Lameness in Layer Breeder Flock of Namakkal District, Tamil Nadudue to Staphylococcus Aureus

摘要

Thirteen weeks old layer breeder birds were brought to the Department of Veterinary Microbiology, VCRI, Namakkal with a history of lameness followed by dehydration and mortality of six to eight birds daily. On postmortem examination, femoral head necrosis was observed in all the birds. Pure culture of Staphylococcus aureus was isolated from dead birds and it was confirmed by staining, cultural and biochemical tests. Antibiotic sensitivity test was carried out and it showed sensitivity to amoxycillin,gentamicin, chloramphenicol, enrofioxacin and ciprofloxacin and intermediate sensitivity to ampicillin, streptomycin and Penicillin G. The affected flock was treated with amoxicillin at the dose rate of 10 mg/kg body weight through drinking water for four days. The flock recovered from lameness completely after the treatment.