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In 1882, german bacteriologist paul erhlich described a method for staining mycobacterium and noted, "it may be that all disinfecting agents which are acidic will be without effect on this [tubercle] bacillus, and one will have to be limited to alkaline agents." how did he reach this conclusion without testing disinfectants?

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n 1882, german bacteriologist paul erhlich described a method for staining mycobacterium and noted, "it may be that all disinfecting agents which are acidic will be without effect on this [tubercle] bacillus, and one will have to be limited to alkaline agents." He reach this conclusion without testing disinfectants by his knowledge that: Mycobacterium is resistant to acid because it does not destroy the membrane even when it is exposed to acid alcohol. So an alkaline product would destroy it.