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Isolation, Identification and Antibacterial Resistance Spectrum of Bacterial Pathogens of Respiratory Tract Infection in a Large-Scale Cattle Farm

Isolation, Identification and Antibacterial Resistance Spectrum of Bacterial Pathogens of Respiratory Tract Infection in a Large-Scale Cattle Farm

Yunxia Guo1, Xia Zhou1*, Xin Huang2 and Fagang Zhong2

1College of Animal Science and Technology, Shihezi University, Shihezi 832003, China.
2State Key Laboratory of Sheep Genetic Improvement and Healthy Breeding, Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi 832000, China.
 
* Corresponding author: xzhou88@yahoo.com

ABSTRACT

The current study aimed to report the bacterial pathogens and their antibacterial resistance spectrum causing bovine respiratory tract infections in a large-scale cattle farm. Nasopharyngeal swabs were collected from animals (n=122) having clinical manifestations of respiratory tract diseases. Standard culture procedure followed by the Kirby-Bauer disc diffusion assay was applied to calculate the antimicrobial resistance profile of bacterial isolates. The survey results showed that bronchitis and bronchopneumonia were commonly occurring respiratory diseases in cattle. The highest incidence of bacterial organism Staphylococcus aureus (83.6%), followed by Streptococcus pneumoniae (80.3%) and Klebsiella pneumoniae (77.0%) were recorded in the respiratory tract samples. Pasteurella multocida, Bacillus obstructivus and Mycoplasma alkalescens exhibited 100% resistance against penicillin, while Bacillus subtili and M. alkalescens showed 100% resistance against tetracycline. Mycoplasma dispar, B. subtilis, M. alkalescens, B. obstructivus, and Stah. aureus against cefoxitin; and M. alkalescens, and Microccus luteus against cefoperazone exhibited ≥90% resistance. Overall, the majority of bacterial isolates exhibited ≥70% resistance against many antimicrobials. The antimicrobial spectrum profiles whistle an alarming situation for the regulatory bodies to cut the non-judicial use of antimicrobial agents.

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Pakistan Journal of Zoology

February

Pakistan J. Zool., Vol. 56, Iss. 1, pp. 01-501

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