Definition: An obligatorily anaerobic genus of gram-positive, non-spore-bearing bacteria that appear as cocci and coccobacilli, sometimes in short chains. The type species is Atopobium parvulus, a slow-growing organism forming tiny colonies on standard media. formerly called Peptostreptococcus parvulus and Streptococcus parvulus.
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Examples: glitazone, GI cocktail, etc.