Tittiger F
Can J Comp Med. 1971 Apr;35(2):167-73.
Studies on the bacterial contamination in rendered product and the environment of five rendering plants were carried out. From a total of 180 samples examined, total bacterial and anaerobic spore counts were conducted on 135. Plants with melter systems produced a sterile product which was recontaminated before reaching the finished stage. Two plants with continuous rendering systems did not achieve sterilization of the product during the heating process. Spore forming organisms regularly survived heating in the continuous rendering system. Salmonellae were isolated from samples collected in four of the five plants under study. Pathogenic Clostridia, especially Cl. novyi, Cl. septicum and Cl. perfringens were present in samples from all plants. Other pathogens found were Staphylococci, Streptococci, Corynebacteria and Pasteurella.
对五家炼油厂的炼油产品及环境中的细菌污染情况进行了研究。在总共检测的180个样本中，对135个样本进行了总细菌数和厌氧芽孢数检测。配备熔化系统的工厂生产出无菌产品，但在成品阶段之前又被重新污染。两家采用连续炼油系统的工厂在加热过程中未能实现产品灭菌。在连续炼油系统中，形成芽孢的微生物在加热后仍能存活。在所研究的五家工厂中，有四家工厂采集的样本中分离出了沙门氏菌。所有工厂的样本中均存在致病性梭菌，尤其是诺维氏梭菌、败血梭菌和产气荚膜梭菌。发现的其他病原体有葡萄球菌、链球菌、棒状杆菌和巴斯德氏菌。
