ANTIMICROBIAL SUSCEPTIBILITY OF MYCOPLASMA HYOPNEUMONIAE AND MYCOPLASMA HYORHINIS DURING 2006-2007 IN THAILAND

摘要

Mycoplasma hyopneumoniae (M. hyo) is the causative agent of Enzootic pneumonia, which is one of the most important respiratory diseases in the swine industry worldwide. Mycoplasma hyorhinis (M. hyr) which causes pleuritis, peritonitis, pericarditis, polyserositis and arthritis is a frequently occurring pathogenic microorganism in swine and considered one of the major pathogens affecting young pigs in Thailand (2). We previously reported the minimal inhibitory concentrations (MIC) of antimicrobials against M. hyo and M. hyr in 2002 (1) and 2006 (2), respectively. However, the effectiveness of specific drugs against respiratory pathogens may change after use of those drugs for many years. Thus, in the present study, the in vitro efficacy of five antimicrobial agents was investigated against Mycoplasmal pathogens. Those were isolated from diseased pigs collected during 2006-2007 in order to evaluate trends of antibiotic resistance.