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Antimicrobial Properties of the Chelating Agent EDTA on Streptococcal Bovine Mastitis Isolates

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Abstract:

To determine the efficacy of the chelating agent EDTA on microbial growth, separate cultures of two streptococcal bovine mastitis isolates, Streptococcus agalactiae and Streptococcus uberis, were exposed to known concentrations of EDTA. Bacterial cultures of 108 CFU/ml were exposed to concentrations of EDTA ranging from 30 to 100 mM in an in-vitro-milk environment. Multiple replications of cultures exposed to EDTA were plated during a two-hour time course. A concentration of 100 mM EDTA resulted in a 90% reduction of S. agalactiae and a 99% reduction of S. uberis. Under these experimental conditions, EDTA treatments in cultures of both isolates exhibited from 1 to 2 log reductions suggesting that EDTA is a potentially effective antimicrobial against streptococcal isolates implicated in causing bovine mastitis.

Document Type: Research Article

Affiliations: 1: Dairy Food Safety Laboratory, Veterinary Medicine and Teaching Research Center, University of California, Davis, California 95616, USA 2: Dairy Food Safety Laboratory, Veterinary Medicine and Teaching Research Center, University of California, Davis, California 95616, USA; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, USA 3: Department of Pathology and Immunology, School of Veterinary Medicine, University of California, Davis, California 95616, USA

Publication date: June 1, 2006

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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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