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Updated: Jun 5, 2026

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice

Published on: March 17, 2014

Clonal complex Pseudomonas aeruginosa in horses.

Timothy J Kidd¹, Justine S Gibson, Susan Moss

¹Department of Infectious Diseases, Royal Children's Hospital, Queensland Children's Medical Research Institute, The University of Queensland, Brisbane, Australia. Tim_Kidd@health.qld.gov.au

Veterinary Microbiology

|December 25, 2010

Summary

Most equine genital Pseudomonas aeruginosa infections are not directly transmitted between horses. Molecular typing revealed clonally related strains in mares, suggesting alternative transmission routes for this common cause of endometritis.

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Area of Science:

Veterinary Microbiology
Equine Infectious Diseases

Background:

Pseudomonas aeruginosa is a significant cause of infectious endometritis in horses.
The venereal transmission of P. aeruginosa in horses is often assumed but lacks robust genotypic evidence.

Purpose of the Study:

To investigate the genetic relatedness of genital Pseudomonas aeruginosa isolates from Thoroughbred horses.
To evaluate the transmission dynamics of P. aeruginosa within a defined geographical region.

Main Methods:

Molecular strain typing using Enterobacterial Repetitive Intergenic Consensus (ERIC) PCR.
Analysis of 93 P. aeruginosa isolates from 53 mares and 18 stallions collected between 2005 and 2009.

Main Results:

P. aeruginosa was not detected in stallions.
57% of mares harbored clonally related P. aeruginosa strains.
A dominant genotype was identified in 45% of infected mares across 13 studs, indicating a common source or widespread clonal lineage.

Conclusions:

The findings challenge the prevailing venereal transmission hypothesis for equine genital P. aeruginosa.
Non-venereal acquisition pathways and strain adaptation are likely key factors in equine endometritis.
Further research into alternative transmission routes and host-pathogen interactions is warranted.