Inactivation of Strains of Salmonella senftenberg by Gamma Irradiation

S ummary : Strains of Salmonella senftenberg isolated from Norwegian herring meal and strain 775W were exposed to gamma radiation from a ⁶⁰Co source. When they were irradiated in phosphate buffered saline solution, the average D₁₀ values for all the strains was 19·3 krad. On irradiating strains 56 and 775W in herring meal the D₁₀ values were 192·1 and 188·5 krad, respectively, thus indicating that the suspending medium had a great effect on the radiation resistance of the organisms. Radiation doses of the order of 0·8–1·3 Mrad are recommended for the decontamination of herring meal.