Yersinia enterocolitica infections associated with improperly pasteurized milk products: southwest Pennsylvania, March–August, 2011

In July 2011, a cluster of Yersinia enterocolitica infections was detected in southwestern Pennsylvania, USA. We investigated the outbreak's source and scope in order to prevent further transmission. Twenty-two persons were diagnosed with yersiniosis; 16 of whom reported consuming pasteurized d...

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Bibliographic Details
Published in:Epidemiology and infection 2014-08, Vol.142 (8), p.1640-1650
Main Authors: LONGENBERGER, A. H., GRONOSTAJ, M. P., YEE, G. Y., JOHNSON, L. M., LANDO, J. F., VOORHEES, R. E., WALLER, K., WELTMAN, A. C., MOLL, M., LYSS, S. B., CADWELL, B. L., GLADNEY, L. M., OSTROFF, S. M.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Animals
Bacteriology
Biological and medical sciences
Case reports
Child
Child, Preschool
Cohort Studies
Electrophoresis, Gel, Pulsed-Field
Epidemiology
Female
Food
Foodborne Diseases - epidemiology
Foodborne Diseases - microbiology
Fundamental and applied biological sciences. Psychology
Gastrointestinal Infection
Genotype
Humans
Ice cream
Illnesses
Infant
Infections
Male
Medical laboratories
Microbiology
Middle Aged
Milk
Milk - microbiology
Miscellaneous
Molecular Typing
Original Papers
Pasteurization
Pasteurized milk
Pennsylvania - epidemiology
Preventive medicine
Public health
Yersinia
Yersinia enterocolitica
Yersinia enterocolitica - classification
Yersinia enterocolitica - genetics
Yersinia enterocolitica - isolation & purification
Yersinia Infections - epidemiology
Yersinia Infections - microbiology
Young Adult
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Summary:In July 2011, a cluster of Yersinia enterocolitica infections was detected in southwestern Pennsylvania, USA. We investigated the outbreak's source and scope in order to prevent further transmission. Twenty-two persons were diagnosed with yersiniosis; 16 of whom reported consuming pasteurized dairy products from dairy A. Pasteurized milk and food samples were collected from this dairy. Y. enterocolitica was isolated from two products. Isolates from both food samples and available clinical isolates from nine dairy A consumers were indistinguishable by pulsed-field gel electrophoresis. Environmental and microbiological investigations were performed at dairy A and pasteurization deficiencies were noted. Because consumption of pasteurized milk is common and outbreaks have the potential to become large, public health interventions such as consumer advisories or closure of the dairy must be implemented quickly to prevent additional cases if epidemiological or laboratory evidence implicates pasteurized milk as the outbreak source.
ISSN:0950-2688
1469-4409
DOI:10.1017/S0950268813002616