Bacteroidetes

Bacteroidetes

Taxobox
name = Bacteroidetes
regnum = Bacteria
phylum = Bacteroidetes
subdivision_ranks = Classes
subdivision =
Bacteroidetes
Flavobacteriaceae
Flexibacteraceae
Rhodothermus
Sphingobacterium
The phylum Bacteroidetes is composed of three large classes of bacteria that are widely distributed in the environment, including in soil, in sediments, sea water and in the guts of animals.

By far, the Bacteroidales class are the most well-studied, including the genus "Bacteroides" (an abundant organism in the feces of warm-blooded animals including humans), and "Porphyromonas", a group of organisms inhabiting the human oral cavity.

Members of the genus "Bacteroides" are opportunistic pathogens. Rarely are members of the other two classes pathogenic to humans.

Researcher Jeffrey Gordon and his colleagues found that obese humans and mice had intestinal flora (gut flora) with a lower percentage of a family of bacteria called Bacteroidetes and more Firmicutes. However, they are unsure if Bacteroidetes prevent obesity or if these intestinal flora are merely preferentially selected by intestinal conditions in those who are not obese.cite journal |author=Ley R, Bäckhed F, Turnbaugh P, Lozupone C, Knight R, Gordon J |title=Obesity alters gut microbial ecology |journal=Proc Natl Acad Sci U S A |volume=102 |issue=31 |pages=11070–5 |year=2005 |pmid=16033867 |doi=10.1073/pnas.0504978102] cite journal |author=Ley R, Turnbaugh P, Klein S, Gordon J |title=Microbial ecology: human gut microbes associated with obesity |journal=Nature |volume=444 |issue=7122 |pages=1022–3 |year=2006 |pmid=17183309 |doi=10.1038/4441022a] cite journal |author=Turnbaugh P, Ley R, Mahowald M, Magrini V, Mardis E, Gordon J |title=An obesity-associated gut microbiome with increased capacity for energy harvest |journal=Nature |volume=444 |issue=7122 |pages=1027–31 |year=2006 |pmid=17183312 |doi=10.1038/nature05414]

References

External links

*cite web | author= Borenstein S | title= scientists link weight to gut bacteria | work=Sci-Tech Today | url=http://www.sci-tech-today.com/story.xhtml?story_id=110002BRSOJY | date=2006-12-21 | accessdate=2007-02-09
*Pubmed references:


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