCenter headers="br1 br5 bc1 bc2 bc5">1 </TD><TD class=alignCenter headers="br1 br5 bc1 bc2 bc6">3 </TD><TD class=alignCenter headers="br1 br5 bc1 bc7">0 </TD><TD class=alignCenter headers="br1 br5 bc8 bc9 bc10">16 </TD><TD class=alignCenter headers="br1 br5 bc8 bc9 bc11">0 </TD><TD class=alignCenter headers="br1 br5 bc8 bc9 bc12">5 </TD><TD class=alignCenter headers="br1 br5 bc8 bc9 bc13">11 </TD><TD class=alignCenter headers="br1 br5 bc8 bc14">6 </TD><TD class=alignCenter headers="br1 br5 bc8 bc15 bc16">22 </TD><TD class=alignCenter headers="br1 br5 bc8 bc15 bc17">15.1% </TD></TR><TR><TH id=br6 class=alignLeft headers=br1>65+</TH><TD class=alignCenter headers="br1 br6 bc1 bc2 bc3">14 </TD><TD class=alignCenter headers="br1 br6 bc1 bc2 bc4">0 </TD><TD class=alignCenter headers="br1 br6 bc1 bc2 bc5">4 </TD><TD class=alignCenter headers="br1 br6 bc1 bc2 bc6">10 </TD><TD class=alignCenter headers="br1 br6 bc1 bc7">1 </TD><TD class=alignCenter headers="br1 br6 bc8 bc9 bc10">78 </TD><TD class=alignCenter headers="br1 br6 bc8 bc9 bc11">1 </TD><TD class=alignCenter headers="br1 br6 bc8 bc9 bc12">38 </TD><TD class=alignCenter headers="br1 br6 bc8 bc9 bc13">39 </TD><TD class=alignCenter headers="br1 br6 bc8 bc14">4 </TD><TD class=alignCenter headers="br1 br6 bc8 bc15 bc16">82 </TD><TD class=alignCenter headers="br1 br6 bc8 bc15 bc17">56.2% </TD></TR><TR><TH id=br7 class=alignLeft headers=br1>Unknown</TH><TD class=alignCenter headers="br1 br7 bc1 bc2 bc3">0 </TD><TD class=alignCenter headers="br1 br7 bc1 bc2 bc4">0 </TD><TD class=alignCenter headers="br1 br7 bc1 bc2 bc5">0 </TD><TD class=alignCenter headers="br1 br7 bc1 bc2 bc6">0 </TD><TD class=alignCenter headers="br1 br7 bc1 bc7">0 </TD><TD class=alignCenter headers="br1 br7 bc8 bc9 bc10">0 </TD><TD class=alignCenter headers="br1 br7 bc8 bc9 bc11">0 </TD><TD class=alignCenter headers="br1 br7 bc8 bc9 bc12">0 </TD><TD class=alignCenter headers="br1 br7 bc8 bc9 bc13">0 </TD><TD class=alignCenter headers="br1 br7 bc8 bc14">0 </TD><TD class=alignCenter headers="br1 br7 bc8 bc15 bc16">0 </TD><TD class=alignCenter headers="br1 br7 bc8 bc15 bc17">0.0% </TD></TR><TR><TH id=br8 class=alignLeft headers=br1>Total</TH><TD class=alignCenter headers="br1 br8 bc1 bc2 bc3">23 </TD><TD class="bg-colour-blue alignCenter" headers="br1 br8 bc1 bc2 bc4">0 </TD><TD class="bg-colour-blue alignCenter" headers="br1 br8 bc1 bc2 bc5">8 </TD><TD class="bg-colour-blue alignCenter" headers="br1 br8 bc1 bc2 bc6">15 </TD><TD class=alignCenter headers="br1 br8 bc1 bc7">4 </TD><TD class=alignCenter headers="br1 br8 bc8 bc9 bc10">125 </TD><TD class="bg-colour-blue alignCenter" headers="br1 br8 bc8 bc9 bc11">3 </TD><TD class="bg-colour-blue alignCenter" headers="br1 br8 bc8 bc9 bc12">55 </TD><TD class="bg-colour-blue alignCenter" headers="br1 br8 bc8 bc9 bc13">67 </TD><TD class=alignCenter headers="br1 br8 bc8 bc14">21 </TD><TD class=alignCenter headers="br1 br8 bc8 bc15 bc16">146 </TD><TD class=alignCenter headers="br1 br8 bc8 bc15 bc17">100.0% </TD></TR><TR><TH id=br9 class=alignLeft headers=br1>Percentage<SUP>2</SUP></TH><TD class=alignCenter headers="br1 br9 bc1 bc2 bc3">85.2% </TD><TD class="bg-colour-blue alignCenter" headers="br1 br9 bc1 bc2 bc4">0.0% </TD><TD class="bg-colour-blue alignCenter" headers="br1 br9 bc1 bc2 bc5">34.8% </TD><TD class="bg-colour-blue alignCenter" headers="br1 br9 bc1 bc2 bc6">65.2% </TD><TD class=alignCenter headers="br1 br9 bc1 bc7">14.8% </TD><TD class=alignCenter headers="br1 br9 bc8 bc9 bc10">85.6% </TD><TD class="bg-colour-blue alignCenter" headers="br1 br9 bc8 bc9 bc11">2.4% </TD><TD class="bg-colour-blue alignCenter" headers="br1 br9 bc8 bc9 bc12">44.0% </TD><TD class="bg-colour-blue alignCenter" headers="br1 br9 bc8 bc9 bc13">53.6% </TD><TD class=alignCenter headers="br1 br9 bc8 bc14">14.4% </TD><TD class=alignCenter></TD><TD class=alignCenter></TD></TR></TBODY></TABLE>
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Influenza Strain Characterizations
During the 2014-2015 influenza season, the National Microbiology Laboratory (NML) has antigenically characterized 2 influenza viruses [one A(H3N2) and one influenza B]. Both viruses were similar to the strains recommended by the WHO for the 2014-15 seasonal influenza vaccine. (Figure 4).
Figure 4. Influenza strain characterizations, Canada, 2014-2015, N = 2
The NML receives a proportion of the number of influenza positive specimens from provincial laboratories for strain characterization and antiviral resistance testing. Characterization data reflect the results of haemagglutination inhibition (HAI) testing compared to the reference influenza strains recommended by WHO
.The recommended components for the 2014-2015 northern hemisphere trivalent influenza vaccine include: an A/California/7/2009(H1N1)pdm09-like virus, an A/Texas/50/2012 (H3N2)-like virus, and a B/Massachusetts/2/2012-like virus (Yamagata lineage). For quadrivalent vaccines, the addition of a B/Brisbane/60/2008-like virus is recommended.
Text equivalent for figure 4Influenza strain characterizations, Canada, 2013-2014, N =3
Antiviral Resistance
During the 2014-2015 influenza season, NML has tested 2 influenza viruses for resistance to oseltamivir and zanamivir and both were sensitive to both agents. The one influenza A virus tested for amantadine resistance was resistant (Table 3).
<TABLE class=widthFull border=1 cellSpacing=0 cellPadding=2><CAPTION>Table 3. Antiviral resistance by influenza virus type and subtype, Canada, 2014-15</CAPTION><THEAD><TR class=bg-colour-yellow><TH id=t3hc1 rowSpan=2>Virus type and subtype</TH><TH id=t3hc2 colSpan=2>Oseltamivir</TH><TH id=t3hc3 colSpan=2>Zanamivir</TH><TH id=t3hc4 colSpan=2>Amantadine</TH></TR><TR class=bg-colour-yellow><TH id=t3hc5 headers=t3hc2># tested</TH><TH id=t3hc6 headers=t3hc2># resistant (%)</TH><TH id=t3hc7 headers=t3hc3># tested</TH><TH id=t3hc8 headers=t3hc3># resistant (%)</TH><TH id=t3hc9 headers=t3hc4># tested</TH><TH id=t3hc10 headers=t3hc4># resistant (%)</TH></TR></THEAD><TFOOT><TR><TD class=fontSize85 colSpan=7><SUP>*</SUP> NA - not applicable</TD></TR></TFOOT><TBODY><TR><TH id=t3hr1 class="alignLeft bg-colour-blue" headers=t3hc1>A (H3N2)</TH><TD class=alignCenter headers="t3hr1 t3hc2 t3hc5">1</TD><TD class=alignCenter headers="t3hr1 t3hc2 t3hc6">0</TD><TD class=alignCenter headers="t3hr1 t3hc3 t3hc7">1</TD><TD class=alignCenter headers="t3hr1 t3hc3 t3hc8">0</TD><TD class=alignCenter headers="t3hr1 t3hc4 t3hc9">1</TD><TD class=alignCenter headers="t3hr1 t3hc4 t3hc10">1(100%)</TD></TR><TR><TH id=t3hr2 class="alignLeft bg-colour-blue" headers=t3hc1>A (H1N1)</TH><TD class=alignCenter headers="t3hr2 t3hc2 t3hc5">0</TD><TD class=alignCenter headers="t3hr2 t3hc2 t3hc6">0</TD><TD class=alignCenter headers="t3hr2 t3hc3 t3hc7">0</TD><TD class=alignCenter headers="t3hr2 t3hc3 t3hc8">0</TD><TD class=alignCenter headers="t3hr2 t3hc4 t3hc9">0</TD><TD class=alignCenter headers="t3hr2 t3hc4 t3hc10">0</TD></TR><TR><TH id=t3hr3 class="alignLeft bg-colour-blue" headers=t3hc1>B</TH><TD class=alignCenter headers="t3hr3 t3hc2 t3hc5">1</TD><TD class=alignCenter headers="t3hr3 t3hc2 t3hc6">0</TD><TD class=alignCenter headers="t3hr3 t3hc3 t3hc7">1</TD><TD class=alignCenter headers="t3hr3 t3hc3 t3hc8">0</TD><TD class=alignCenter headers="t3hr3 t3hc4 t3hc9">NA <SUP>*</SUP></TD><TD class=alignCenter headers="t3hr3 t3hc4 t3hc10">NA <SUP>*</SUP></TD></TR><TR><TH id=t3hr4 class="alignLeft bg-colour-blue" headers=t3hc1>TOTAL</TH><TD class=alignCenter headers="t3hr4 t3hc2 t3hc5">2</TD><TD class=alignCenter headers="t3hr4 t3hc2 t3hc6">0</TD><TD class=alignCenter headers="t3hr4 t3hc3 t3hc7">2</TD><TD class=alignCenter headers="t3hr4 t3hc3 t3hc8">0</TD><TD class=alignCenter headers="t3hr4 t3hc4 t3hc9">1</TD><TD class=alignCenter headers="t3hr4 t3hc4 t3hc10">1</TD></TR></TBODY></TABLE>
Influenza-like Illness (ILI) Consultation Rate
The national influenza-like-illness (ILI) consultation rate continued to increase, and was 31.6 per 1,000 consultations in week 41 (Figure 5). The rates since mid-June have been above the expected range for this time of year.
Figure 5. Influenza-like-illness (ILI) consultation rates by report week, compared to the 1996-97 through to 2012-13 seasons (with pandemic data suppressed), Canada, 2014-2015
Note: No data available for mean rate for weeks 19 to 39 for the 1996-1997 through 2002-2003 seasons. Delays in the reporting of data may cause data to change retrospectively. The calculation of the average ILI consultation rate over 17 seasons was aligned with influenza activity in each season. In BC, AB, and SK, data is compiled by a provincial sentinel surveillance program for reporting to FluWatch. The number of sentinel physicians in each province or territory is as follows: BC(21), AB(80), SK(11), MB(18), ON(169), QC(14), NB(29), NS(26), PE(4), NL(16), NU(1), NT(14), YT(13). Not all sentinel physicians report every week.
Text equivalent for figure 5Influenza-like-illness (ILI) consultation rates by report week, compared to the 1996-97 through to 2012-13 seasons (with pandemic data suppressed), Canada, 2013-2014
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Influenza Outbreak Surveillance
In week 41, one new outbreak of influenza B was reported in a long-term care facility (Figure 6).
Figure 6. Overall number of new influenza outbreaks by report week, Canada, 2014-2015
1 All provinces and territories except NU report outbreaks in long-term care facilities. All provinces and territories with the exception of NU and QC report outbreaks in hospitals. Outbreaks of influenza or influenza-like-illness in other facilities are reported to FluWatch but reporting varies between jurisdictions. Outbreak definitions are included at the end of the report.
Text equivalent for figure 6Overall number of new influenza outbreaks by report week, Canada, 2013-2014
Pharmacy Surveillance
During week 41, the proportion of prescriptions for antivirals was approximately 11 antiviral prescriptions per 100,000 total prescriptions, which is in keeping with previous seasons (Figure 7).
Figure 7. Proportion of prescription sales for influenza antivirals by age-group and week, Canada, 2014-15
Note: Pharmacy sales data are provided to the Public Health Agency of Canada by Rx Canada Inc. and sourced from major retail drug chains representing over 3,000 stores nationwide (excluding Nunavut) in 85% of Health Regions. Data provided include the number of new antiviral prescriptions (for Tamiflu and Relenza) and the total number of new prescriptions dispensed by Province/Territory and age group. Age-groups: Infant: 0-2y, Child: 2-18y; Adult: 19-64y, Senior: ≥65y.
Text equivalent for figure 7Proportion of prescription sales for influenza antivirals by age-group and week, Canada, 2013-14
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Sentinel Hospital Influenza Surveillance
Paediatric Influenza Hospitalizations and Deaths (IMPACT)
In week 41, two new laboratory-confirmed influenza-associated paediatric (≤16 years of age) hospitalizations were reported by the Immunization Monitoring Program Active (IMPACT) network (Figure 8a). To date this season, seven hospitalizations have been reported by the IMPACT network, all cases of influenza A, and four of the seven were A(H3N2) (Table 4). To date, two cases were admitted to the ICU (Figure 9a).
Note: The number of hospitalizations reported through IMPACT represents a subset of all influenza-associated paediatric hospitalizations in Canada. Delays in the reporting of data may cause data to change retrospectively.
Adult Influenza Hospitalizations and Deaths (PCIRN)
Surveillance of laboratory-confirmed influenza-associated adult (≥16 years of age) hospitalizations by the PHAC/CIHR Influenza Research Network (PCIRN) Serious Outcomes Surveillance (SOS) network has not yet begun for the 2014-15 season (Figure 8b).
Note: The number of hospitalizations reported through PCIRN represents a subset of all influenza-associated adult hospitalizations in Canada. Delays in the reporting of data may cause data to change retrospectively.
<TABLE class=widthFull border=1 cellSpacing=0 cellPadding=2><CAPTION id=t4 class=alignCenter>Table 4 - Cumulative numbers of paediatric hospitalizations with influenza reported by the IMPACT network, Canada, 2014-15</CAPTION><THEAD><TR class=bg-colour-yellow><TH id=dr1 rowSpan=3>Age groups </TH><TH id=dc1 colSpan=6>Cumulative (Aug. 24, 2014 to October 11, 2014) </TH></TR><TR class=bg-colour-yellow><TH id=dc2 colSpan=4 headers=dc1>Influenza A </TH><TH id=dc7 headers=dc1>B </TH><TH id=dc8 headers=dc1>Influenza A and B </TH></TR><TR class=bg-colour-grey-light><TH id=dc3 headers="dc1 dc2">A Total </TH><TH id=dc4 class=bg-colour-blue headers="dc1 dc2">A(H1) pdm09 </TH><TH id=dc5 class=bg-colour-blue headers="dc1 dc2">A(H3) </TH><TH id=dc6 class=bg-colour-blue headers="dc1 dc2">A (UnS) </TH><TD class=alignCenter headers="dc1 dc7">Total</TD><TD class=alignCenter headers="dc1 dc8"># (%)</TD></TR></THEAD><TFOOT><TR><TD class=fontSize85 colSpan=7><SUP id=footnote_t4_1>1</SUP> Percentage of tests positive for sub-types of influenza A are a percentage of all influenza A detections.
UnS: unsubtyped: The specimen was typed as influenza A, but no result for subtyping was available.
</TD></TR></TFOOT><TBODY><TR><TH id=dr2 class=alignLeft headers=dr1>0-5m </TH><TD class=alignCenter headers="dr1 dr2 dc1 dc2 dc3">0 </TD><TD class=alignCenter headers="dr1 dr2 dc1 dc2 dc4">0</TD><TD class=alignCenter headers="dr1 dr2 dc1 dc2 dc5">0 </TD><TD class=alignCenter headers="dr1 dr2 dc1 dc2 dc6">0</TD><TD class=alignCenter headers="dr1 dr2 dc1 dc7">0</TD><TD class=alignCenter headers="dr1 dr2 dc1 dc8">0(0%)</TD></TR><TR><TH id=dr3 class=alignLeft headers=dr1>6-23m </TH><TD class=alignCenter headers="dr1 dr3 dc1 dc2 dc3">2 </TD><TD class=alignCenter headers="dr1 dr3 dc1 dc2 dc4">1</TD><TD class=alignCenter headers="dr1 dr3 dc1 dc2 dc5">1</TD><TD class=alignCenter headers="dr1 dr3 dc1 dc2 dc6">0</TD><TD class=alignCenter headers="dr1 dr3 dc1 dc7">0</TD><TD class=alignCenter headers="dr1 dr3 dc1 dc8">2(29%)</TD></TR><TR><TH id=dr4 class=alignLeft headers=dr1>2-4y </TH><TD class=alignCenter headers="dr1 dr4 dc1 dc2 dc3">3</TD><TD class=alignCenter headers="dr1 dr4 dc1 dc2 dc4">0</TD><TD class=alignCenter headers="dr1 dr4 dc1 dc2 dc5">1</TD><TD class=alignCenter headers="dr1 dr4 dc1 dc2 dc6">2</TD><TD class=alignCenter headers="dr1 dr4 dc1 dc7">0</TD><TD class=alignCenter headers="dr1 dr4 dc1 dc8">3(43%)</TD></TR><TR><TH id=dr5 class=alignLeft headers=dr1>5-9y </TH><TD class=alignCenter headers="dr1 dr5 dc1 dc2 dc3">1</TD><TD class=alignCenter headers="dr1 dr5 dc1 dc2 dc4">0</TD><TD class=alignCenter headers="dr1 dr5 dc1 dc2 dc5">1</TD><TD class=alignCenter headers="dr1 dr5 dc1 dc2 dc6">0</TD><TD class=alignCenter headers="dr1 dr5 dc1 dc7">0</TD><TD class=alignCenter headers="dr1 dr5 dc1 dc8">1(14%)</TD></TR><TR><TH id=dr6 class=alignLeft headers=dr1>10-16y </TH><TD class=alignCenter headers="dr1 dr6 dc1 dc2 dc3">1</TD><TD class=alignCenter headers="dr1 dr6 dc1 dc2 dc4">0</TD><TD class=alignCenter headers="dr1 dr6 dc1 dc2 dc5">1</TD><TD class=alignCenter headers="dr1 dr6 dc1 dc2 dc6">0</TD><TD class=alignCenter headers="dr1 dr6 dc1 dc7">0</TD><TD class=alignCenter headers="dr1 dr6 dc1 dc8">1(14%)</TD></TR><TR><TH id=dr7 class=alignLeft headers=dr1>Total </TH><TD class=alignCenter headers="dr1 dr7 dc1 dc2 dc3">7</TD><TD class="bg-colour-blue alignCenter" headers="dr1 dr7 dc1 dc2 dc4">1</TD><TD class="bg-colour-blue alignCenter" headers="dr1 dr7 dc1 dc2 dc5">4</TD><TD class="bg-colour-blue alignCenter" headers="dr1 dr7 dc1 dc2 dc6">2</TD><TD class=alignCenter headers="dr1 dr7 dc1 dc7">0</TD><TD class=alignCenter headers="dr1 dr7 dc1 dc8">7</TD></TR><TR><TH id=dr8 class=alignLeft headers=dr1>% <SUP>1</SUP></TH><TD class=alignCenter headers="dr1 dr8 dc1 dc2 dc3">100.0% </TD><TD class="bg-colour-blue alignCenter" headers="dr1 dr8 dc1 dc2 dc4">14.3% </TD><TD class="bg-colour-blue alignCenter" headers="dr1 dr8 dc1 dc2 dc5">57.1% </TD><TD class="bg-colour-blue alignCenter" headers="dr1 dr8 dc1 dc2 dc6">28.6% </TD><TD class=alignCenter headers="dr1 dr8 dc1 dc7">0.0% </TD><TD class=alignCenter headers="dr1 dr8 dc1 dc8">100.0% </TD></TR></TBODY></TABLE>
Table 5 - Cumulative numbers of adult hospitalizations with influenza reported by the PCIRN-SOS network, Canada, 2014-15
PCIRN-SOS surveillance for the 2014-15 season has not yet begun.
<!-- <table cellspacing="0" cellpadding="2" border="1" class="widthFull"> <caption class="alignCenter"> Table 5 - Cumulative numbers of adult hospitalizations with influenza reported by the PCIRN-SOS network, Canada, 2014-15 </caption> <thead> <tr class="bg-colour-yellow"> <th rowspan="3" id="er1">Age groups </th> <th id="ec1" colspan="6" class="noWrap">Cumulative (data not yet available for 2014-15)<sup>*</sup></th> </tr> <tr class="bg-colour-yellow"> <th colspan="4" id="ec2" headers="ec1">Influenza A </th> <th id="ec7" headers="ec1">B </th> <th id="ec8" headers="ec1">Influenza A and B </th> </tr> <tr class="bg-colour-grey-light"> <th id="ec3" headers="ec1 ec2">A Total </th> <th id="ec4" class="bg-colour-blue" headers="ec1 ec2">A(H1) pdm09 </th> <th id="ec5" class="bg-colour-blue" headers="ec1 ec2">A(H3) </th> <th id="ec6" class="bg-colour-blue" headers="ec1 ec2">A(UnS) </th> <td class="alignCenter" headers="ec1 ec7">Total</td> <td class="alignCenter" headers="ec1 ec8"># (%)</td> </tr> </thead> <tfoot> <tr> <td colspan="7" class="fontSize85"><sup id="footnote_t5_1">1</sup> Percentage of tests positive for sub-types of influenza A are a percentage of all influenza A detections.
UnS: unsubtyped: The specimen was typed as influenza A, but no result for subtyping was available.
<sup id="t5_star">*</sup>Two cases for which the influenza type has not yet been reported, and four cases for which the age-group was not reported, are not included in Table 5.</td> </tr> </tfoot> <tbody> <tr> <th id="er2" class="alignLeft" headers="er1">16-20 </th> <td class="alignCenter" headers="er1 er2 ec1 ec2 ec3"> 0</td> <td class="alignCenter" headers="er1 er2 ec1 ec2 ec4"> 0</td> <td class="alignCenter" headers="er1 er2 ec1 ec2 ec5"> 0</td> <td class="alignCenter" headers="er1 er2 ec1 ec2 ec6"> 0</td> <td class="alignCenter" headers="er1 er2 ec1 ec7"> 0</td> <td class="alignCenter" headers="er1 er2 ec1 ec8"> 0</td> </tr> <tr> <th id="er3" class="alignLeft" headers="er1">20-44 </th> <td class="alignCenter" headers="er1 er3 ec1 ec2 ec3"> 0</td> <td class="alignCenter" headers="er1 er3 ec1 ec2 ec4"> 0</td> <td class="alignCenter" headers="er1 er3 ec1 ec2 ec5"> 0</td> <td class="alignCenter" headers="er1 er3 ec1 ec2 ec6"> 0</td> <td class="alignCenter" headers="er1 er3 ec1 ec7"> 0</td> <td class="alignCenter" headers="er1 er3 ec1 ec8"> 0</td> </tr> <tr> <th id="er4" class="alignLeft" headers="er1">45-64 </th> <td class="alignCenter" headers="er1 er4 ec1 ec2 ec3"> 0</td> <td class="alignCenter" headers="er1 er4 ec1 ec2 ec4"> 0</td> <td class="alignCenter" headers="er1 er4 ec1 ec2 ec5"> 0</td> <td class="alignCenter" headers="er1 er4 ec1 ec2 ec6"> 0</td> <td class="alignCenter" headers="er1 er4 ec1 ec7"> 0</td> <td class="alignCenter" headers="er1 er4 ec1 ec8"> 0</td> </tr> <tr> <th id="er5" class="alignLeft" headers="er1">65+ </th> <td class="alignCenter" headers="er1 er5 ec1 ec2 ec3"> 0</td> <td class="alignCenter" headers="er1 er5 ec1 ec2 ec4"> 0</td> <td class="alignCenter" headers="er1 er5 ec1 ec2 ec5"> 0</td> <td class="alignCenter" headers="er1 er5 ec1 ec2 ec6"> 0</td> <td class="alignCenter" headers="er1 er5 ec1 ec7"> 0</td> <td class="alignCenter" headers="er1 er5 ec1 ec8"> 0</td> </tr> <tr> <th id="er6" class="alignLeft" headers="er1">Total </th> <td class="alignCenter" headers="er1 er6 ec1 ec2 ec3"> 0</td> <td class="bg-colour-blue alignCenter" headers="er1 er6 ec1 ec2 ec4"> 0</td> <td class="bg-colour-blue alignCenter" headers="er1 er6 ec1 ec2 ec5"> 0</td> <td class="bg-colour-blue alignCenter" headers="er1 er6 ec1 ec2 ec6"> 0</td> <td class="alignCenter" headers="er1 er6 ec1 ec7"> 0</td> <td class="alignCenter" headers="er1 er6 ec1 ec8"> 0</td> </tr> <tr> <th id="er7" class="alignLeft" headers="er1">% <sup>1</sup> </th> <td class="alignCenter" headers="er1 er7 ec1 ec2 ec3"> 0</td> <td class="bg-colour-blue alignCenter" headers="er1 er7 ec1 ec2 ec4"> 0</td> <td class="bg-colour-blue alignCenter" headers="er1 er7 ec1 ec2 ec5"> 0</td> <td class="bg-colour-blue alignCenter" headers="er1 er7 ec1 ec2 ec6"> 0</td> <td class="alignCenter" headers="er1 er7 ec1 ec7"> 0</td> <td class="alignCenter" headers="er1 er7 ec1 ec8"> 0</td> </tr> </tbody> </table>-->Figure 8 - Number of cases of influenza reported by sentinel hospital networks, by week, Canada, 2014-15
A) Paediatric hospitalizations (≤16 years of age, IMPACT)
Text equivalent for figure 8aNumber of cases of influenza reported by sentinel hospital networks, by week, Canada, 2013-14: Paediatric hospitalizations (≤16 years of age, IMPACT)
B) Adult hospitalizations (≥16 year of age, PCIRN-SOS)
* See footnote above following the section related to PCIRN-SOS data.
<!-- Text equivalent for figure 8bNumber of cases of influenza reported by sentinel hospital networks, by week, Canada, 2013-14: Adult hospitalizations (>16 year of age, PCIRN-SOS)
-->Figure 9 - Percentage of hospitalizations, ICU admissions and deaths with influenza reported by age-group, Canada, 2014-15
A) Paediatric hospitalizations (≤16 years of age, IMPACT)
Text equivalent for figure 9aPercentage of hospitalizations, ICU admissions and deaths with influenza reported by age-group, Canada, 2013-14: Paediatric hospitalizations (≤16 years of age, IMPACT)
B) Adult hospitalizations (≥16 year of age, PCIRN-SOS)
<!-- Text equivalent for figure 9bPercentage of hospitalizations, ICU admissions and deaths with influenza reported by age-group, Canada, 2013-14: Adult hospitalizations (≥16 year of age, PCIRN-SOS)
-->
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Provincial/Territorial Influenza Hospitalizations and Deaths
Since the start of the 2014-15 season, 25 laboratory-confirmed influenza-associated hospitalizations have been reported from participating provinces and territories*; 24 were cases of influenza A, of which the majority were A(H3N2); 56% were patients ≥65 years of age. No ICU admissions were reported. Two deaths with influenza A(H3N2) have been reported in adults ≥45 years of age. There is a reporting delay from some regions that have not yet begun surveillance and/or submission of weekly reports.
* Note: Influenza-associated hospitalizations are not reported to PHAC by the following Provinces and Territory: BC, NU, QC, and NB. Only hospitalizations that require intensive medical care are reported by Saskatchewan. ICU admissions are not distinguished among hospital admissions reported from Ontario. Data may also include cases reported by the IMPACT and PCIRN networks.
<TABLE id=t6 class=widthFull border=1 cellSpacing=0 cellPadding=2><CAPTION class=alignCenter>Table 6. Cumulative number of hospitalizations with influenza reported by the participating provinces and territories, Canada, 2013-14</CAPTION><THEAD><TR class=bg-colour-yellow><TH id=fr1 rowSpan=3>Age groups </TH><TH id=fc1 colSpan=6>Cumulative (24 August 2014 to 11 October 2014)</TH></TR><TR class=bg-colour-yellow><TH id=fc2 colSpan=4 headers=fc1>Influenza A </TH><TH id=fc7 headers=fc1>B </TH><TH id=fc8 headers=fc1>Influenza A and B </TH></TR><TR class=bg-colour-grey-light><TH id=fc3 headers="fc1 fc2">A Total </TH><TH id=fc4 class=bg-colour-blue headers="fc1 fc2">A(H1) pdm09 </TH><TH id=fc5 class=bg-colour-blue headers="fc1 fc2">A(H3) </TH><TH id=fc6 class=bg-colour-blue headers="fc1 fc2">A (UnS) </TH><TD class=alignCenter headers="fc1 fc7">Total</TD><TD class=alignCenter headers="fc1 fc8"># (%)</TD></TR></THEAD><TFOOT><TR><TD class=fontSize85 colSpan=8><SUP>1</SUP> Percentage of tests positive for sub-types of influenza A are a percentage of all influenza A detections.
UnS: unsubtyped: The specimen was typed as influenza A, but no result for subtyping was available.
</TD></TR></TFOOT><TBODY><TR><TH id=fr2 class=alignLeft headers=fr1>0-4 years </TH><TD class=alignCenter headers="fr1 fr2 fc1 fc2 fc3">2 </TD><TD class=alignCenter headers="fr1 fr2 fc1 fc2 fc4">0 </TD><TD class=alignCenter headers="fr1 fr2 fc1 fc2 fc5">1 </TD><TD class=alignCenter headers="fr1 fr2 fc1 fc2 fc6">1 </TD><TD class=alignCenter headers="fr1 fr2 fc1 fc7">0 </TD><TD class=alignCenter headers="fr1 fr2 fc1 fc8">2 (8%) </TD></TR><TR><TH id=fr3 class=alignLeft headers=fr1>5-19 years </TH><TD class=alignCenter headers="fr1 fr3 fc1 fc2 fc3">3 </TD><TD class=alignCenter headers="fr1 fr3 fc1 fc2 fc4">0 </TD><TD class=alignCenter headers="fr1 fr3 fc1 fc2 fc5">3 </TD><TD class=alignCenter headers="fr1 fr3 fc1 fc2 fc6">0 </TD><TD class=alignCenter headers="fr1 fr3 fc1 fc7">0 </TD><TD class=alignCenter headers="fr1 fr3 fc1 fc8">3 (12%) </TD></TR><TR><TH id=fr4 class=alignLeft headers=fr1>20-44 years </TH><TD class=alignCenter headers="fr1 fr4 fc1 fc2 fc3">1</TD><TD class=alignCenter headers="fr1 fr4 fc1 fc2 fc4">1</TD><TD class=alignCenter headers="fr1 fr4 fc1 fc2 fc5">0</TD><TD class=alignCenter headers="fr1 fr4 fc1 fc2 fc6">0 </TD><TD class=alignCenter headers="fr1 fr4 fc1 fc7">0</TD><TD class=alignCenter headers="fr1 fr4 fc1 fc8">1 (4%) </TD></TR><TR><TH id=fr5 class=alignLeft headers=fr1>45-64 years </TH><TD class=alignCenter headers="fr1 fr5 fc1 fc2 fc3">4</TD><TD class=alignCenter headers="fr1 fr5 fc1 fc2 fc4">0 </TD><TD class=alignCenter headers="fr1 fr5 fc1 fc2 fc5">4</TD><TD class=alignCenter headers="fr1 fr5 fc1 fc2 fc6">0 </TD><TD class=alignCenter headers="fr1 fr5 fc1 fc7">1</TD><TD class=alignCenter headers="fr1 fr5 fc1 fc8">5(20%) </TD></TR><TR><TH id=fr6 class=alignLeft headers=fr1>65+ years </TH><TD class=alignCenter headers="fr1 fr6 fc1 fc2 fc3">14</TD><TD class=alignCenter headers="fr1 fr6 fc1 fc2 fc4">0 </TD><TD class=alignCenter headers="fr1 fr6 fc1 fc2 fc5">9</TD><TD class=alignCenter headers="fr1 fr6 fc1 fc2 fc6">5</TD><TD class=alignCenter headers="fr1 fr6 fc1 fc7">0 </TD><TD class=alignCenter headers="fr1 fr6 fc1 fc8">14 (56%) </TD></TR><TR><TH id=fr7 class=alignLeft headers=fr1>Unknown</TH><TD class=alignCenter headers="fc1 fr7 fc2 fc3">0</TD><TD class=alignCenter headers="fc1 fr7 fc2 fc4">0</TD><TD class=alignCenter headers="fc1 fr7 fc2 fc5">0</TD><TD class=alignCenter headers="fc1 fr7 fc2 fc6">0</TD><TD class=alignCenter headers="fc1 fr7 fc7">0 </TD><TD class=alignCenter headers="fc1 fr7 fc8">0 (0%) </TD></TR><TR><TH id=fr8 class=alignLeft headers=fr1>Total </TH><TD class=alignCenter headers="fr1 fr8 fc1 fc2 fc3">24 </TD><TD class="bg-colour-blue alignCenter" headers="fr1 fr8 fc1 fc2 fc4">1 </TD><TD class="bg-colour-blue alignCenter" headers="fr1 fr8 fc1 fc2 fc5">17 </TD><TD class="bg-colour-blue alignCenter" headers="fr1 fr8 fc1 fc2 fc6">6 </TD><TD class=alignCenter headers="fr1 fr8 fc1 fc7">1 </TD><TD class=alignCenter headers="fr1 fr8 fc1 fc8">25 </TD></TR><TR><TH id=fr9 class=alignLeft headers=fr1>Percentage <SUP>1</SUP></TH><TD class=alignCenter headers="fr1 fr9 fc1 fc2 fc3">96.0% </TD><TD class="bg-colour-blue alignCenter" headers="fr1 fr9 fc1 fc2 fc4">4.2% </TD><TD class="bg-colour-blue alignCenter" headers="fr1 fr9 fc1 fc2 fc5">70.8% </TD><TD class="bg-colour-blue alignCenter" headers="fr1 fr9 fc1 fc2 fc6">25.0% </TD><TD class=alignCenter headers="fr1 fr9 fc1 fc7">4.0% </TD><TD class=alignCenter headers="fr1 fr9 fc1 fc8">100.0% </TD></TR></TBODY></TABLE>
See additional data on Reported Influenza Hospitalizations and Deaths in Canada: 2009-10 to 2014-15 on the Public Health Agency of Canada website.
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