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Mycoplasma felis and Equine influenza

Saturday, December 15, 2018

(AL) Mycoplasma felis and Equine influenza were detected from a nasal swab in a three year old QH mare submitted for testing using the AHDC Equine Respiratory PCR Panel (ERPLN). The mare had recently traveled to a barrel racing competition and she developed a cough, swollen submandibular lymph nodes, nasal discharge, abnormal respiratory sounds (squeaks/pleural rubs) and lethargy soon after returning home.

Mycoplasma felis has been associated with respiratory disease, typically concurrent with a viral etiology. There have been seven positive M. felis PCR samples out of 306 nasal swab submissions in 2018, which is a 2% prevalence of those horses tested. Mycoplasma agents are not isolated easily and may be missed in routine aerobic culture unless a selective media is used. A request for Mycoplasma culture or PCR must be added to a nasal swab, transtracheal wash, or bronchoalveolar lavage. Consider adding this agent to your differential in respiratory cases.