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Related Experiment Video

Updated: May 28, 2026

The Bovine Lung in Biomedical Research: Visually Guided Bronchoscopy, Intrabronchial Inoculation and In Vivo Sampling Techniques

The Bovine Lung in Biomedical Research: Visually Guided Bronchoscopy, Intrabronchial Inoculation and In Vivo Sampling Techniques

Published on: July 3, 2014

Corynebacterium equi in cattle and pigs.

M D Mutimer¹, J B Woolcock

¹a Department of Veterinary Pathology and Public Health , University of Queensland , St. Lucia , Queensland , 4067 , Australia.

The Veterinary Quarterly

|November 2, 2011

Summary

Corynebacterium equi was detected in 35% of pig lymph nodes and 35% of pig fecal samples. This bacterium was not found in cattle lymph nodes but was present in 50% of cattle fecal samples.

Area of Science:

Veterinary Microbiology
Bacterial Pathogenesis
Zoonotic Disease Research

Background:

Corynebacterium equi, now known as Rhodococcus equi, is an important bacterial pathogen in foals.
Information regarding its prevalence in swine and cattle, particularly in lymph nodes and fecal samples, is less documented.

Purpose of the Study:

To investigate the presence and prevalence of Corynebacterium equi in porcine and bovine populations.
To determine if Corynebacterium equi can be isolated from lymph node tissues and fecal samples of pigs and cattle.

Main Methods:

Bacteriological examination of cervical lymph nodes from pigs.
Analysis of retropharyngeal and submandibular lymph nodes from cattle.
Culture and identification of Corynebacterium equi from fecal samples of both species.

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Main Results:

Corynebacterium equi was isolated from 35% of examined porcine cervical lymph nodes (19 out of 54).
The organism was not detected in any of the examined bovine retropharyngeal and submandibular lymph nodes (0 out of 54).
Corynebacterium equi was recovered from 50% of bovine fecal samples (15 out of 30) and 35% of porcine fecal samples (11 out of 31).

Conclusions:

Corynebacterium equi is present in the gastrointestinal tract of both pigs and cattle, as indicated by fecal shedding.
While pigs harbor the bacteria in their cervical lymph nodes, cattle do not appear to carry it in the examined lymph node sites.
These findings highlight the potential for Corynebacterium equi transmission and reservoirs in these animal species.