Date Full Report Received


Date Abstract Report Received



Primary Investigator:

Mycoplasma hyorhinis and M. hyosynoviae are important emerging pathogens in swine in the US. Disease caused by M. hyorhinis is clinically expressed in the form of polyserositis and arthritis in recently weaned pigs. Mycoplasma hyosynoviae causes arthritis and consequent lameness that affects adult pigs close to market age. Thus, infection with these two microorganisms represents a heavy burden for the swine producer, not only in the form of economic losses, but also in the poor welfare picture that the clinical condition can express. Little information is available about the epidemiology of these important pathogens, which makes establishing management and control strategies extremely difficult. Therefore, this research was performed to build the foundation for a more detailed understanding of M. hyorhinis and M. hyosynoviae detection and their correlation with clinical disease. Under the conditions of this investigation, M. hyorhinis was frequently detected in oral fluids in nursery and finisher sites regardless of the clinical presentation of lameness. Therefore, detection of M. hyorhinis in oral fluids may not be an informative tool for diagnosis of lameness in pig populations. However, a strong association was identified between pig lameness and M. hyosynoviae detection in oral fluids, which warrants detailed investigation, particularly based on pig age.