 are members of the oral, vaginal, and gut microbiota and are often recovered from anaerobic infections of the respiratory tract.These infections include aspiration pneumonia, lung abscess, pulmonary empyema, and chronic otitis media and sinusitis.They have been isolated from abscesses and burns in the vicinity of the mouth, bites, paronychia, urinary tract infection, brain abscesses, osteomyelitis, and bacteremia associated with upper respiratory tract infections.