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粪便大肠菌系指一群需氧及兼性厌氧在44℃生长时能使乳糖发酵并在24小时内产酸产气的革兰氏阴性无芽孢杆菌。粪便大肠菌是评价土壤卫生状况时必检的土壤卫生细菌学指标,实验结果用菌值表示。 1.根据粪便大肠菌应具有的生物特性,如革兰氏阴性无芽孢杆菌,在44℃24小时内能发酵乳糖并产酸产气,能在选择性培养基上产生典型菌落。
Stool Coliform refers to a group of Gram-negative bacillus that produce both aerobic and facultative anaerobic growth at 44 ° C, which ferment lactose and produce acid gas within 24 hours. Stool coliform bacteria soil hygienic bacteriological indicators will be seized when soil health assessment, the experimental results expressed as bacteria. 1. According to the biological characteristics fecal coliform should have, such as Gram-negative bacillus, within 24 hours at 44 ℃ can ferment lactose and acid gas production, can produce typical colonies on selective medium.