Outbreak caused by cad-negative shiga toxin-producing escherichia coli O111, oklahoma

Veronica E. Calderon, Qing Chang, Mike McDermott, Michael B. Lytle, Garry McKee, Krystle Rodriguez, David A. Rasko, Vanessa Sperandio, Alfredo G. Torres

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


An outbreak of severe diarrheal illness was recently reported in northeastern Oklahoma, and Shiga toxin-producing Escherichia coli serotype O111 was identified as the etiological agent. Our results indicated that this isolate is unable to decarboxylate lysine, a characteristic that is shared with other outbreak-linked O111 isolates. Therefore, further investigation is recommended to determine whether the lysine decarboxylase test could be used to identify a subset of pathogenic E. coli, particularly Shiga toxin-producing E. coli O111 isolates, that have the potential of causing human infections and outbreaks.

Original languageEnglish (US)
Pages (from-to)107-109
Number of pages3
JournalFoodborne Pathogens and Disease
Issue number1
StatePublished - Jan 1 2010

ASJC Scopus subject areas

  • Applied Microbiology and Biotechnology
  • Food Science
  • Animal Science and Zoology
  • Microbiology


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