Investigation of an Outbreak of Variant Influenza A(H3N2) Virus Infection Associated With an Agricultural FairemdashOhio, August 2012

Background. In 2012, one third of cases in a multistate outbreak of variant influenza A(H3N2) virus ([H3N2]v) infection occurred in Ohio. We conducted an investigation of (H3N2)v cases associated with agricultural Fair A in Ohio. Methods. We surveyed Fair A swine exhibitors and their household membe...

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Bibliographic Details
Published in:The Journal of infectious diseases 2015-11, Vol.212 (10), p.1592-1599
Main Authors: Greenbaum, Adena, Quinn, Celia, Bailer, Jennifer, Su, Su, Havers, Fiona, Durand, Lizette O, Jiang, Victoria, Page, Shannon, Budd, Jeremy, Shaw, Michael
Format: Article
Language:English
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Summary:Background. In 2012, one third of cases in a multistate outbreak of variant influenza A(H3N2) virus ([H3N2]v) infection occurred in Ohio. We conducted an investigation of (H3N2)v cases associated with agricultural Fair A in Ohio. Methods. We surveyed Fair A swine exhibitors and their household members. Confirmed cases had influenza-like illness (ILI) and a positive laboratory test for (H3N2)v, and probable cases had ILI. We calculated attack rates. We determined risk factors for infection, using multivariable log-binomial regression. Results. We identified 20 confirmed and 94 probable cases associated with Fair A. Among 114 cases, the median age was 10 years, there were no hospitalizations or deaths, and 82% had swine exposure. In the exhibitor household cohort of 359 persons (83 households), we identified 6 confirmed cases (2%) and 40 probable cases (11%). An age of
ISSN:0022-1899
1537-6613
DOI:10.1093/infdis/jiv269