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Alaska Influenza Surveillance Report

 Epidemiology

ALASKA STATE VIROLOGY LABORATORY (ASVL) CONFIRMED INFLUENZA

ASVL Laboratory-Confirmed Specimens (by PCR and Culture) by Week, 2011–12 WHO Isolates
Click figure to enlarge
Last Update: 05/16/2012


INFLUENZA CONFIRMED BY RAPID INFLUENZA DIAGNOSTIC TEST

Rapid Influenza Diagnostic Test Results by Week Updated 5/15/2012

A   B   A/B
30 most recent weeks

#
of
Cases




 		80
Influenza A; n=4
Influenza A; n=4
Influenza A; n=5
Influenza A; n=2
Influenza A; n=2
Influenza A; n=1
Influenza B; n=1Influenza A; n=1
Influenza A; n=3
Influenza A; n=1
Influenza A; n=3
Influenza B; n=3
Influenza B; n=2Influenza A; n=2
Influenza A; n=3
Influenza B; n=1Influenza A; n=9
Influenza B; n=5Influenza A; n=8
Influenza B; n=3Influenza A; n=6
Influenza B; n=2Influenza A; n=19
Influenza B; n=6Influenza A; n=25
Influenza B; n=12Influenza A; n=33
Influenza A/B; n=3Influenza B; n=19Influenza A; n=40
Influenza B; n=19Influenza A; n=42
Influenza B; n=32Influenza A; n=28
Influenza B; n=9Influenza A; n=17
Influenza B; n=15Influenza A; n=9
Influenza B; n=7Influenza A; n=9
72
64
56
48
40
32
24
16
8
  29 5 12 19 26 3 10 17 24 31 7 14 21 28 4 11 18 25 3 10 17 24 31 7 14 21 28 5 12 19
Oct
2011		 Nov
2011		 Dec
2011		 Jan
2012		 Feb
2012		 Mar
2012		 Apr
2012		 May
2012

Date by Week Ending


Rapid Influenza Diagnostic Test Results by Region Since
September 25, 2011

  No. Positive for Date of Positive Specimen*
Region Influenza A Influenza B Influenza A/B Influenza A Influenza B Influenza A/B
Latest Latest Latest
Anchorage/Mat-Su  204  43  4  05/14/2012   05/14/2012   04/13/2012 
Gulf Coast  39  40    05/07/2012   05/14/2012   
Interior  12  41    04/04/2012   05/14/2012   
Northern  4  1    05/10/2012   02/12/2012   
Southeast  14  7    05/08/2012   05/01/2012   
Southwest  7  4    05/09/2012   05/04/2012   
Statewide  281  136  4  05/14/2012   05/14/2012   04/13/2012 
Unknown  1      04/10/2012     
*Date of illness, date of specimen collection or date received at laboratory; other respiratory viruses are not included in this report.


INFLUENZA-LIKE ILLNESS (ILI)

Influenza-like Illness Surveillance

In Alaska, the percentage of influenza-like-illness (ILI) visits to sentinel providers for the week ending May 12, 2012 was 2.4%. Nationally, the percentage of ILI visits to sentinel providers for the week ending May 5, 2012 was 1.4%. The national baseline is 2.4%.
Updated 5/15/2012


Percentage of Visits for Influenza-like Illness reported by the US Outpatient Influenza-like Illness Surveillance Network (ILINet) in Alaska

Click figure to enlarge
Last Update: 05/16/2012


HISTORIC DATA

Seasonal Influenza Trends

Prepared by the Section of Epidemiology, based on data supplied by the State Virology Laboratory, Fairbanks, and other laboratories. Questions? Contact any member of the infectious disease team at the Section of Epidemiology in Anchorage at 907-269-8000 or Bonnie Bond at the State Virology Laboratory in Fairbanks at 907-474-7017.

CDC Influenza Report



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