Mycoplasma hyorhinis associated with conjunctivitis in pigs

摘要

Mycoplasma hyorhinis is a commensal bacterium that primarily colonizes the upper respiratory tract of swine. This bacterium has also been reported as causative agent of pneumonia, polyserositis, polyarthritis, and otitis. A variety of infectious agents have been associated with conjunctivitis in pigs, including Classical Swine Fever virus (CSF), African Swine Fever virus (ASF), Pseudorabies virus (PRV), Chlamydia, Porcine Cytomegalovirus (PCMV), Influenza A virus (IAV) and Porcine Reproductive and Respiratory Syndrome virus PRRSv. Mycoplasma-like organisms were demonstrated to be involved in sporadic outbreaks of conjunctivitis in swine.'2 However, the significance of Mycoplasmas in the etiology of the conjunctivitis in swine is still unclear. The aim ol this study was to report outbreak investigation of conjunctivitis in three swine herds demonstrating M. hyorhinis as the potential causative agent of conjunctivitis by in situ hybridization (ISH) and PGR and comparing the results from clinically affected and non-affected animals.