EFFICACY OF THE INACTIVATED MYCOPLASMA VA CCINE STELLAMUNE(R) MYCOPLASMA IN 2 PIG HERDS OF THE FEDERAL HYBRID BREEDING PROGRAM

A descriptive study with the inactivated M. hyopneumoniae vaccine Stel lamune(R) Mycoplasma front Pfizer Inc. was conducted in two pig heads of the Federal Hybrid Breeding Programme with chronic respiratory dise ases in young boars and gilts. A high seroprevalence of M. hyopneumoni ae-, PRRS-, A. pleuropneumoniae- and influenza-infections was detected prior to,vaccination. Typical clinical symptoms of PRRS were observed in herd A. Pleuritis was found in selected pigs of herd B at slaughte r. In these conditions the following results were found in vaccinated animals: increase of daily weight gain by up to 66.4 g (herd A), reduc tion of the frequency and severity of pneumonia in selected animals by up to 48.5% (herd B) and 72,2% (herd A) respectively as well as consi derable savings of medicaments. All indirect influence of the mycoplas ma vaccination on PRRS, A. pleuropneumoniae and influenza infections i s discussed.