Australian Influenza Surveillance Report no.40 2010 [SEC=UNCLASSIFIED]

[Wishart, Michael]

Dear All

The Australian Influenza Surveillance Report no.40 2010 which reports on influenza activity up until 8 October 2010 has been produced.

Of note
* Levels of influenza-like illness (ILI) in the community increased through some surveillance systems this reporting period (ASPREN and WA EDs), while others (Flutracking and the National Health Call Centre Network) showed a decrease in ILI. Local, regional and widespread activity was reported within jurisdictions. The number of laboratory confirmed notifications continued to decrease nationally and in all states and territories.
* There were 339 laboratory confirmed notifications of influenza during this reporting period, including 222 pandemic (H1N1) 2009 cases. Notifications of laboratory confirmed influenza were highest in South Australia.
* Results from sentinel laboratory surveillance systems for this reporting period show that 17% of the respiratory tests conducted over this period were positive for influenza, which is the same as the last two reporting periods. In 2010, a total of 1,184 specimens have been positive for influenza (of 13,457 specimens tested), of which 67% were pandemic (H1N1) 2009, 9% were A/H3N2, 21% were influenza B and 3% were influenza A untyped.
* In recent weeks there has been an increase in the proportion of influenza type B in Western Australia.
* As at 8 October 2010, there have been 9,084 confirmed cases of influenza entered into the National Notifiable Diseases Surveillance System (NNDSS) in 2010. A total of 43,022 confirmed cases of pandemic (H1N1) 2009 have occurred in Australia since May 2009.
* Sentinel hospitals reported a slight increase in the number of influenza associated hospitalisations compared to the previous reporting period, with 15 admissions, including 11 for pandemic (H1N1) 2009. ANZICS reported an decrease in ICU admissions for influenza this reporting period, with six admissions.
* The WHO has advised that the world is no longer in phase 6 of influenza pandemic alert, and has moved into the post pandemic period.

A summary version of this report will shortly be available on the web at the following address:
http://www.healthemergency.gov.au/internet/healthemergency/publishing.nsf/Content/resources

If you have any questions, comments or feedback please reply to flu@health.gov.au

Kind regards,

Influenza Surveillance Team
Vaccine Preventable Disease Surveillance Section
Surveillance Branch
Office of Health Protection

Please note that the Influenza Surveillance Team, of the Vaccine Preventable Disease Surveillance Section has a group e-mail address which is flu@health.gov.au. While you can still email individual members of the team, this email address will ensure prompt responses and will avoid delays when individual staff members are absent.

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