
Poster prepared by Zelalem Gutu Terfa, S. Garikipati, Girma Tesfahun Kassie, J.M. Bettridge, Tadelle Dessie, P. Wigley and R.M. Christley for the Annual Meeting of the Society of Veterinary Epidemiology and Preventive Medicine, Madrid, Spain, 20-22 March 2013.