Procedures to eliminate M. hyo and produce M. hyo free pigs: an update

摘要

Mycoplasma hyopneumoniae (M. hyo), the cause of enzootic pneumonia, is generally accepted to be the most common porcine respiratory pathogen worldwide. M. hyo infections play a significant role in the mycoplasma induced respiratory disease complex (MIRD-complex), affecting productivity and medical expenses in most pig producing countries. To control the MIRD-complex new tools have become available in recent years. Clinical trials with mycoplasma vaccines have shown a reduction in the prevalence of pigs with pneumonia together with an increase in daily weight gain (12). Furthermore a new eradication program for M. hyo (the so-called Swiss-method) using partly depopulation has been tested with success in several European countries: Denmark, Norway and Switzerland (2, 7, 13).