Cook-in-bag B Beef roasts cooked was eliminated and Smith, A.M., D.A. Evans, Clostridium Salmonella C. – packaging and in plastic bags, in was reduced 3 log units. and B.M. Buck. 1981. perfringens perfringens a water bath to Growth and survival of Salmonella survival in roast 140°F (60°C) in Clostridium perfringens beef internal rare roast beef prepared in a temperature for 12 water bath. Journal of Food minutes Protection. 44: 9-14. B After cooking No hazard is likely to occur from Clostridium – growth ground beef within 24 perfringens Clostridium perfringens during storage of product (3% salt, hours at 82˚F (28˚C), as no growth cooked ground and pH 5.5) to occurred. 36 hours were required for 1 beef 160˚F (71.1˚C), log growth. cooled to 32˚F (0˚C) then stored at 82˚F (28˚C), in vacuumized, After cooking Growth of Clostridium perfringens ground beef was delayed (less than 1 log increase) product (0% salt, 5 days, and posed no hazard in that pH 7.0) to 160˚F time. (71.1˚C), cooled to 32˚F (0˚C) then stored at 59˚F (15˚C), in vacuumized,
Cook-in-bag packaging B – Clostridium perfringens and Salmonella survival in roast beef Beef roasts cooked in plastic bags, in a water bath to 140°F (60°C) internal temperature for 12 minutes Salmonella was eliminated and C. perfringens was reduced 3 log units. Smith, A.M., D.A. Evans, and B.M. Buck. 1981. Growth and survival of Clostridium perfringens in rare roast beef prepared in a water bath. Journal of Food Protection. 44: 9-14. B – Clostridium perfringens growth during storage of cooked ground beef After cooking ground beef product (3% salt, and pH 5.5) to 160˚F (71.1˚C), cooled to 32˚F (0˚C) then stored at 82˚F (28˚C), in vacuumized, No hazard is likely to occur from Clostridium perfringens within 24 hours at 82˚F (28˚C), as no growth occurred. 36 hours were required for 1 log growth. After cooking ground beef product (0% salt, pH 7.0) to 160˚F (71.1˚C), cooled to 32˚F (0˚C) then stored at 59˚F (15˚C), in vacuumized, Growth of Clostridium perfringens was delayed (less than 1 log increase) 5 days, and posed no hazard in that time.