Sterilization effect of Co60 γ rays
Diets/Radiation-sterilized Diets/
Sterilization effect of Co60 γ rays
1.Radioresistance of microorganisms
2.Dose required for the sterilization of radioresistant microbes
M = Micrococcus radiodurans (radioresistant bacterium)
B=Bacillus cereus (radioresistant bacterium)
The figures in the table denote the number of samples with surviving bacterial cells/the number of tested samples.
*In the resistant microbe groups, the respective bacterial cells were infused into a hole 2 mm in diameter made in the central part of each CL-2 pellet.
3.Results of sterilization tests of products
Samples of diets for germ-free animals and SPF animals were extracted randomly for each irradiation dose and tested for sterility by culture examination for aerobes, anaerobes, and fungi. The results were all negative.
