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.
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Mulatu, W.
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Authie, A.
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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]
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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
Discusses factors influencing liveweight in a range of trypanotolerance network situations. Analyses liveweight traits, viz, dam liveweights at parturition and weaning, dam liveweight change between parturition and weaning, progeny liveweights at birth and weaning and progeny pre-weaning daily gain.
Maehl, J.H.H.
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Coulibaly, L.
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Defly, A.
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D'Ieteren, G.D.M.
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Feron, A.
,
Grundler, G.
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Hecker, P.
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Itty, P.
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Mawuena, K.
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Morkramer, G.
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Mulungo, M.
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Nagda, S.M.
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Paling, R.W.
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Pelo, M.
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Rarieya, J.M.
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Schuetterle, A.
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Sheria, M.
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Thorpe, W.R.
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Trail, J.C.M.
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[Factors influencing liveweight in a range of network situations]
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Factors influencing liveweight in a range of network situations
Studies the health and performance of two strains trypanotolerant N'Dama cattle, susceptible Nguni cattle and their crosses over a three-year period, 1983-1985, at OGAPROV ranch in Gabon; presents the influences of breed and animal age on the prevolence, species and intensity of trypanosome paras...
Ordner, G.
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Colardelle, C.
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D'Ieteren, G.D.M.
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Dumont, P.
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Itty, P.
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Jeannin, P.
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Leak, S.G.A.
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Maehl, J.H.H.
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Nagda, S.M.
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Paling, R.W.
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Rarieya, J.M.
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Thorpe, W.R.
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Trail, J.C.M.
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Yangari, G.
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[Health and productivity of trypanotolerant and susceptible cattle exposed to trypanosomiasis in Gabon and the impact of strategic chemoprophylaxis]
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Health and productivity of trypanotolerant and susceptible cattle exposed to trypanosomiasis in Gabon and the impact of strategic chemoprophylaxis
Discusses the productivity of N;Dama cattle at Kolo and Mushie ranches (Zaire). Includes data on productivity under zero (Kolo) and high (Mushie) trypanosomiasis risk (1984-86). Compares the productivity of Boran and N'Dama cattle under ranch management at five sites in Africa.
The prevalence, species and intensity of trypanosome parasitaemia in different livestock species, breeds, age groups and management systems are reported from Togo for trypanosotolerant sheep and goats in the Sokode area. The effects of these trypanosome parasitaemias on health and production trai...
Defly, A.
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Awuome, K.
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Bokovi, K.
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D'Ieteren, G.D.M.
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Grundler, G.
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Handlos, Michael
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Itty, P.
,
Leak, S.G.A.
,
Maehl, J.H.H.
,
Mawuena, K.
,
Morkramer, G.
,
Nagda, S.M.
,
Paling, R.W.
,
Rarieya, J.M.
,
Thorpe, W.R.
,
Trail, J.C.M.
,
[Effect of trypanosome infection on livestock health and production in Togo]
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Effect of trypanosome infection on livestock health and production in Togo
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.
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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]
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Effects of trypanosomiasis on growth and mortality of young East African Zebu cattle exposed to drug-resistant trypanosomes
The objective of this study was to apply transition models to distinguish between factors associated with both incident and persistent trypanosome infections. Data collected from 1561 cattle were analyzed from a long-term study involving 8 herds in which both trypanosome infections (a total of 56...
Schukken, Y.H.
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Schaik, G. van
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McDermott, John J.
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Rowlands, G.J.
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Nagda, S.M.
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Mulatu, W.
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D'Ieteren, G.D.M.
,
[Transition models to assess risk factors for new and persistent trypanosome infections in cattle - analysis of longitudinal data from the Ghibe Valley, Southwest Ethiopia]
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Transition models to assess risk factors for new and persistent trypanosome infections in cattle - analysis of longitudinal data from the Ghibe Valley, Southwest Ethiopia
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]
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Estimating the effects of tsetse control on livestock productivity - a case study in southwest Ethiopia
This study illustrates how productivity impacts resulting from livestock research can be measured using a herd simulation model, how the results of this model can be extended spatially using geographic information systems (GIS) to determine the potential increase in livestock production that woul...
Kristjanson, Patricia M.
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Rowlands, G.J.
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Swallow, B.M.
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Kruska, R.L.
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Leeuw, P.N. de
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Nagda, S.M.
,
[Using the economic surplus model to measure potential returns to international livestock research. The case of trypanosomosis vaccine research]
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Using the economic surplus model to measure potential returns to international livestock research. The case of trypanosomosis vaccine research
N’Dama cow and calf viabilities, parturition intervals, cow parturition and weaning weights and calf weaning weights were recorded during a three year period, January 1984 to December 1986. The management system was the same at Mushie and Kolo ranches (Zaire) where trypanosomiasis risk was high a...