Survey of retail cheeses, dairy processing environments and raw milk for Escherichia coli O157 : H7 |
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| Authors: | SE Ansay & CW Kaspar |
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| Institution: | Food Research Institute, Department of Food Microbiology and Toxicology, University of Wisconsin, Madison, WI, USA |
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| Abstract: | Escherichia coli was isolated from 58% (11/19) of retail soft and semi-soft cheeses tested, but E. coli O157 : H7 was not detected. The presence of E. coli in retail cheeses and the lack of baseline data on the prevalence of serotype O157 : H7 strains prompted us to survey ingredients and the environment in 15 cheese and dairy plants. Escherichia coli O157 : H7 was not detected in any of the 1104 samples tested, including 42 raw milk samples. These results suggest that serotype O157 : H7 is not prevalent within dairy product ingredients and processing environments. |
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