Survival of Salmonella enteritidis and Salmonella typhimurium in chicken manure at different levels of water activity
Sakchai Himathongkham
Department of Population Health and Reproduction, University of California, Davis, CA 95616-8743, USA
Search for more papers by this authorSuphachai Nuanualsuwan
Department of Population Health and Reproduction, University of California, Davis, CA 95616-8743, USA
Search for more papers by this authorCorresponding Author
Hans Riemann
Department of Population Health and Reproduction, University of California, Davis, CA 95616-8743, USA
*Corresponding author. Tel.: +1 (530) 752-8668; Fax: +1 (530) 752-5845; E-mail: [email protected]Search for more papers by this authorSakchai Himathongkham
Department of Population Health and Reproduction, University of California, Davis, CA 95616-8743, USA
Search for more papers by this authorSuphachai Nuanualsuwan
Department of Population Health and Reproduction, University of California, Davis, CA 95616-8743, USA
Search for more papers by this authorCorresponding Author
Hans Riemann
Department of Population Health and Reproduction, University of California, Davis, CA 95616-8743, USA
*Corresponding author. Tel.: +1 (530) 752-8668; Fax: +1 (530) 752-5845; E-mail: [email protected]Search for more papers by this authorAbstract
Survival of Salmonella enteritidis and Salmonella typhimurium in chicken manure at different levels of water activity (aw) was determined. The aw was adjusted by means of saturated salts with defined equilibrium relative humidity and the manure samples were stored aerobically at 20°C. At aw levels higher than 0.93, a moderate increase in colony-forming units over 8–9 h was found for both strains; at aw levels of 0.89–0.75, there was a thousand-fold reduction. Extended storage resulted in a million-fold reduction of Salmonella enteritidis in 8 days at an aw of 0.89. At higher and lower levels of aw, the reduction was less extensive.
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