Prevalence and Enumeration of Escherichia coli O157:H7 and Salmonella in U.S. Abattoirs that Process Fewer than 1,000 Head of Cattle per Day

Authors: Bosilevac, Joseph M.¹; Arthur, Terrance M.¹; Bono, James L.¹; Brichta-Harhay, Dayna M.¹; Kalchayanand, Norasak¹; King, David A.¹; Shackelford, Steve D.¹; Wheeler, Tommy L.¹; Koohmaraie, Mohammad²

Source: Journal of Food Protection®, Volume 72, Number 6, June 2009 , pp. 1272-1278(7)

Publisher: International Association for Food Protection

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Abstract:

A significant portion (15 to 20%) of beef in the United States is produced in small beef processing plants that harvest fewer than 1,000 cattle per day. However, there are little data on the prevalence and levels of Escherichia coli O157:H7 and Salmonella in these processing plants. To address this lack of data, hides (n = 1,995) and carcasses (n = 1,995) of cattle at seven small processing plants located across the United States were analyzed for E. coli O157:H7 and Salmonella. Across all plants, hide prevalence of E. coli O157:H7 and Salmonella was 71 and 91%, respectively. Twelve percent of hides had E. coli O157:H7 at enumerable levels (≥40 CFU/100 cm²), while 36% of hides had Salmonella at enumerable levels. Across all plants, the prevalence of E. coli O157:H7 on preevisceration carcasses was 33%, with 2% at an enumerable level (≥0.8 CFU/100 cm²). Across all plants, Salmonella prevalence on preevisceration carcasses was 58%, with 8% at an enumerable level. Significant plant-to-plant variations in levels and prevalence of pathogens on carcasses were detected. Reduced levels of pathogens on carcasses were noted among small processors that had incorporated a hide-directed intervention. The results obtained are comparable to those observed previously for larger processors, showing that smaller beef processors face and address the same challenges as do larger beef processors.

Document Type: Research article

Affiliations: 1: U.S. Department of Agriculture, Agricultural Research Service, Roman L. Hruska U.S. Meat Animal Research Center, Clay Center, Nebraska 68933-0166, USA 2: U.S. Department of Agriculture, Agricultural Research Service, Roman L. Hruska U.S. Meat Animal Research Center, Clay Center, Nebraska 68933-0166, USA; IEH Laboratories and Consulting Group, 15300 Bothell Way N.E., Lake Forest Park, WA 98155, USA

Publication date: 2009-06-01

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First published in 1937, the Journal of Food Protection^®, is a refereed monthly publication. Each issue contains scientific research and authoritative review articles reporting on a variety of topics in food science pertaining to food safety and quality. The Journal is internationally recognized as the leading publication in the field of food microbiology with a readership exceeding 11,000 scientists from 70 countries. The Journal of Food Protection^® is indexed in Index Medicus, Current Contents, BIOSIS, PubMed, Medline, and many others.

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Prevalence and Enumeration of Escherichia coli O157:H7 and Salmonella in U.S. Abattoirs that Process Fewer than 1,000 Head of Cattle per Day

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