›› 2018, Vol. 45 ›› Issue (12): 3535-3544.doi: 10.16431/j.cnki.1671-7236.2018.12.027

Previous Articles     Next Articles

Research on Etiology of Bovine Respiratory Disease Complex in Guangxi During 2016 to 2017

WU Cuilan1,2, PENG Hao1,2, LI Jun1,2, LI Changting1,2, TAO Li1,2, WANG Qiuhua3, PAN Yan1,2, HAN Linmei3, CHEN Zexiang1,2, ZENG Yun3   

  1. 1. Guangxi Veterinary Research Institute, Nanning 530001, China;
    2. Guangxi Key Laboratory of Veterinary Biotechnology, Nanning 530001, China;
    3. College of Animal Science and Technology, Guangxi University, Nanning 530005, China
  • Received:2018-06-12 Online:2018-12-20 Published:2018-12-21

Abstract:

To understand the etiology situation of bovine respiratory disease complex (BRDC) in Guangxi,117 samples with respiratory diseases during 2016 to 2017 were diagnosed by RT-PCR/PCR method and bacterial isolation and identification method.And the antibiotic susceptibility test of the main isolates were carried out.The results showed that detection rates of Klebsiella pneumoniae,Mycoplasma bovis,Trueperella pyogenes,Pasteurella multocida,IBRV and Mannheimia haemolytica were 41.0%(48/117),28.2%(33/117),20.5%(24/117),15.4%(18/117),12.8%(15/117) and 5.1%(6/117) detected by RT-PCR/PCR method,while the detection rates of Klebsiella pneumoniae,Escherichia coli,Mycoplasma bovis,Trueperella pyogenes,Pasteurella multocida and Mannheimia haemolytica by bactorial isolation and identification method were 41.0%(48/117),33.3%(39/117),17.1%(20/117),7.7%(9/117),2.6%(3/117) and 2.6%(3/117),indicating the former had the better sensibility,and BPIV3,BRSV and BVDV had not been detected.The results of antibiotic susceptibility tests showed that resistance rates of 20 Mycoplasma bovis strains against β-lactams,sulfonamides and peptides were from 90.0% to 100.0%,and they were sensitive to quinolones,gentamicin,amikacin and kanamycin (resistance rates were 10.0% to 25.0%).30 Escherichia coli strains and 30 Klebsiella pneumoniae strains were sensitive to cefotaxime,ceftriaxone and ceftazidime (13.3% to 20.0%,10.0% to 30.0%,respectively),and they were resistant to other 15 kinds of drugs (50.0% to 100.0%,40.0% to 100.0%,respectively).The results indicated that mixed infection was dominant in bovine respiratory disease in Guangxi caused by Mycoplasma bovis,Escherichia coli and Klebsiella pneumoniae which had developed different degrees of drug resistance.

Key words: bovine respiratory disease complex (BRDC); etiology investigation; Guangxi; drug resistance analysis

CLC Number: