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Determination of the Incidence of Escherichia Coli O157:H7 and Salmonella Contamination on Hides and Carcasses at Cow/Bull Packing Plants

Investigators
Arthur, Terrance M; Koohmaraie, Mohammad
Institutions
USDA - Agricultural Research Service
Start date
2002
End date
2003
Objective
The stated objectives for this work were:
  1. Determine the prevalence of E. coli O157:H7 and Salmonella and the level of generic microbial contamination on the hides of slaughter cows and bulls.
  2. Determine the prevalence of E. coli O157:H7 and Salmonella and the level of generic microbial contamination on cow/bull carcasses before pre-evisceration microbial interventions.
  3. Determine the prevalence of E. coli O157:H7 and Salmonella and the level of generic microbial contamination on cow/bull carcasses after all microbial interventions.
  4. Determine the relationship between the prevalence of E. coli O157:H7 and the prevalence of Salmonella and measures of the level of generic microorganisms for cow/bull hides and carcasses.
More information

Outbreaks of foodborne illness linked to consumption of hamburger contaminated with E. coli O157:H7 have had a devastating effect on profitability of the beef industry. We have established that the prevalence of E. coli O157:H7 on the hides of fed cattle is high, that often pre-evisceration carcasses become contaminated with E. coli O157:H7, and that microbial interventions result in most (97%) fed-beef carcasses being negative for E. coli O157:H7. Yet little is known about the prevalence of E. coli O157:H7 on the hides and carcasses of cull cows and bulls. Thus, the experiments described here establish the prevalence of E. coli O157:H7 and Salmonella on the hides and carcasses of cull cows and bulls and evaluate the relationship between the prevalence of E. coli O157:H7 and other measures of microbial contamination including the prevalence of Salmonella and levels of other generic bacteria.

Funding Source
Nat'l. Cattlemen's Beef Assoc.
Project source
View this project
Categories
Salmonella
Bacterial Pathogens
Escherichia coli