Antibiogram of bacterial isolates originated from clinical infections of dog in Kolkata, West Bengal

Prevalent aerobic bacteria in 66 clinical samples belonging to diverse clinical conditions such as pyoderma and wound (n = 24), keratitis (n = 6), otitis (n = 10), pyometra (n = 12) and urinary tract infections (n = 14) of dogs in Kolkata, West Bengal, were detected by standard bacteriological methodology. Antibiotic sensitivity of the isolated bacterial cultures (n = 72) were performed by disc diffusion method against 13 antimicrobials. Staphylococcus sp. were most prevalent isolates (57.6%) followed by Escherichia coli (36.4%). Majority of E. coli (91.7%) isolates were found to be cefotaxime resistant indicating high prevalence of extended spectrum beta-lactamases. However, E. coli (n = 24) isolates were found to be highly sensitive to amikacin (75.0%) and levofloxacin (50%), Staphylococcus sp. (n = 38) to amikacin (88.9%) and gatifloxacin (66.7%), Pseudomonas aeruginosa (n = 6) to amikacin (100%), and gatifloxacin (66.7%) and Proteus mirabilis (n = 4) were 100% sensitive to amikacin, azithromycin, gentamicin and gatifloxacin. The bacterial isolates (n = 72), in general, were found highly resistant to ampicillin–sulbactum (94.4%), amoxicillin–clavulanic acid (86.1%), ceftizoxime (91.7%), cotrimoxazole (77.8%) and tetracycline (75%) which were least effective antimicrobials for treatment. This antimicrobial sensitivity study may be useful to veterinary clinicians for better management of clinical infections of dog.