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Proteus spp

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Proteus mirabilis under light microscopy[1]

Proteus spp are a Gram-negative, anaerobic commensal proteobacteria normally found on dog skin and gastrointestinal tracts.

Species which are pathogenic to dogs include:

  • Proteus mirabilis

Clinically, Proteus are regularly involved in bacterial infections in neonatal puppies[2], but are sometimes associated with cystitis[3], paronychia and otitis externa[4].

Diagnosis is based on microbial culture or PCR assay identification[5].

These bacteria are usually sensitive to ampicillin, cefovecin, enrofloxacin, pradofloxacin[6] and metronidazole.


  1. First 6
  2. Münnich A (2008) The pathological newborn in small animals: the neonate is not a small adult. Vet Res Commun 32(1):S81-S85
  3. Ball KR et al(2008) Antimicrobial resistance and prevalence of canine uropathogens at the Western College of Veterinary Medicine Veterinary Teaching Hospital, 2002-2007. Can Vet J 49(10):985-990
  4. Zamankhan Malayeri H et al (2010) Identification and antimicrobial susceptibility patterns of bacteria causing otitis externa in dogs. Vet Res Commun 34(5):435-444
  5. Gómez-Muñoz MT et al (2012) Development of a specific polymerase chain reaction assay for the detection of Basidiobolus. Mycologia 104(2):585-591
  6. Silley P et al (2012) Bactericidal properties of pradofloxacin against veterinary pathogens. Vet Microbiol 157(1-2):106-111