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Influenza data for Canada (Up to July 18)

Mingus

Mingus

New member
http://www.phac-aspc.gc.ca/fluwatch/08-09/w25_09/index-eng.php

ILI consultation rate
This week, the ILI consultation rate was 34 consultations per 1,000 patient visits (see ILI graph) which represents a slight decrease relative to the two previous weeks. The sentinel response rate was 75.0%.

Influenza-like illness (ILI) consultation rates, Canada, by report week,
2008-2009 compared to 1996/97 through to 2007/08 seasons

2009-w25-fg3-eng.gif

flu0809-leg-fg3-eng.gif


Note: No data available for mean rate in previous years for weeks 19 to 39 (1996-1997 through 2002-2003 seasons).


Influenza tests reported and percentage of tests positive, Canada,
by report week, 2008-2009

2009-w25-fg4-eng.gif

flu0809-leg-fg4-eng.gif


Percent positive influenza tests, compared to other respiratory viruses, Canada, by reporting week, 2008-2009

2009-w25-fg5-eng.gif

flu0809-leg-fg5-eng.gif



Influenza Tests Received from Provincial Labs with subtyping capacity, Canada, 2008-2009

<table class="widthFull" border="1" cellpadding="2" cellspacing="0"> <tbody><tr class="bg-colour-blue"> <td rowspan="2" class="alignCenter">Reporting provinces</td> <td colspan="5" class="alignCenter">Influenza A</td> <td class="alignCenter">Influenza B</td> </tr> <tr class="bg-colour-blue"> <td class="alignCenter">Total</td> <td class="alignCenter">A(H1)</td> <td class="alignCenter">A(H3)</td> <td class="alignCenter">A(H1N1 flu virus)</td> <td class="alignCenter">A(not subtyped)</td> <td class="alignCenter"> </td> </tr> <tr> <th class="bg-colour-blue">BC</th> <td class="alignRight">1071</td> <td class="alignRight">9</td> <td class="alignRight">6</td> <td class="alignRight">152</td> <td class="alignRight">904</td> <td class="alignRight">210</td> </tr> <tr> <th class="bg-colour-blue">AB</th> <td class="alignRight">2198</td> <td class="alignRight">0</td> <td class="alignRight">8</td> <td class="alignRight">231</td> <td class="alignRight">1959</td> <td class="alignRight">466</td> </tr> <tr> <th class="bg-colour-blue">SK</th> <td class="alignRight">1163</td> <td class="alignRight">28</td> <td class="alignRight">78</td> <td class="alignRight">673</td> <td class="alignRight">384</td> <td class="alignRight">219</td> </tr> <tr> <th class="bg-colour-blue">MB</th> <td class="alignRight">850</td> <td class="alignRight">7</td> <td class="alignRight">35</td> <td class="alignRight">553</td> <td class="alignRight">255</td> <td class="alignRight">37</td> </tr> <tr> <th class="bg-colour-blue">ON</th> <td class="alignRight">5818</td> <td class="alignRight">144</td> <td class="alignRight">135</td> <td class="alignRight">2636</td> <td class="alignRight">2903</td> <td class="alignRight">1351</td> </tr> <tr> <th class="bg-colour-blue">QC</th> <td class="alignRight">3559</td> <td class="alignRight">0</td> <td class="alignRight">0</td> <td class="alignRight">0</td> <td class="alignRight">3559</td> <td class="alignRight">1415</td> </tr> <tr> <th class="bg-colour-blue">NB</th> <td class="alignRight">281</td> <td class="alignRight">3</td> <td class="alignRight">3</td> <td class="alignRight">4</td> <td class="alignRight">271</td> <td class="alignRight">95</td> </tr> <tr> <th class="bg-colour-blue">NS</th> <td class="alignRight">167</td> <td class="alignRight">23</td> <td class="alignRight">23</td> <td class="alignRight">64</td> <td class="alignRight">57</td> <td class="alignRight">60</td> </tr> <tr> <th class="bg-colour-blue">PE</th> <td class="alignRight">17</td> <td class="alignRight">3</td> <td class="alignRight">0</td> <td class="alignRight">0</td> <td class="alignRight">14</td> <td class="alignRight">9</td> </tr> <tr> <th class="bg-colour-blue">NL</th> <td class="alignRight">161</td> <td class="alignRight">11</td> <td class="alignRight">4</td> <td class="alignRight">23</td> <td class="alignRight">123</td> <td class="alignRight">26</td> </tr> <tr> <th class="bg-colour-blue">Canada</th> <td class="alignRight">15285</td> <td class="alignRight">228</td> <td class="alignRight">292</td> <td class="alignRight">4336</td> <td class="alignRight">10429</td> <td class="alignRight">3888</td> </tr> </tbody></table>

Antigenic Characterization
Since 1 September 2008, the NML has antigenically characterized 978 influenza viruses: 243 influenza A/Brisbane/59/2007(H1N1)-like (from BC, AB, SK, MB, ON, QC, NB, NS & PEI), 168 influenza A/Brisbane/10/2007(H3N2)-like (from BC, AB, SK, MB, ON, QC, NB, NS, PEI & NL), 11 influenza B/Florida/4/2006-like (from AB, ON, QC & NB), 177 B/Brisbane/60/2008-like (from BC, AB, SK, MB, ON, QC, NB, NL & NU) and 379 B/Malaysia/2506/2004-like (in all provinces except the Territories). A/Brisbane/59/2007(H1N1), A/Brisbane/10/2007(H3N2) and B/Florida/04/2006 are the influenza A and influenza B components recommended for the 2008-09 influenza vaccine. All influenza A isolates are a good match to this season?s influenza vaccine while only 11/567 (1.9%) of influenza B viruses match this season?s vaccine. As of 2 July, 2009 the NML tested 656 specimens for Pandemic (H1N1) 2009 virus and 364 were positive. Positive samples were from AB, SK, MB, ON, QC, NB, NS, PEI and NL.
*Provincial labs are also doing their own confirmation using RT-PCR.


Antiviral Resistance (from NML)
All Pandemic (H1N1) 2009 viruses tested so far have been sensitive to oseltamivir (208 samples) and zanamivir (91 samples) but resistant to amantadine (208 samples).
 
Re: Influenza data for Canada (Up to June 27)

Re: Influenza data for Canada (Up to June 27)

post peak
 
Re: Influenza data for Canada (Up to June 27)

Re: Influenza data for Canada (Up to June 27)

gsgs said:
post peak
Click to expand...
Data from 6/27 through today will tell whether it is going back up or continuing the downward trend. But there is an uptick between the last two reporting periods with a concurrent reduction in tests performed. I imagine the increase in % positive in the recent data could be the result of only testing severe cases, which would support your interpretation of them being post peak. However, since the data represent percent positive tests and the protocol for testing has changed, the pattern might be more sensitive to changes in protocol than to an actual reduction of infections. Time will tell.
 
Re: Influenza data for Canada (Up to June 27)

Re: Influenza data for Canada (Up to June 27)

Uptate up to July 4

http://www.phac-aspc.gc.ca/fluwatch/08-09/w26_09/index-eng.php

Influenza-like illness (ILI) consultation rates, Canada, by report week,
2008-2009 compared to 1996/97 through to 2007/08 seasons

2009-w26-fg3-eng.gif

Influenza tests reported and percentage of tests positive, Canada,
by report week, 2008-2009

2009-w26-fg4-eng.gif

flu0809-leg-fg4-eng.gif


Percent positive influenza tests, compared to other respiratory viruses, Canada, by reporting week, 2008-2009

2009-w26-fg5-eng.gif

flu0809-leg-fg5-eng.gif
 
Re: Influenza data for Canada (Up to July 04)

Re: Influenza data for Canada (Up to July 04)

Up to July 18



http://www.phac-aspc.gc.ca/fluwatch/08-09/w28_09/index-eng.php


Laboratory Surveillance Summary
This week, the proportion of tests that were positive for influenza was 11.3% which is decreasing for the fifth consecutive week (see table). The majority (81.9%) of influenza virus detections this season have been for influenza A. A total of 706 specimen tested positive for influenza this week (all influenza A). Of the 380 influenza A subtyped, 98.7% were due to Pandemic (H1N1) 2009, 1.0% to A(H1) virus and 0.3% to A(H3) virus.

Influenza tests reported and percentage of tests positive, Canada,
by report week, 2008-2009

2009-w28-fg4-eng.gif

flu0809-leg-fg4-eng.gif


Percent positive influenza tests, compared to other respiratory viruses, Canada, by reporting week, 2008-2009

2009-w28-fg5-eng.gif

flu0809-leg-fg5-eng.gif
 
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