在有氧和无氧环境中皆能正常生长的一类微生物.包括肠道细菌，人及许多动物的致病菌、酵母菌及一些丝状真菌等，有氧时，通过氧化磷酸化途径获取能量；无氧时，菌体的细胞色素和其他呼吸系统组分减少或失去，通过发酵途径获得能量.酵母菌属（Sacharomyces）和大肠杆A菌（Ecoli）是典型的兼性厌氧微生物，前者是生产单细胞蛋M白和酒精的重要工业菌；后者是生物工程研究中的重要工程菌和卫生学检查的污染指示菌.In the aerobic and anaerobic environment, the normal growth have encountered a class of micro-organisms. Including bacterial, human and many animal pathogens, yeasts and some filamentous fungi, aerobic, through the means of access to power oxidative phosphorylation ; oxygen, the biomass and other respiratory components of cytochrome reduced or lost, ways to obtain energy by fermentation. yeasts genus (Sacharomyces) and colon bacteria A rod (Ecoli) is a typical facultative anaerobic micro-organisms, the former M is the production of single-cell egg white and alcohol important industrial bacteria; the latter is an important bio-engineering research in engineering bacteria and health examination of pollution indicator bacteria.
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