Skip directly to search Skip directly to A to Z list Skip directly to site content
CDC Home

Volume 19, Number 6—June 2013

Research

Active Surveillance for Influenza A Virus among Swine, Midwestern United States, 2009–2011

Cesar A. Corzo, Marie CulhaneComments to Author , Kevin Juleen, Evelyn Stigger-Rosser, Mariette F. Ducatez, Richard J. Webby, and James F. Lowe
Author affiliations: University of Minnesota, Saint Paul, Minnesota, USA (C.A. Corzo, M. Culhane, K. Juleen); St. Jude Children’s Research Hospital, Memphis, Tennessee, USA (E. Stigger-Rosser, M.F. Ducatez, R.J. Webby); Carthage Veterinary Services, Carthage, Illinois, USA (J.F. Lowe)

Main Article

Table 3

Relationship between group influenza status with age and season in growing pigs tested for influenza virus, midwestern United States, June 2009–December 2011*

Variable
Estimate
Odds ratio (95% CI)
p value
Intercept
–1.330
NA
<0.01
Season
Fall (referent) NA NA NA
Spring 0.741 2.0 (1.1– 3.8) 0.01
Summer 0.657 1.9 (1.0–3.5) 0.03
Winter –0.072 0.9 (0.4–1.8) 0.83
Age –0.041 0.9 (0.9–1.0) 0.09

*Repeated measures logistic regression multivariable analysis. Generalized χ2 divided by degrees of freedom = 0.92. NA, not applicable.

Main Article

Top of Page

USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO