ISSN 2398-2977      

Pseudomonas aeruginosa


Synonym(s): P. aeruginosa




  • Family: Pseudomonaceae.
  • Genus:Pseudomonas.


  • Gk:pseudes-false;monas- a unit, alone.
  • Latin:aeruginosa- full of copper rust or verdigris, hence green.

Active Forms

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Clinical Effects



  • Ubiquitous in the environment, especially in damp, poorly ventilated areas.
  • May be carried in the intestinal tract of healthy animals.


  • Multiplies in environment by binary fission.
  • Non-spore-forming.


  • Infection may be endogenous or exogenous.

Pathological effects

  • Immunodeficiency, trauma and antibiotic therapy all predispose to infection withP. aeruginosa.
  • P. aeruginosahas pili   →   adherence to epithelial cells.
  • Exotoxins, endotoxin and extracellular products - all may play a role in pathogenesis.
  • Some strains have an antifagocytic capsule.
  • Causes wide variety of infections in many species, eg mastitis in cattle, sheep and goats, metritis, ocular and respiratory infections in horses, otitis and cystits in dogs, hemorrhagic pneumonia in mink and necrotic lesions in reptiles.

Other Host Effects

  • Widely found in the environment and as part of the normal flora of the gastrointestinal tract and mucous membranes of animals.


Control via animal

  • Strict hygiene.
  • Judicious use of antimicrobial therapy.

Control via chemotherapies

  • Drug resistance related to R factors is a problem.
  • Strains may be resistant to all systemic antibiotics routinely tested.
  • Usually susceptible to gentamicin   Gentamicin  , tobramycin, amikacin   Amikacin  and carbenicillin, but antimicrobial susceptibility test recommended.
  • Tetracycline reaches bactericidal concentrations againstP. aeruginosain urine.
  • Most pseudomonads are susceptible to levels of antimicrobial agents in otic preparations, including neomycin, polymysin, chloramphenicol and gentamicin.

Control via environment

  • Clean, dry and disinfect fomites and hospital environments where immunocompromised animals are present.


This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Further Reading


Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Moore et al (2001) Molecular surveillance of the incidence of Taylorella equigenitalis and Psedomonas aeruginosa from horses in Ireland by sequence-specifice PCR. Equine Vet J 33 (3), 319-322 PubMed.
  • Govan J R W, Sarasola P, Taylor D J et al (1992) Isolation of a mucoid alginate-producing Pseudomonas aeruginosa strain from the equine guttural pouch. J Clin Microbiol 30 (3) 595-599 PubMed.

Other sources of information

  • Horserace Betting Levy Board (2016) Codes of Practice. 5th Floor, 21 Bloomsbury Street, London WC1B 3HF, UK. Tel: +44 (0)207 333 0043; Fax: +44 (0)207 333 0041; Email:; Website:

Can’t find what you’re looking for?

We have an ever growing content library on Vetlexicon so if you ever find we haven't covered something that you need please fill in the form below and let us know!


To show you are not a Bot please can you enter the number showing adjacent to this field

 Security code