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Emerg Infect Dis. 2002 Aug;8(8):814-9.

Serologic evidence of H1 swine Influenza virus infection in swine farm residents and employees.

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1
University of Wisconsin-Madison, Madison, Wisconsin 53706, USA. olsenc@svm.vetmed.wisc.edu

Abstract

We evaluated seropositivity to swine and human H1 influenza viruses in 74 swine farm owners, employees, their family members, and veterinarians in rural south-central Wisconsin, compared with 114 urban Milwaukee, Wisconsin, residents. The number of swine farm participants with positive serum hemagglutination-inhibition (HI) antibody titers > or = 40 to swine influenza viruses (17/74) was significantly higher (p<0.001) than the number of seropositive urban control samples (1/114). The geometric mean serum HI antibody titers to swine influenza viruses were also significantly higher (p<0.001) among the farm participants. Swine virus seropositivity was significantly (p<0.05) associated with being a farm owner or a farm family member, living on a farm, or entering the swine barn > or = 4 days/week. Because pigs can play a role in generating genetically novel influenza viruses, swine farmers may represent an important sentinel population to evaluate the emergence of new pandemic influenza viruses.

PMID:
12141967
PMCID:
PMC2732505
DOI:
10.3201/eid0805.010474
[Indexed for MEDLINE]
Free PMC Article
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