Multistate Outbreak of Listeriosis Associated with Packaged Leafy Green Salads, United States and Canada, 2015–2016

Details

• Alternative Title:
  Emerg Infect Dis
• Personal Author:
  Self, Julie L. ; Conrad, Amanda ; Stroika, Steven ; Jackson, Alikeh ; Whitlock, Laura ; Jackson, Kelly A. ; Beal, Jennifer ; Wellman, Allison ; Fatica, Marianne K. ; Bidol, Sally ; Huth, Paula Pennell ; Hamel, Meghan ; Franklin, Kristyn ; Tschetter, Lorelee ; Kopko, Christine ; Kirsch, Penelope ; Wise, Matthew E. ; Basler, Colin
• Description:
  We investigated an outbreak of listeriosis detected by whole-genome multilocus sequence typing and associated with packaged leafy green salads. Nineteen cases were identified in the United States during July 5, 2015-January 31, 2016; isolates from case-patients were closely related (median difference 3 alleles, range 0-16 alleles). Of 16 case-patients interviewed, all reported salad consumption. Of 9 case-patients who recalled brand information, all reported brands processed at a common US facility. The Public Health Agency of Canada simultaneously investigated 14 cases of listeriosis associated with this outbreak. Isolates from the processing facility, packaged leafy green salads, and 9 case-patients from Canada were closely related to US clinical isolates (median difference 3 alleles, range 0-16 alleles). This investigation led to a recall of packaged leafy green salads made at the processing facility. Additional research is needed to identify best practices and effective policies to reduce the likelihood of Listeria monocytogenes contamination of fresh produce.
• Subjects:
  Adolescent Adult Aged Aged, 80 And Over Child Child, Preschool Disease Notification Disease Outbreaks Female Foodborne Diseases Food Microbiology Genome, Bacterial Geography, Medical Humans Listeria Listeriosis Male Middle Aged Multilocus Sequence Typing Pregnancy Public Health Surveillance Salads Seasons Synopsis Young Adult

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• Source:
  Emerg Infect Dis. 25(8):1461-1468
• Pubmed ID:
  31310227
• Pubmed Central ID:
  PMC6649349
• Document Type:
  Journal Article
• Place as Subject:
  Canada ; United States
• Location:
  North America
• Volume:
  25
• Issue:
  8
• Collection(s):
  Emerging Infectious Diseases
• Main Document Checksum:
  urn:sha256:f2f1e9732ea53669b8b009aa9c832f3b6c62cbe06d8d7105985b1eb02f523ec6
• Download URL:
  https://stacks.cdc.gov/view/cdc/80309/cdc_80309_DS1.pdf
• File Type:
  [PDF - 583.30 KB ]