Coli o157h7 flash pasteurization 72c for 15s bulk

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Unformatted text preview: reduce the microbial load in heat-sensitive liquids –  Does not kill all organisms, it is not a method of sterilization. •  Reduces the microbial load, increases the shelf life of the product. •  Pasteurization reduces significantly the population of many pathogens: •  •  •  •  •  •  Listeria monocytogenes Salmonella enterica Campylobacter E. coli O157:H7 Flash pasteurization: 72°C for 15s. Bulk pasteurization: 65°C, 30min. 1. Physical methods: radia4on •  Microwaves, UV, X-rays, gamma rays, and electrons can reduce microbial growth •  UV has sufficient energy to cause modifications and breaks in DNA, which inhibit replication, transcription and cause death. –  UV is useful for decontamination of surfaces –  Cannot penetrate solid, opaque, or light-absorbing surfaces Brock Biology of Microorganisms, 13th Edition. Radia4on Ionizing radiation –  Electromagnetic radiation that produces ions and other reactive molecules –  Generates electrons,...
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This note was uploaded on 03/20/2014 for the course PSYC 101 taught by Professor Catone during the Spring '07 term at CSU Fullerton.

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