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Changing Epidemiology of Yersinia enterocolitica Infections: Markedly Decreased Rates in Young Black Children, Foodborne Diseases Active Surveillance Network (FoodNet), 1996—2009

Background. Yersinia enterocolitica causes an estimated 116 716 illnesses annually in the United States. Black children have historically had the highest rates of infection, with incidence peaking in the winter. Methods. The Foodborne Diseases Active Surveillance Network (FoodNet) conducts active su...

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Bibliographic Details
Published in:Clinical infectious diseases 2012-06, Vol.54 (suppl_5), p.S385-S390
Main Authors: Ong, Kanyin L., Gould, L. Hannah, Chen, Daniel L., Jones, Timothy F., Scheftel, Joni, Webb, Tameka Hayes, Mody, Rajal K., Mahon, Barbara E.
Format: Article
Language:English
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Summary:Background. Yersinia enterocolitica causes an estimated 116 716 illnesses annually in the United States. Black children have historically had the highest rates of infection, with incidence peaking in the winter. Methods. The Foodborne Diseases Active Surveillance Network (FoodNet) conducts active surveillance for laboratory-confirmed Y. enterocolitica infections, defined as the isolation of Y. enterocolitica or unspeciated Yersinia from a human clinical specimen. We calculated the average annual crude incidence rate per 100 000 persons from 1996 through 2009 and described rates by age, race, and geographic site. To account for changes in the FoodNet catchment area, we used a negative binomial model to estimate statistical changes in incidence using the average annual incidence in 1996—1998 as the baseline. Results. From 1996 through 2009, 2085 Y. enterocolitica infections were reported to FoodNet. The average annual crude incidence was 0.5 per 100 000 persons and was highest in blacks (0.9 per 100 000 persons). Over time, the rate in blacks declined from 3.9 to 0.4 per 100 000 persons. Declines among other racial groups were not as pronounced. The largest decline occurred in black children
ISSN:1058-4838
1537-6591
DOI:10.1093/cid/cis053