Unidad de Epidemiología y Medicina Preventiva, Instituto Universitario de Sanidad Animal y Seguridad Alimentaria, Universidad de Las Palmas de Gran Canaria, C/Trasmontana s/n, 35413, Arucas, Gran Canaria, Spain.
BMC Vet Res. 2020 Sep 3;16(1):324. doi: 10.1186/s12917-020-02512-2.
Mycoplasma (M.) hyopneumoniae, M. hyorhinis and M. hyosynoviae are significant pathogens for the porcine industry worldwide. The aim of the present study was to determine the antimicrobial susceptibility of six key antimicrobials (tylosin, tilmicosin, tylvalosin, lincomycin, tiamulin and valnemulin) routinely used for treating infections caused by these pathogens. Twenty-seven M. hyopneumoniae, 48 M. hyorhinis and 40 M. hyosynoviae field strains isolated from clinical samples from different Southern European countries between 2013 and 2018 using broth microdilution method were evaluated.
Tylvalosin exhibited the highest in vitro activity among the macrolides assayed, with MIC values 4 to 5 two-fold dilutions lower than those of tylosin and tilmicosin. The pleuromutilin valnemulin showed one of the highest in vitro activities against the three mycoplasma species. On the contrary, lincomycin exhibited the highest MIC values of the antimicrobials tested.
The data obtained in the present study supports the use of pleuromutilins and macrolides for the control of infections caused by porcine mycoplasmas. The use of lincomycin for the treatment of porcine mycoplasma infections should be carefully evaluated due to the presence of circulating field isolates with decreased susceptibility to this antimicrobial.
猪肺炎支原体(M. hyopneumoniae)、猪鼻支原体(M. hyorhinis)和猪滑液支原体(M. hyosynoviae)是全球范围内对养猪业具有重要影响的病原体。本研究旨在测定六种常用于治疗这些病原体引起的感染的关键抗菌药物(泰乐菌素、替米考星、替米考星、泰万菌素、沃尼妙林和沃尼妙林)的药敏性。2013 年至 2018 年间,从不同南欧国家的临床样本中分离出 27 株 M. hyopneumoniae、48 株 M. hyorhinis 和 40 株 M. hyosynoviae ,采用肉汤微量稀释法进行了评估。
在检测的大环内酯类药物中,泰万菌素表现出最高的体外活性,其 MIC 值比泰乐菌素和替米考星低 4 至 5 倍稀释度。截短侧耳素类沃尼妙林对三种支原体的体外活性最高。相反,林可霉素表现出测试的抗菌药物中最高的 MIC 值。
本研究获得的数据支持使用截短侧耳素类和大环内酯类药物来控制猪支原体引起的感染。由于存在对这种抗菌药物敏感性降低的循环田间分离株,因此应谨慎评估林可霉素用于治疗猪支原体感染。