Kemboi D C, Chegeh H W, Bebora L C, Nyaga P N, Njagi L W, Maingi N, Mbuthia P G and Githinji J M 2014: Effect of parasite control on immune response to Newcastle Disease vaccination in village chicken, Mbeere sub county. Livestock Research for Rural Development. Volume 26, Article #34. Retrieved , from http://www.lrrd.org/lrrd26/2/kemb26034.htm