the destruction of bacteria in and the shelf life of irradiated chicken and ground beef were not improved by low concentrations of infused or added acetic acid. In another study, the differences in pH of five commercial orange juice formulations (from pH 3.87 to 4.13) had no influence on the radiation dose required for 90% inactivation of a Salmonella Enteritidis strain isolated from a citrus juice associated with an outbreak of salmonellosis.