bifidobacteria, probiotics, Escherichia coli

Michele Clare nr08 at dial.pipex.com
Sun May 18 17:20:19 EST 1997

soulmate at picknowl.com.au wrote:
> To anyone with information on Bifidobacteria,
> I am currently writing a paper on the effects of Bifidobacteria on both
> E.coli levels and the effects on human health. If anyone has any
> referenced information (or internet references) on this, as well as as
> the following questions, this would be greatly appreciated. 1. What is
> the antibiotic that Bifidobacteria produces? Is it effective? 2. Why are
> older aged people more vulnerable to E.coli poisoning? 3. Does decreased
> Bifidobacteria levels increase the susceptibility of E.coli poisoning? 4.
> Can oral forms of Bifidobacteria be consumed? How? Is it effective? 5.
> Does fructooligosaccharides (FOS) promote Bifidobacteria growth? Does FOS
> have any other effects on the human body?
> Any prompt reply would be appreciated.
> Matthew
> soulmate at picknowl.com.au
> -------------------==== Posted via Deja News ====-----------------------
>       http://www.dejanews.com/     Search, Read, Post to Usenet

In a sample of food, such as a yogurt, the Bifidobacteria will
 lower the pH of the food to about 4.5 and the ordinary E.coli 
will die out within a few days. The verotoxic strain of E. coli
 O157 seems to be more resistant to acidic conditions. It could
 survive and the standard tests for E.coli (growth at 44 deg C )
 would indicate an absence of E.coli when in fact the O157 strain
were still present.

In a human body the situation would be different due to the 
body's effect on pH control. 

If a mixed batch of bacteria were eaten they would have to go 
through the acid stomach and survival of the bacteria would 
presumably depend on how much food was eaten and how much acid 
was present.

Have you seen the Bad Bug Book

Hope this helps   Michele

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