British Columbia Influenza Surveillance Bulletin 2011-12 Weeks 17-36 (Sep 21, 2012)

[Pathfinder]

Re: British Columbia Influenza Surveillance Bulletin 2011-12 Week 16

BRITISH COLUMBIA INFLUENZA SURVEILLANCE BULLETIN
2011-12: Number 16, Week 16
April 15 to 21, 2012

Prepared by BCCDC Influenza &
Emerging Respiratory Pathogens Team

Continued low-level influenza activity in BC

Summary

In week 16 (April 15-21, 2012), most influenza surveillance indicators suggested that influenza activity continues at low levels in BC. The proportion of patients with influenza-like illness among those presenting to sentinel physicians was 0.20%, similar to previous weeks and within the expected range for this time of year. Throughout the province, influenza illness as a proportion of all submitted BC MSP claims remained at or below the 10-year median for this time of year. In week 16, no lab-confirmed influenza outbreaks were reported; one has been reported in week 17 (influenza A, subtype pending). Of the one hundred and six specimens tested at the BC Public Health Microbiology & Reference Laboratory, PHSA, during this period, 18 (17.0%) were positive for influenza, including 8 (7.5%) influenza A/H3N2, 3 (2.8%) A(H1N1)pdm09, 2 (1.9%) influenza A (subtype pending), and 5 (4.7%) influenza B. Other significant respiratory virus detections included rhino/enterovirus (13/106, 12.3%), respiratory syncytial virus (12/106, 11.3%), and human bocavirus (8/106, 7.5%). Other respiratory viruses were also sporadically detected. RSV increased and continued to dominate among the respiratory viruses detected at BC Children?s Hospital.

Full report:

http://www.bccdc.ca/NR/rdonlyres/E59F7A6A-8486-4E39-BE1A-625C81F3BABE/0/InfluBulletin_Number16_Week16_201112.pdf

[Pathfinder]

Re: British Columbia Influenza Surveillance Bulletin 2011-12 Weeks 17-36 (Sep 21, 2012)

Sep 21, 2012 [PDF 381 KB]

BRITISH COLUMBIA INFLUENZA SURVEILLANCE BULLETIN
2011-12: Number 17, Week 17-36
April 22 to September 8, 2012
Prepared by BCCDC Influenza &
Emerging Respiratory Pathogens Team

Expected low-level influenza activity in BC, Spring-summer 2012

Summary In advance of the upcoming 2012-13 influenza season we provide here an update and summary of influenza activity in BC over the 2012 spring-summer period. During weeks 17-36 (April 22 to September 8, 2012), influenza activity was at expected low levels in BC. The proportion of patients with influenza-like illness among those presenting to sentinel physicians was less than 0.15%, within the expected range for this time of year. Throughout the entire province, influenza illness as a proportion of all submitted BC MSP claims remained at or below the 10-year median for this time of year. One lab-confirmed influenza A/H3N2 outbreak was reported from a long term care facility in Fraser Health Authority in week 20 (i.e. week of May 13-19). Of the one thousand and thirty-eight specimens tested at the BC Public Health Microbiology & Reference Laboratory, PHSA, during this period, 73 (7.0%) were positive for influenza virus, including 48 influenza A/H3N2, 2 A(H1N1)pdm09, and 23 influenza B. While most of these were identified during weeks 17-26 (April 22 ? June 30), there have been two recent adult detections of influenza A/H3N2 (week 35 and 36, i.e. between August 12 and September 8). Other significant respiratory virus detections included rhino/enterovirus (230/1037, 22.2%). Other respiratory viruses were also sporadically detected.

Full report:

http://www.bccdc.ca/NR/rdonlyres/D662422C-4E20-4769-B76B-7C9D164B3AF3/0/InfluBulletin_Number17_Weeks1736_201112.pdf