SEROEPIDEMIOLOGICAL STUDY IN A THREE MULTIPLE SITE PIG FARM TO EVALUATE A VACCINATION PROGRAM TO CONTROL ENZOOTIC PNEUMONIA

摘要

Enzootic pneumonia, is a world wide distributed disease, that causes financial losses, due to lung lesions. Some authors report prevalence of 100%, with daily weight gains of 16 to 30% under the expected results. Diagnosis could be done by descriptionof lung lesions, isolation of the organism, microscopic lesions, direct immunofluorescence, P.C.R. and serological profiles (3,4). There are some methods to control enzootic pneumonia, such as early weaning programs, antimicrobial treatments and vaccines. Vaccination of piglets is generally recommended at 1 and 3 weeks of age and sows during gestation (1,2). The aim of the present study was to evaluate serological results of Mycoplasma hyopneumoniae vaccinated sows and not vaccinated ones, and productive performance from their descendants, on a three multiple site farm in Mexico.