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A study undertaken to evaluate the degree of genetic determination in the control of development of anaemia in N'Dama post-weaner cattle exposed to a medium natural trypanosome challenge during a short term test for trypanotolerance. The heritabilities of average pcv, lowest pcv reached, and grow...


Trail, J.C.M.D'Ieteren, G.D.M.Maille, J.C.Yangari, G.[Genetic aspects of control of anaemia development in trypanotolerant N'Dama cattle]Genetic aspects of control of anaemia development in trypanotolerant N'Dama cattle

Evaluates components of a short term test for trypanotolerance criteria in N'Dama post-weaners exposed to a medium natural trypanosome challenge in Gabon; compares the effectiveness of different measures of control of development of anaemia; and measures the post-test recovery of packed red cell ...


Trail, J.C.M.D'Ieteren, G.D.M.Colardelle, C.Maille, J.C.Ordner, G.Sauveroche, B.Yangari, G.[Evaluation of a field test for trypanotolerance in young N'Dama cattle]Evaluation of a field test for trypanotolerance in young N'Dama cattle

Presents results of a study undertaken firstly to measure the relative effects in N'Dama cattle of length of time detected parasitaemic; intensity of parasitaemia; and control of development of anaemia; on reproductive performance (calving interval), maternal ability (calf weaning weight) and cow...


Trail, J.C.M.D'Ieteren, G.D.M.Feron, A.Kakiese, O.Mulungo, M.Pelo, M.[Effect of trypanosome infection, control of parasitaemia and control of anaemia development on productivity of N'Dama cattle]Effect of trypanosome infection, control of parasitaemia and control of anaemia development on productivity of N'Dama cattle

Trypanosome infection was detected by the dark ground/phase contrast buffy coat microscopic technique in N'Dama cattle in a high natural tsetse challenge situation in Zaire. The data were used to compare the pattern of infection in very young animals and in their dams, and to evaluate how the pat...


Trail, J.C.M.Wissocq, N.M.D'Ieteren, G.D.M.Kakiese, O.Murray, M.[Patterns of Trypanosoma vivax and T. Congolense infection differ in young N'Dama cattle and their dams]Patterns of Trypanosoma vivax and T. Congolense infection differ in young N'Dama cattle and their dams

Reports results of a study on the relationships between tsetse challenge and trypanosome prevalence in trypanotolerant and susceptible breeds of cattle. Presents data on tsetse challenge and trypanosome prevalence in N'Dama and Zebu cattle in Zaire, Gabon, Ethiopia and Cote d'Ivoire.


Leak, S.G.A.Colardelle, C.Coulibaly, L.Dumont, P.Feron, A.Hecker, P.D'Ieteren, G.D.M.Jeannin, P.Minengu, M.Minja, S.Mulatu, W.Nankodaba, G.Ordner, G.Rowlands, G.J.Sauveroche, B.Tikubet, G.Trail, J.C.M.[Relationships between tsetse challenge and trypanosome prevalence in trypanotolerant and susceptible cattle]Relationships between tsetse challenge and trypanosome prevalence in trypanotolerant and susceptible cattle

Presents results of analysis of the reproductive performance, viability and growth performance traits of Djallonke sheep & N'dama cattle kept at the Centre de Recherches Zootechniques in Senegal; includes productivity indices for the two species built on the basis of the analyzed data.


Fall, AbdouDiop, MouhamadouSandford, J.Wissocq, Y.J.Durkin, J.W.Trail, J.C.M.[Evaluation of the productivities of Djallonke sheep and N'Dama cattle at the Centre de Recherches Zootechniques, Kolda, Senegal]Evaluation of the productivities of Djallonke sheep and N'Dama cattle at the Centre de Recherches Zootechniques, Kolda, Senegal

Presents results of experiments to determine phenotypic & genotypic relationships of the abilities to control parasitaemia, resist anaemia or develop an immune response with animal performance in terms of daily weight gain, maintenance of packed cell volume levels and disease prevalence in trypan...


Trail, J.C.M.Feron, A.Pelo, M.Colardelle, C.Ordner, G.D'Ieteren, G.D.M.Durkin, J.W.Maehl, H.M.Thorpe, W.R.[Selection in trypanotolerant cattle breeds in Africa]Selection in trypanotolerant cattle breeds in Africa
Autor: Trail, J.C.M.

Presents the current status of animal breeding in Africa and indicates the potential for Development and implementation of breeding programs. Discusses ecological zones, breeding possibilities and productivity of cattle breeds.


Trail, J.C.M.[The potential for animal breeding in Africa]The potential for animal breeding in Africa

Host ability to control the Development of trypanosomes is a major component of trypanotolerance. However, practical indicators of the parasite control capability have still to be identified as they rely on the availability of more precise diagnostic techniques that could be carried out at the fa...


Wissocq, N.M.D'Ieteren, G.D.M.Trail, J.C.M.Masake, R.Nantulya, V.M.Monsengo, B.[Trypanosome antigen test to characterise infection status in N'Dama cattle]Trypanosome antigen test to characterise infection status in N'Dama cattle
Autor: Trail, J.C.M.

Discusses the characteristics of trypanotolerant West African Shorthorn and N'dama cattle, examining their productivity, mechanisms of trypanotolerance and environmental factors affecting trypanotolerance, esp. level of tsetse challenge and previous exposure.


Trail, J.C.M.[Trypanotolerant N'Dama and West African Shorthorn cattle]Trypanotolerant N'Dama and West African Shorthorn cattle

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