Ecological Studies on Causative Agents of Food Poisoning isolates from Food Animals #2. Time Variation of Bovine Mastitis outbreak in a Municipal Area and Antibiotic Susceptibility of Pathogens

축산 유래 식중독 세균에 관한 생태학적 연구 제2보 일부 도시 근교지역 젖소 유방염의 발생양상과 항생제 감수성의 경시 변화

Bovine mastitis was examined by use of the rolling ball viscosity test in Kwang-ju area. Antibiotic sus-ceptibility of isolated pathogens from raw milk was investigated by the disc method. Positive rate of so-matic cell counts (over 500,000 cells/ml) was decreased from 11.1% in 1991∼1993 to 8.0-% in 1995∼1997. Isolated mastitis-causing-pathogens were identified as Staphylococcus sp. (49.7%) Escherichia coki(23.2%) Streptococcus sp. (10.4%) and Bacillus sp(7.2%) Antibiotic susceptibility of isolated pathogens to almost antibiotics was decreased.