Vol. 9, Issue 3, Part H (2024)

Author(s): Ajomol Joy, Binu K Mani, Ambily R, Naicy Thomas and Hemanth Ajayan

Abstract: The study was carried out to isolate and identify bacteria from gastro-intestinal tract infections in chicken. The isolates were subjected to antibiogram studies. The samples comprised 50 swabs from the enteric tract of dead chicken with a history of diarrhoea and were brought for post-mortem examination to the Department of Veterinary Pathology, College of Veterinary and Animal Sciences, Mannuthy. Out of the 72 isolates obtained, 43 were identified as Escherichia coli along with seven Klebsiella pneumoniae, three Salmonella paratyphi A, 11 Proteus spp., three Citrobacter spp. and five Staphylococcus aureus based on colony morphology, Gram staining and various biochemical tests. Antibiotic resistance was detected against commonly used antibiotics using the Kirby-Bauer disc diffusion method. Most of the isolates exhibited a high degree of resistance to antibiotics such as clindamycin and methicillin and varying degrees of susceptibility to other antibiotics.