Factors associated with fecal shedding of verotoxin-producing Escherichia coli O157 on dairy farms

L. Garber, S. Wells, L. Schroeder-Tucker, K. Ferris

Research output: Contribution to journalArticlepeer-review

74 Scopus citations

Abstract

Fecal samples were collected from 4,361 dairy cows on 91 dairy operations between 26 February and 8 July 1996. Fecal samples were cultured for Escherichia coli O157, and positive isolates were probed for verotoxin-producing genes. A total of 52 (1.2%) fecal samples on 22 (24.2%) operations were positive for verotoxin-producing E. coli O157. Herds in which samples were collected on or after 1 May 1996 were significantly more likely to test positive than herds sampled before that date (odds ratio = 7.7). Herds maintained on farms on which alleyways were flushed with water to remove manure were 8.0 times more likely to have samples test positive for verotoxin-producing E. coli O157 than were herds maintained on farms cleaned by use of other methods of manure removal.

Original languageEnglish (US)
Pages (from-to)307-312
Number of pages6
JournalJournal of food protection
Volume62
Issue number4
DOIs
StatePublished - Apr 1999

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