1Division of Veterinary Biotechnology, Indian Veterinary Research Institute, Izatnagar- 243 122 (U.P.).
2Division of Veterinary Public Health, IVRI, Izatnagar.
3Division of Bacteriology and Mycology, IVRI, Izatnagar.
*Corresponding Author: (E-mail: pallab@ivri.up.nic.in)