泰地罗新是广谱抗菌药,对一些革兰氏阳性和革兰氏阴性细菌均具有抗菌活性,对引起猪、牛呼吸系统疾病的病原菌尤其敏感,如胸膜肺炎放线杆菌、多杀性巴氏杆菌、支气管败血波氏杆菌、副猪嗜血杆菌以及溶血性曼海姆菌、睡眠嗜组织菌等。
泰地罗新常规剂量(4~12mg/kg体重)给药对猪血常规、生理生化指标没有任何影响,但5倍量注射可能引起心、肝、肾的损伤。林红等的研究结果也表明临床推荐剂量给药是安全的,临床上使用对牛也是安全的;无论静注还是肌注,泰地罗新对犬是安全的;羔羊静脉或皮下注射泰地罗新4mg/kg或6mg/kg体重是安全的,在治疗后2~10d内会引起注射部位轻度瘙痒、呼吸困难和咳嗽。Tildipirosin是一种半合成的大环内脂类抗菌素。Tildipirosin exhibits the inhibitory effect on C. coli species, and 23 of 31 (74%) isolates have MICs of 8 or 16 μg/mL while 8 of 31 (26%) have MIC >256 μg/mL. MICs against C. jejuni are 8-64 μg/mL. Tildipirosin against S. enterica and E. coli are 2-8 μg/mL. Tildipirosin inhibits the treponeme isolates form from CODD lesions from 19 sheep, with MIC90 of 0.0469 mg/L. The P. multocida B130 clones show the MIC of 0.25 mg/L for tildipirosin. The 10 P. multocida isolates that carry only erm(42) exhibit MIC of 16-32 mg/L for tildipirosin. The single M. haemolytica that harbours only erm(42) shows MIC of 32 mg/L for tildipirosin.
The mean percentage of lung consolidation for tildipirosin (4 mg/kg, s.c.)-treated calves is significantly lower than those for tulathromycin-treated and control calves. Metaphylactic administration of tildipirosin to calves 5 days prior to H somni challenge prevents subsequent culture of the pathogen from bronchial secretions and is more effective in minimizing clinical disease and lung lesions than is metaphylactic administration of tulathromycin.