Gamma irradiation patterns of Salmonella typhosa, Salmonella paratyphi B, and Salmonella wichita in crabmeat Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/1544br513

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  • Studies were conducted under controlled conditions in order to observe the resulting survival patterns in solid crabmeat of Salmonella typhosa, Salmonella paratyphi B, and SaImonella wichita following individual exposure to various doses of gamma radiation. As shown in their survival curves, these species of Salmonella exhibited in varying degrees a rapid non-linear decline in viability with respect to the radiation doses. This decline tended to become very gradual as the radiation dose increased, showing a distinct tailing of small numbers of survivors over a number of increasing doses at. the end of the dose-survival curve. This phenomenon was referred to as the "tailing effect". The above species of Salmonella were further subjected individually to gamma radiation in various dilutions of crabmeat. The results revealed that the "tailing effect" gradually disappeared as the concentration of the crabmeat decreased with the dose-survival curve tending to become linear.
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