Re: Indiana 2011-2012 Flu Season: Weeks 40-43 (Triple Reassortment Detected)
Re: Indiana 2011-2012 Flu Season: Weeks 40-43 (Triple Reassortment Detected)
Week 43:
• ED LIL: 1.24%; Sentinel ILI:.98% is at baseline.
• During week 43, 0% (0/10) of specimens that were positive for seasonal influenza. One was positive Adenovirus.
• During week 43, 0 Indiana schools (K-12) reported that their absenteeism rate was 20% or higher.
• Universities and non-university facilities are experiencing similar levels of ILI in their communities.
• The Indiana State Department of Health Laboratory identified a suspect swine-origin influenza A virus on October 28, 2011. The specimen was forwarded to the CDC where genome sequencing confirmed the specimen to be
positive for the presence of a triple reassortant H3N2 (SOtrH3N2) influenza virus. The case has been investigated by ISDH Surveillance and Investigations Division, the Indiana State Department of Health Laboratory, and the CDC. The affected Local Health Department and BOAH have been notified and have been cooperative in the investigation. The case patient had
very close contact with pigs in the week prior to illness onset. No illness has been reported in the case’s household or close contacts.
This case is the 7th recognized case of human infection with S-OtrH3N2 with the M segment gene from the pH1N1virus (previously identified in Maine [2], Indiana [1], and Pennsylvania [3]) in 2011. This case from Indiana marks the second case in the past 3 months and the 15th human case of S-OtrH3N2 reported to CDC since 2005. No community transmission has been documented in this case. General information about swine influenza is available at
http://www.cdc.gov/flu/swineflu/.
http://www.in.gov/isdh/22104.htm