| peptococcus | A genus of gram-positive, anaerobic, coccoid bacteria that is part of the normal flora of the mouth, upper respiratory tract, and large intestine in humans. Its organisms cause infections of soft tissues and bacteraemias. (12 Dec 1998) |
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| Peptococcus aerogenes | Former name for Peptostreptococcus asaccharolyticus. (05 Mar 2000) |
| Peptococcus asaccharolyticus | Former name for Peptostreptococcus asaccharolyticus. (05 Mar 2000) |
| Peptococcus constellatus | A species found in tonsils, purulent pleurisy, appendix, the nose, throat, and gums, and infrequently on the skin and in the vagina. (05 Mar 2000) |
| Peptococcus niger | A species found once, in the urine of an aged woman; type species of the genus Peptococcus. (05 Mar 2000) |