Vol. 11, Special Issue 12 (2022)

Author(s):
Yashas R Kumar, Nisha AR and Prejith

Abstract:
Mastitis is one of the most commonly occurring diseases of dairy animals. It is the most important cause of economic losses to the dairy industry in India and throughout the world. Hence, the present study designed to conduct with the main purpose to study the antibiotic sensitivity of fluroquinolones and tetracyclines class antibiotics and biofilm formation for major bacterial isolates known to cause mastitis in dairy herds. Bacterial isolates causing mastitis namely Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, Staphylococcus capitis, Staphylococcus schleiferi, Enterobacter aerogenes were procured from Department of Veterinary microbiology, Department of Veterinary public health Pookode, Kerala and Veterinary College, Shivamogga, Karnataka. The antibiotic susceptibility testing and biofilm formation tests were conducted. Antibiotic sensitivity test revealed that E. coli isolates revealed highest sensitivity to Tetracycline class antibiotics (oxytetracyclines, tetracyclines, doxycycline) and Fluroquinolones class antibiotics (Enrofloxacin, Norfloxacin, Ciprofloxacin and Ofloxacin) followed by extended spectrum beta-lactamase (ESBL) E. coli. In conclusion, tetracyclines class antibiotics were found to be more sensitive against mastitis causing microorganism as compared to fluroquinolones class antibiotics.