Felis ISSN 2398-2950

Peptostreptococcus spp

Synonym(s): P. spp

Contributor(s): Richard Walker




  • Genus: Peptostreptococcus.
  • Family: Peptostreptoccaceae.


  • Gk: pepto- cook, digest; streptococcus- the generic name.

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Clinical Effects



  • Part of normal flora of gastrointestinal tract.


  • Reproduces by binary fission in the gastrointestinal tract, or under aerobic or anaerobic conditions.
  • Does not form spores.


  • Direct or indirect.

Pathological effects

  • Dogs and cats - oropharyngeal and pleuropulmonary infections, other suppurative infections, eg bite wounds.
  • Combination of Actinomyces pyogenes  Actinomyces pyogenes and an anaerobe, eg Peptostreptococcus indolicus  →   'summer mastitis' in cattle.

Other Host Effects

  • Part of normal flora together with other non-sporing anaerobes.


Control via chemotherapies


  • None.


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Further Reading


Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Jang S S, Breher J E, Dabaco L A et al (1997) Organisms isolated from dogs and cats with anaerobic infections and susceptibility to selected antimicrobial agents. JAVMA 210 (11), 1610-1614 PubMed.
  • Dow S W & Jones R L (1987) Anaerobic infections. I. Pathogenesis and clinical significance. Comp Cont Ed Pract Vet (7), 711-720 VetMedResource.
  • Dow S W, Jones R L, Adney W S (1986) Anaerobic bacterial infections and response to treatment in dogs and cats - 36 cases (1983-1985). JAVMA 189 (8), 930-934 PubMed.
  • Hirsch D C, Indiveri M C, Jang S S et al (1985) Changes in prevalence and susceptibility of obligate anaerobes in clinical veterinary practice. JAVMA 186 (10), 1086-1089 PubMed.
  • Johnson K A, Lomas G R, Wood K A (1984) Osteomyelitis in dogs and cats caused by anaerobic bacteria. Aust Vet J 61 (2), 57-61 PubMed.
  • Berg J N, Fales W H, Scanlan C M (1979) Occurrence of anaerobic bacteria in diseases of the dog and cat. Am J Vet Res 40 (6), 867-881 PubMed.