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Name: Lianne
Status: other
Grade: other
Location: Outside U.S.
Country: USA
Date: Summer 2013

Is H. Pylorii the only bacteria able to survive the acidic condition of the stomach, or are there others?

Hi Lianne,

Thanks for the question. Yes, other bacteria are able to survive the acidic conditions in the stomach. For instance, the bacteria that are present in acidopholus yougurt (and milk) are able to survive the stomach's acid and to repopulate the large intestine. These acidopholus bacteria are "good" bacteria and are useful in restoring bacterial colonies in the large intestine after a treatment of antibiotics.

I hope this helps. Please let me know if you have more questions. Thanks Jeff

I don’t know, but I would be very surprised given the number of bacterial species, that H. Pylori is uniquely adapted to low pH environments.

Vince Calder

Very good question. Many bacteria have specialized cell membranes that can withstand low pH, and some eve form a protective cyst-like covering to protect them against the distructive pHs. Keep in mind that low pH in the digestive system is primarily for protein digestion and the bactereia cell membrane is not protein based. That said, there are many bacteria that are destroyed in the stomach.

Steve Sample

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