Population Changes and Verotoxin Production of Enterohemorrhagic Escherichia coli Strains Inoculated in Milk and Ground Beef Held at Low Temperatures

$37.00 plus tax (Refund Policy)

Buy Article:

Abstract:

This study investigated the influence of low temperature and background flora on growth and verotoxin production by strains of enterohemorrhagic Escherichia coli in milk and ground beef. In the presence of no or low background flora, there was growth of the strains at 8°C. High background flora in ground beef inhibited growth at this temperature. In the foods held at low temperatures, only small amounts of verotoxin were detected; however, even at the optimum 37°C, there was still relatively little verotoxin formed compared to that in broth cultures. Even under nongrowth conditions (high background flora or 5°C holding temperature), the strains remained viable. These data suggest any food contaminated by these bacteria and held at the recommended temperature of 5°C will remain hazardous, and under certain conditions, holding at temperatures ≥8°C would increase the hazard.

Keywords: BACKGROUND FLORA; E. COLI O157:H7; EHEC; GROUND BEEF; LOW TEMPERATURE; MILK; VEROTOXIN

Document Type: Research Article

Affiliations: Microbial Food Safety Research Unit, U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 E. Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA

Publication date: July 1, 1997

More about this publication?
  • IAFP members must first sign in on the right to access full text articles of JFP

    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.

    Print and online subscriptions are available to Members and Institutional subscribers. Online visitors who are not IAFP Members or journal subscribers will be charged on a pay-per-view basis. Information can be obtained by calling +1 800.369.6337; +1 515.276.3344; fax: +1 515.276.8655, E-mail: info@foodprotection.org or Web site: www.foodprotection.org
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Membership Information
  • Information for Advertisers
  • ingentaconnect is not responsible for the content or availability of external websites
Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more