How would you define bacteria showing optimum growth at pH 6?

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Phil Geis

Don't think it's an acidophile(pH

Surajit Chakraborty

Hi Himanshu,

While observing growth in a bit acidic pH we can never conclude an organism to be acidophilic. Even almost all neutrophilic bacteria can survive up to an extent in acidic or alkaline pH, although their optimum growth is obtained only in optimum bacteriological pH (around pH 7.4). Think about our intestine, even in places in the intestine where pH is not neutral , but many neutrophiles are surviving. Strictly acidophiles grow in pH as low as ~3.