ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (11): 2078-2084.doi: 10.11843/j.issn.0366-6964.2015.11.022

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Pharmacokinetic of Marbofloxacin in Infancy Yellow Cattle after Single Intramuscular Administrations and ex vivo the Post-antibiotic Effects

CAO Chang-fu,SUN Mei-zhen,LU Yan,ZENG Qing-lin,LIU Wei,ZENG Zhen-ling*   

  1. (National Reference Laboratory of Veterinary Drug Residues(SCAU),College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China)
  • Received:2015-03-17 Online:2015-11-23 Published:2015-11-23

Abstract:

This experiment was conducted to study the pharmacokinetics parameters of marbofloxacin after single intramuscular administration in infancy yellow cattle and the Post-antibiotic effects(PAE) of marbofloxacin against Pasteurella multocida in serum.Marbofloxacin was administered to 5 healthy infancy yellow cattle at a dose of 2 mg•kg-1 of body weight,the concentrations of marbofloxacin in serum were determined by high-performance liquid chromatography and marbofloxacin concentration-time data in serum were analyzed using non-compartmental analysis of WinNolin6.2 programme.Furthermore,PAE of marbofloxacin against Pasteurella multocida were tested in serum collected at predetermined time point.The main pharmacokinetic parameters intramuscularly were as follows:Cmax=2.04 μg•mL-1Tmax=0.83 h,AUC=15.03 h•μg•mL-1AUMC =138.67 h•h•μg•mL-1MRT =9.17 h,t1/2β=9.00 h,Vd=1.80 L•kg-1CL/F= 0.14 L•(h•kg)-1.The PAE of marbofloxacin against P.multocida at the concentration levels of 2MIC,4MIC,8MIC in serum were 1.90,2.65,3.50 h respectively.It was noted that marbofloxacin was relatively rapidly absorbed,widely distributed and slowly eliminated after intramuscular administration.The PAE of marbofloxacin against P.multocida in serum was obviously prolonged and dependent on concentration.

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