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Text Equivalents - 2012-2013 FluWatch report: January 6 to January 12, 2013 (Week 2)

Figure 1: Map of overall Influenza activity level by province and territory, Canada, Week 2

In week 02, 15 regions [in BC(2), AB(2), ON(5), QC(3) and NL(3)] reported widespread activity and 25 regions [in BC(2), AB(3), SK(2), MB(4), ON(2), QC(2), NB(5), NS(3), NL(1) and NU(1)] reported localized activity.

Return to the Figure 1: Map of overall Influenza activity level by province and territory, Canada, Week 2

Figure 2: Number of influenza surveillance regions reporting widespread or localized activity, Canada, by report week, 2012-2013

In week 02, 15 regions reported widespread activity and 25 regions reported localized activity.

Return to the Figure 2: Number of influenza surveillance regions reporting widespread or localized activity, Canada, by report week, 2012-2013

Figure 3: Overall number of influenza outbreaks, Canada, by report week, 2012-2013

In week 02, 130 new influenza outbreaks were reported: 98 in long-term-care facilities, 2 in hospitals, 5 in schools, and 25 in other facilities or communities.

Return to the Figure 3: Overall number of influenza outbreaks, Canada, by report week, 2012-2013

Figure 4: Influenza tests reported and percentage of tests positive, Canada, by report week, 2012-2013

The percentage of positive influenza tests decreased from 32.5% in week 01 to 30.7% in week 02.

Return to the Figure 4: Influenza tests reported and percentage of tests positive, Canada, by report week, 2012-2013

Figure 5: Percent positive influenza tests, compared to other respiratory viruses, Canada, by reporting week, 2012-2013

The percentage of positive influenza tests decreased from 32.5% in week 01 to 30.7% in week 02. The percentage of tests positive for RSV was similar to week 01 (10.7%) at 10.4% in week 02. The percentage of tests positive for rhinovirus (3.9%), parainfluenza (2.3%), and coronavirus (3.6%) each increased slightly compared to the previous week. Other percentages of positive tests remained low in week 02: adenovirus 0.7%; hMPV 1.0%.

Return to the Figure 5: Percent positive influenza tests, compared to other respiratory viruses, Canada, by reporting week, 2012-2013

Figure 6: Influenza strain characterizations, Canada, 2011-2012

During the 2012-13 season, the National Microbiology Laboratory (NML) has antigenically characterized 248 influenza viruses [172 A(H3N2), 36 A(H1N1)pdm09 , and 40 influenza B]. The 172 influenza A(H3N2) viruses were antigenically similar to the vaccine strain A/Victoria/361/2011 and the 36 A(H1N1)pdm09 viruses were antigenically similar to the vaccine strain A/California/07/09. Among the influenza B viruses, 31 were antigenically similar to the vaccine strain B/Wisconsin/01/2010 (Yamagata lineage) and 9 were similar to B/Brisbane/60/2008 (Victoria lineage; component of the 2011-2012 seasonal influenza vaccine).

Return to the Figure 6: Influenza strain characterizations, Canada, 2011-2012

Figure 7: Influenza-like illness (ILI) consultation rates, Canada, by report week, 2012-2013 compared to 1996/97 through to 2011/12 seasons

The national influenza-like-illness (ILI) consultation rate increased from 58.7 ILI consultations per 1,000 patient visits in week 01 to 62.1 in week 02. This rate is well above the expected level for this time of year, which is between 24.0 and 42.5 ILI consultations per 1,000 visits.

Return to the Figure 7: Influenza-like illness (ILI) consultation rates, Canada, by report week, 2012-2013 compared to 1996/97 through to 2011/12 seasons