Peptostreptococcus spp. (and Finegoldia magna)
MICROBIOLOGY
- Anaerobic Gram-positive cocci: part of the normal flora of the mouth, GI and GU tracts, and skin.
- A heterogeneous group of "anaerobic streptococci" is now classified into five groups, and changes in the taxonomy can be confusing.
- Peptoniphilus lacrimalis, P. ivorii, Anaerococcus octavius, Peptostreptococcus anaerobius and Micromonas micros.
- Others were reclassified. For example, Finegoldia magna is the former Peptosteptococcus magnus.
- Small cocci may be seen on Gram stain in short chains and pairs.
- GPC may appear identical to aerobic streptococci (chains) or staphylococci (clusters) [Fig].
- Non-spore forming
- Peptostreptococcus (which includes the former Peptococcus) accounts for nearly all anaerobic GPC except Finegoldia magna.
- Most common and important: Finegoldia magna, P. asaccharolyticus.
- Less common: P. micros, P. anaerobius.
- Note: Microaerophilic streptococci, such as Streptococcus intermedius Group, are pathogenic and often important in mixed infections.
- They are not Peptidostreptococci and are not sensitive to metronidazole.
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Last updated: June 9, 2024
Citation
Auwaerter, Paul G. "Peptostreptococcus Spp. (and Finegoldia Magna)." Johns Hopkins ABX Guide, The Johns Hopkins University, 2024. Pediatrics Central, peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540426/all/Peptostreptococcus_spp___and_Finegoldia_magna_.
Auwaerter PG. Peptostreptococcus spp. (and Finegoldia magna). Johns Hopkins ABX Guide. The Johns Hopkins University; 2024. https://peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540426/all/Peptostreptococcus_spp___and_Finegoldia_magna_. Accessed December 7, 2024.
Auwaerter, P. G. (2024). Peptostreptococcus spp. (and Finegoldia magna). In Johns Hopkins ABX Guide. The Johns Hopkins University. https://peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540426/all/Peptostreptococcus_spp___and_Finegoldia_magna_
Auwaerter PG. Peptostreptococcus Spp. (and Finegoldia Magna) [Internet]. In: Johns Hopkins ABX Guide. The Johns Hopkins University; 2024. [cited 2024 December 07]. Available from: https://peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540426/all/Peptostreptococcus_spp___and_Finegoldia_magna_.
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