Abstract:

Field evaluation of a new single-dose Mycoplasma hyopneumoniae bacterin effects on growth performance

SooHwan Kim, DVM; Taehwan Oh, DVM; Siyeon Yang, DVM; Kee Hwan Park, DVM; Hyejean Cho, MS; Chanhee Chae, DVM, PhD

PDF version is available online.

Objective: Evaluate the efficacy of a new single-dose bacterin against Mycoplasma hyopneumoniae under field conditions.

Materials and methods: Three separate farms were selected based on their history of enzootic pneumonia. On each farm, vaccinated pigs (n = 20; 10 male and 10 female) were administered a single dose of the M hyopneumoniae bacterin at 21 days of age while unvaccinated pigs (n = 20; 10 male and 10 female) were administered a single dose of phosphate buffered saline at the same age.

Results: Vaccination against M hyopneumoniae reduces the severity of lung lesions and clinical signs such as coughing, which leads to improved growth performance of the pig. Vaccinated pigs had a significantly higher (P = .02 for farm A, P = .02 for farm B, and P = .02 for farm C) average daily weight gain between 21 to 175 days old (0 to 154 days post vaccination) and elicited cell-mediated immunity, as measured by M hyopneumoniae-specific interferon-γ secreting cells, when compared with unvaccinated pigs located at all 3 farms.

Implications: The data presented in this field study demonstrated that the M hyopneumoniae bacterin improved growth performance effectively in 3 farms suffering from enzootic pneumonia.

Keywords: enzootic pneumonia, Mycoplasma hyopneumoniae, vaccine

Cite as: Kim S, Oh T, Yang S, Park KH, Cho H, Chae C. Field evaluation of a new single-dose Mycoplasma hyopneumoniae bacterin effects on growth performance. J Swine Health Prod 2021;29(4):180-188.

Search the AASV web site for pages with similar keywords.