microaerophile

Some do not consider it a true obligate microaerophile.

Streptococcus pyogenes, a well known microaerophile that causes streptococcal pharyngitis.

A. sulfidicus is an obligate microaerophile that oxidizes sulfides and is an autotrophic producer of filamentous sulfur.

A microaerophile is a microorganism that requires oxygen to survive, but requires environments containing lower levels of oxygen than are present in the atmosphere ( 20% concentration).

Rarely Lemierre's syndrome is caused by other (usually Gram-negative) bacteria, which include Bacteroides fragilis and Bacteroides melaninogenicus, Peptostreptococcus spp., Streptococcus microaerophile, Staphylococcus aureus, and Eikenella corrodens.