This study was carried out to evaluate the genotoxicity of the gamma-irradiated (0, 5 and 10 kGy) milk and ice cream. The Salmonella typhimurium reversion assay was performed using S. typhimurium TA98, TA100, TA102, TA1535 and TA1537 as tester strains. The number of revertant colonies were not increased in both milk and ice cream, compared with negative controls with or without metabolic activation. There were no significant differences among the irradiation doses. These results indicate that the gamma-irradiated milk and ice cream do not show any genotoxic effect under these experimental conditions, and that they may be safe genotoxically.

• 유지숙(충북대학교 수의과대학 및 동물의학연구소) | Ji-Sook Ryu
• 한선경(충북대학교 수의과대학 및 동물의학연구소) | Sun-Kyung Han
• 신명수(충북대학교 수의과대학 및 동물의학연구소) | Myeong-Su Shin
• 구본철(충북대학교 수의과대학 및 동물의학연구소) | Bon-Chul Koo
• 최지현(충북대학교 수의과대학 및 동물의학연구소) | Ji-Hyun Choi
• 이주운(한국원자력연구소 방사선이용연구부) | Ju-Woon Lee
• 조철훈(충남대학교 동물자원학부) | Cheorun Jo
• 함준상(농촌진흥청 축산연구소) | Jun-Sang Ham
• 이완규(충북대학교 수의과대학 및 동물의학연구소) | Wan-Kyu Lee Corresponding author