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classification of organisms according to oxygen requirement
100
can only grow in low concentrations of oxygen (lower than air)
What is microaerohpiles
200
aerobic organisms can maintain life via. fermentaiton or anerobic resp. with reduced metabolic efficiency in the absence of oxygen And example
What is facultative anaerobe ex. e. coli
300
need oxygen ex.
What is obligate aerobe ex. mycobacterium tuburculosis
400
what is an obligate anaerobe
oxygen is a deadly poison ( dont have enzymes to get rid of toxic and highly reactive forms of oxygen) ex. clostridium sp.
500
what is aerotolerant anaerobe
can't use oxygen in metabolic pathways but can tolerate it by having enzymes to detoxify poisonous forms ex. lactobacilli