1Poultry Section, Haringhata Farm, Mohanpur, Nadia, Bengal
2Deptt. of Surgery, College of Veterinary Sciences
Bidhan Chandra Krishi Vishwavidyalaya, Mohanpur, Nadia, West Bengal
*Part of M.V.Sc. Thesis of the first author submitted to Bidhan Chandra Krishi Vishwavidyalaya, Mohanpur.
