[1] Makerere Univ, Coll Vet Med Anim Resources & Biosecur, POB 7062, Kampala, Uganda
[2] Natl Agr Res Org, Rwebitaba Zonal Agr Res & Dev Inst, Dept Livestock Hlth Res, POB 295, Entebbe, Uganda
[3] Gulu Univ, Fac Med, Dept Pathol, POB 166, Gulu, Uganda
[4] Univ Leipzig, Inst Anim Hyg & Vet Publ Hlth, D-04103 Leipzig, Germany
[5] Univ Med Ctr Goettingen, Dept Gastroenterol & Gastrointestinal Oncol, D-37075 Gottingen, Germany
[6] Ibn Sina Specialised Hosp, Mohammed Najeeb St, Khartoum 11560, Sudan
[7] Al Neelain Univ, Fac Med, 52nd St, Khartoum 11112, Sudan
[8] Univ Khartoum, Inst Studies & Promot Anim Exports, Unit Anim Hlth & Safety Anim Prod, Shambat 13314, Khartoum North, Sudan