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The control of animal trypanosomiasis consists, amongst other things, the punctual treatment of new cases, primarily diagnosed by pastoralists on the basis of clinical signs. This practice suggests that many healthy infected animals are left untreated. In this study, animal trypanosomiasis in cattle of good body condition score was evaluated, the existence of polyclonal anti-trypanosome (Anti-tryps) and its serotherapy implications were discussed. From January to March 2020, the study was carried out in the Mission Special d’Eradication des Glossines in Ngaoundere. A total of 298 blood samples were collected from cattle in randomly selected ranches in Ngaoundere. The blood samples were subjected to parasitological examination using the buffy coat method and the packed cell volume determined. A serum sample of cattle with trypanosome was subjected to serotherapeutical study against Trypanosoma congolense in mice and the parasitemia and mortality were analyzed. An overall trypanosomiasis prevalence of 4.02% was found in the cattle examined. Trypanosome-infected cattle had significantly (P = 0.0001) lower Packed Cell Volumes (PCV). Anemia was highly associated with trypanosome infection (OR = 10.54; p = 0.0005). Species of trypanosomes identified were Trypanosoma congolense and Trypanosoma vivax. Concentration of 5 μl/g body weight of antiserum showed significantly (P = 0.02) protective effect in cure and passive immunization of mice. In conclusion, carriers of trypanosomes are present amongst cattle of good body condition score. Attempts to successfully reduce the population of reservoir of trypanosomes within herds and control the disease will need to consider mass screening including both animals of good and poor body conditions and anti-sera of trypanosomes will be a good candidate for therapeutical and preventive control.

Animal Trypanosomiasis in Cattle of Good Body Condition Score in the Adamawa Region of Cameroon: Hematological and Immunological Implications