The mortality Effect of Gamma Irradiation on Escherichia coli (in the field water)

The study was done 9 infected samples of 100 provided samples from field water of fishe-culture and bird-breeding.Sample were divided in two groups, the first group a was sent to the physics laboratory for γ irradiation (Cs 137, 20 milicurry, 6 hourse) physics and the second group was transferred by jell and ice to the bacteriologic laboratory for culturing on EMB medium directly for E. coli. After irradiation of first group, it was also trasfered in less than 2 hours to the laboratory for culture. One ml of each of the water types that has been provided will inject to the EMB And after incubation for 24 hours the colonies were studied. It was concluded that after irradiation, the number of bacteria in the culture medium decreased.