Gachohi J M, Bett B and Murilla G A 2009: Factors influencing prevalence of trypanosomosis in Orma Boran (trypanotolerant) and Teso zebu (trypanosusceptible) cattle crosses in Teso District, western Kenya, Livestock Research for Rural Development. Volume 21, Article #216. Retrieved , from http://www.lrrd.org/lrrd21/12/gach21216.htm