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Published on: December 8, 2017
Survival and Growth Potential of Aeromonas hydrophila in Reconditioned Pork-Processing-Plant Water †
Samuel A Palumbo1, Jeffrey Call1, Binh Huynh1
1Microbial Food Safety Research Unit, U.S. Department of Agriculture, Eastern Regional Research Center, Agricultural Research Service, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA.
Abstract:
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 2.91 ± 0.61, 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.
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