Canadian Medical Guide > Organisms > Bacteria > Proteobacteria > Alphaproteobacteria Terms and Definitions

Alphaproteobacteria

Medical Definition:	A class in the phylum PROTEOBACTERIA comprised mostly of two major phenotypes: purple non-sulfur bacteria and aerobic bacteriochlorophyll-containing bacteria.
Guide Notes:	DF: ALPHAPROTEOBACT

Alphaproteobacteria Categories.

	Beijerinckiaceae - A family of aerobic gram-negative rods that are nitrogen fixers. They are highly viscous, and appear as a semitransparent slime in giant colonies.
	Holosporaceae - A family of bacteria comprised of endosymbionts of PROTOZOA.
	Hyphomicrobiaceae - A family in the order Rhizobiales, class ALPHAPROTEOBACTERIA comprised of many genera of budding or appendaged bacteria.
	Methylocystaceae - A family of gram-negative methanotrophs in the order Rhizobiales, distantly related to the nitrogen-fixing and phototrophic bacteria.
	Rhodobacteraceae - A family in the order Rhodobacterales, class ALPHAPROTEOBACTERIA.
	Rhodospirillales - An order of photosynthetic bacteria representing a physiological community of predominantly aquatic bacteria.
	Sphingomonadaceae - A family of gram-negative, asporogenous rods or ovoid cells, aerobic or facultative anaerobic chemoorganotrophs. They are commonly isolated from SOIL, activated sludge, or marine environments.

Alphaproteobacteria Medical Definitions and Terms

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