Multistate outbreak of Listeria monocytogenes infection linked to delicatessen turkey meat

Sonja J. Olsen, Mary Patrick, Susan B. Hunter, Vasudha Reddy, Laura Kornstein, William R. MacKenzie, Kimberly Lane, Sally Bidol, Gillian A. Stoltman, Douglas M. Frye, Irene Lee, Sharon Hurd, Timothy F. Jones, Tracy N. LaPorte, Wallis Dewitt, Lewis Graves, Martin Wiedmann, Dianna J. Schoonmaker-Bopp, Ada J. Huang, Curt VincentAl Bugenhagen, Joe Corby, Edmund R. Carloni, Mara E. Holcomb, Raymond F. Woron, Shelley M. Zansky, Gerrie Dowdle, Forrest Smith, Susann Ahrabi-Fard, Anna Rae Ong, Nicole Tucker, Noreen A. Hynes, Paul Mead

Research output: Contribution to journalArticlepeer-review

Abstract

Background. Despite a decreasing incidence of listeriosis in the United States, molecular subtyping has increased the number of recognized outbreaks. In September 2000, the New York City Department of Health identified a cluster of infections caused by Listeria monocytogenes isolates with identical molecular subtypes by pulsed-field gel electrophoresis (PFGE) and ribotyping. Methods. To determine the magnitude of the outbreak and identify risk factors for infection, we notified state health departments and conducted a case-control study. A case was defined as a patient or mother-infant pair infected with Listeria monocytogenes whose isolate yielded the outbreak PFGE pattern. Controls were patients infected with Listeria monocytogenes whose isolate yielded a different PFGE pattern. Patients were asked about food and drink consumed during the 30 days before the onset of illness. Results. Between May and December 2000, there were 30 clinical isolates of Listeria monocytogenes with identical PFGE patterns identified in 11 US states. Cases of infection caused by these isolates were associated with 4 deaths and 3 miscarriages. A case-control study implicated sliced processed turkey from a delicatessen (Mantel-Haenszel odds ratio, 8.0; 95% confidence interval, 1.2-43.3). A traceback investigation identified a single processing plant as the likely source of the outbreak, and the company voluntarily recalled 16 million pounds of processed meat. The same plant had been identified in a Listeria contamination event that had occurred more than a decade previously. Conclusions. Prevention of persistent L. monocytogenes contamination in food processing plants presents a critical challenge to food safety professionals.

Original languageEnglish (US)
Pages (from-to)962-967
Number of pages6
JournalClinical Infectious Diseases
Volume40
Issue number7
DOIs
StatePublished - Apr 1 2005
Externally publishedYes

ASJC Scopus subject areas

  • Microbiology (medical)
  • Infectious Diseases

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