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[Microbiology] Re: Helicobacter pylorii

Bob bbx107 at excite.XXXX.com
Sat Mar 18 12:41:12 EST 2006


On Fri, 17 Mar 2006 22:54:03 +0100, "Fabrizio" <nospam at nospam.it>
wrote:

>Hi,
>        the Helicobacter pylorii changes its form between spiral and coccoid 
>one depending on enviromental condition 
>http://www.sodbrennen-welt.de/science/1994/1994_7524304.htm.
>
>This helps the bacter to survive but I don't understand why, what are the 
>advantages in changing the form? How does it happens biochemically?

Shape is determined by various proteins the bacteria make. Many
microbes (bacteria and fungi) are dimorphic -- growing with different
shapes depending on conditions. I do not know whether the details are
known for this case, but they are being worked out for some bacteria.

The shape is not a cause of the better survival, but a side effect of
the change made. 

bob



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