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Blood samples were collected from parasitaemic cattle in the Ghibe Valley, Ethiopia, frozen in liquid nitrogen and transported to Nairobi, Kenya. Twelve of the stabilates were inoculated into individual Boran (Bos indicus) calves and characterised for their sensitivity, in turn, to diminazene ace...


Codjia, V.Mulatu, W.Majiwa, P.A.O.Leak, S.G.A.Rowlands, G.J.Authié, E.D'Ieteren, G.D.M.Peregrine, A.S.[Epidemiology of bovine trypanosomiasis in the Ghibe valley, southwest Ethiopia. 3. Occurrence of population of Trypanosoma congolense resistant to diminazene, isometamidium and homidium]Epidemiology of bovine trypanosomiasis in the Ghibe valley, southwest Ethiopia. 3. Occurrence of population of Trypanosoma congolense resistant to diminazene, isometamidium and homidium

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

Tsetse fly populations have been monitored since January 1986 in two areas of the Ghibe valley in southwest Ethiopia, in order to assess trypanosomiasis risk to cattle. The two study areas are Abelti/Ghibe and Gullele/Tolley. Two species of tsetse fly were detected in the valley from 1986 to 1992...


Leak, S.G.A.Mulatu, W.[Advance of Glossina morsitans submorsitans and G. pallidipes along the Ghibe-river system in southwest Ethiopia]Advance of Glossina morsitans submorsitans and G. pallidipes along the Ghibe-river system in southwest Ethiopia

West African N'Dama cattle have developed a genetic capacity to survive, reproduce and remain productive under trypanosomosis risk. The cellular and molecular bases of this so-called trypanotolerance are not known, but the trait is manifested by the N'Dama's greater capacity to control parasitae...


Naessens, JanLeak, S.G.A.Kennedy, D.J.Kemp, Stephen J.Teale, A.J.[Responses of bovine chimaeras combining trypanosomosis resistant and susceptible genotypes to experimental infection with Trypanosoma congolense]Responses of bovine chimaeras combining trypanosomosis resistant and susceptible genotypes to experimental infection with Trypanosoma congolense

Approximately 390 East African Zebu calves from birth to 3 years of age and their dams 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. Cattle were individua...


Rowlands, G.J.Mulatu, W.Authié, E.D'Ieteren, G.D.M.Leak, S.G.A.Nagda, S.M.[Effects of trypanosomiasis on growth and mortality of young East African Zebu cattle exposed to drug-resistant trypanosomes]Effects of trypanosomiasis on growth and mortality of young East African Zebu cattle exposed to drug-resistant trypanosomes

In 1986 a project was set up to determine the constraints to production of Zebu cattle under trypanosomiasis risk in the Ghibe valley. Approximately 1800 East African Zebu cattle (EAZC) were resident within the Ghibe valleey during the experimental period (1986 - 1992) and were maintained under t...


Peregrine, A.S.Mulatu, W.Leak, S.G.A.Rowlands, G.J.[Epidemiology of bovine trypanosomiasis in the Ghibe Valley, Ethiopia: Multiple-drug resistance and its effective control]Epidemiology of bovine trypanosomiasis in the Ghibe Valley, Ethiopia: Multiple-drug resistance and its effective control

A tsetse control campaign was started in January 1991 using a synthetic pyrethroid cypermethrin `pour-on' applied monthly to cattle exposed to high levels of drug-resistant trypanosomes in the Ghibe valley of southwest Ethiopia. In December 1992, a cost-recovery scheme was introduced, and thereaf...


Rowlands, G.J.Mulatu, W.Leak, S.G.A.Nagda, S.M.D'Ieteren, G.D.M.[Estimating the effects of tsetse control on livestock productivity - a case study in southwest Ethiopia]Estimating the effects of tsetse control on livestock productivity - a case study in southwest Ethiopia

Trypanosomiasis remains the most important constraint to livestock production on the African continent. Chemotherapy, using curative and prophylactic drugs, is the main method of control of the disease in cattle. The exploitation of the trypanotolerance trait of some breeds of large and small rum...


Vreysen, M.J.B.Leak, S.G.A.[Tsetse control: Recent successes in Tanzania and Ethiopia]Tsetse control: Recent successes in Tanzania and Ethiopia
Rowlands, G.J.Swallow, B.M.Kristjanson, Patricia M.Leak, S.G.A.Mulatu, W.[Sustainability and economic benefits of tsetse control using an insecticide pour-on applied to cattle in Southwest Ethiopia]Sustainability and economic benefits of tsetse control using an insecticide pour-on applied to cattle in Southwest Ethiopia

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

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