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Survival and Growth Potential of Aeromonas hydrophila in Reconditioned Pork-Processing-Plant Water

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The growth and survival of Aeromonas hydrophila K144 was studied in reconditioned pork-processing-plant water, Neutralization of residual chlorine by thiosulfate permitted growth and long-term survival of the bacterium at temperatures ranging from 5 to 28°C; growth was also observed at 37 and 42°C but survival times were shorter. The coliform growth response, a bioassay system to measure the amount of nutrients available for microbial growth, for the reconditioned water was 2.9l ± 0.6l, which agreed with our observation that this water contained sufficient nutrients to support about 3 log units of growth of A. hydrophila. Our results indicate that residual chlorine levels are necessary to prevent the growth of any A. hydrophila which might contaminate reconditioned water.


Document Type: Research Article

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

Publication date: August 1, 1996

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