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An average of 840 East African Zebu cattle from nine herds in the Ghibe Valley, southwest Ethiopia were monitored from 1986 to 1990. Each month blood samples were collected from analysis of packed red cell volume and detection of trypanosomes. Animals were found to be parasitaemic and with a PCV ...


Rowlands, G.J.Mulatu, W.Authie, A.D'Ieteren, G.D.M.Leak, S.G.A.Nagda, S.M.Peregrine, A.S.[Epidemiology of bovine trypanosomiasis in the Ghibe Valley, southwest Ethiopia. 2. Factors associated with variations in trypanosome prevalence, incidence of new infections and prevalence of recurrent infections]Epidemiology of bovine trypanosomiasis in the Ghibe Valley, southwest Ethiopia. 2. Factors associated with variations in trypanosome prevalence, incidence of new infections and prevalence of recurrent infections

Approximately 320 East African Zebu cows over 36 months of age were monitored monthly from 1986 to 1992 in nine village herds in an area of high trypanosomiasis risk in southwest Ethiopia where there was resistance to all available trypanocidal drugs. Cows were individually treated with diminazen...


Rowlands, G.J.Woudyalew MulatuNagda, S.M.D'Ieteren, G.D.M.[Variations in packed red cell volume and trypanosome prevalence and relationships with reproductive traits in East African Zebu cows exposed to drug-resistant trypanosomes]Variations in packed red cell volume and trypanosome prevalence and relationships with reproductive traits in East African Zebu cows exposed to drug-resistant trypanosomes

A method is described for calculating new infection incidence from monthly field data collected between April 1994 and February 1998 from an average of 770 Ethiopian Highland Zebu cattle maintained under traditional management in the Ghibe valley, southwest Ethiopia and exposed to a high challeng...


Rowlands, G.J.Leak, S.G.A.Peregrine, A.S.Nagda, S.M.Mulatu, W.D'Ieteren, G.D.M.[The incidence of new and the prevalence and persistence of recurrent trypanosome infections in cattle in southewest Ethiopia exposed to a high challenge with drug-resistant parasites]The incidence of new and the prevalence and persistence of recurrent trypanosome infections in cattle in southewest Ethiopia exposed to a high challenge with drug-resistant parasites

Trypansosome infections in approximately 110,000 tsetse of 12 species or subspecies, at sites in six African countries, were studied over various periods from 1983 to 1994. Infection rates ranged from 0.2 percent in Glossina fuscipes quanzensis Pires at a site in Zaire, to 18 percent in Glossina ...


Leak, S.G.A.Rowlands, G.J.[The dynamics of trypanosome infections in natural populations of tsetse (Diptera: Glossinidae) studied using wing-fray and ovarian ageing techniques]The dynamics of trypanosome infections in natural populations of tsetse (Diptera: Glossinidae) studied using wing-fray and ovarian ageing techniques

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

Drug resistance in trypanosomes is increasingly being recognised as a constraint to livestock production in many parts of Africa. However the long-term stability of such resistance is unclear and has therefore been investigated over a 4-year period at a site in Ethiopia. The result shows that the...


Peregrine, A.S.Majiwa, P.A.O.Rowlands, G.J.[Long-term occurrence of multiple drug resistance in Trypanosoma congolense at Ghibe, Ethiopia]Long-term occurrence of multiple drug resistance in Trypanosoma congolense at Ghibe, Ethiopia

Presents preliminary results of a study of N'Dama cattle introduced in a metayage system in Zaire. Studies tsetse relative densities, tsetse challenge, corrected tsetse challenge, trypanosome prevalence and PCV in gallery forest, savanna woodland and grass savanna areas. Also presents data on fee...


Winckel, F. vanD'Ieteren, G.D.M.Leak, S.G.A.Maehl, J.H.H.Minengu, M.Nagda, S.M.Ngamuna, S.Rarieya, J.M.Rowlands, G.J.Thorpe, W.R.Trail, J.C.M.[Preliminary results of a study of N'Dama cattle introduced in a metayage system in Idiofa District, Zaire]Preliminary results of a study of N'Dama cattle introduced in a metayage system in Idiofa District, Zaire

Determines factors affecting trypanosome prevalence in Zebu cattle exposed to high trypanosomiasis risk in south west Ethiopia. Studies the occurrence of trypanosome infection in adult cattle, monthly trypanosome prevalence in calves and cattle, prevalence in male and female adult cattle, relatio...


Mulatu, W.D'Ieteren, G.D.M.Duffera, W.Tegene, G.Leak, S.G.A.Maehl, J.H.H.Nagda, S.M.Rarieya, J.M.Rowlands, G.J.Thorpe, W.R.Tikubet, G.Trail, J.C.M.[Factors affecting trypanosome prevalence in Zebu cattle exposed to high trypanosomiasis risk in south-west Ethiopia]Factors affecting trypanosome prevalence in Zebu cattle exposed to high trypanosomiasis risk in south-west Ethiopia

In this study, widespread resistance of T. congolense infections in East Highland Zebu cattle at Ghibe, southwest Ethiopia, to all available trypanocidal drugs has been demonstrated. Changes in incidence of T. congolense infections in cattle 36 months and more of age sampled between 1994 and 1997...


Rowlands, G.J.[Detecting resistance of trypanosomal infection to diminazene aceturate - a possible field test?]Detecting resistance of trypanosomal infection to diminazene aceturate - a possible field test?

Tsetse control is often applied to an area which covers several herds. To carry out a trial using an uncontrolled area would be difficult because of the virtual impossibility of findings two areas identical in every respect. One solution (method 1) is to compare animal productivity before and aft...


Rowlands, G.J.[Assessing impacts of animal health interventions on productivity]Assessing impacts of animal health interventions on productivity

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