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A Study of Coagulase-Positive Staphylococci in Salami Before Fermentation
1Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Minnesota, St. Paul, 55108 and Department of Epidemiology and Preventive Medicine, School of Veternairy Medicine, University of California, Davis, California 95616.
Abstract:
Thirty-six samples of salami formulation were examined for coagulase-positive (CP) staphylococci. A statistical analysis (Analysis of Covariance) was also performed to evaluate six variables and their effects on the dependent variable Y (number of CP staphylococci/g). The six variables evaluated were: (a) certification-non-certification, (b) daily sample order, (c) proportion of meat (pork shoulders, pork jowls, and beef), and (d) total plate count. The average coagulase-positive staphylococcal count was determined to be 3400/g (range 225 to 17000). Of the determinable variables, only certification (avg. 500 CP staphylococci/g) versus non-certification (avg. 2100 CP staphylococci/g) was statistically significant. The additional freezing at -10 F (-24 C) for 10 days for trichina certification appeared to reduce the number of viable staphylococci.
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