Initial laboratory trials of an experimental subunit vaccine against Theileria parva based on the 67-kDa major sporozoite surface antigen revealed a range of responses to challenge. We have analyzed convergence in seven sets of monozygotic twins which suggests that genetic factors may have an i...
Ballingall, K.T.
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Luyai, A.
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Rowlands, G.J.
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Sales, J.
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Musoke, A.J.
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Morzaria, S.P.
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McKeever, Declan J.
,
[Bovine leukocyte antigen major histocompatibility complex class II DRB3*2703 and DRB3*1501 alleles are associated with variation in levels of protection against Theileria parva challenge following immunization with the sporozoite p67 antigen]
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Bovine leukocyte antigen major histocompatibility complex class II DRB3*2703 and DRB3*1501 alleles are associated with variation in levels of protection against Theileria parva challenge following immunization with the sporozoite p67 antigen
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.
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Leak, S.G.A.
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Peregrine, A.S.
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Nagda, S.M.
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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]
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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
East Coast fever (ECF), caused by Theileria parva, is the most important tick-borne disease of cattle in much of eastern, central and southern Africa. In Kenya, immunization against ECF has been performed in many field trials using the infection and treatment method. The main targets for immuniza...
Deem, S.L.
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Perry, Brian D.
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Katende, J.M.
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McDermott, John J.
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Mahan, S.M.
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Maloo, S.H.
,
Morzaria, S.P.
,
Musoke, A.J.
,
Rowlands, G.J.
,
[Variations in prevalence rates of tick-borne diseases in Zebu cattle by agroecological zone: Implications for East Coast fever immunization]
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Variations in prevalence rates of tick-borne diseases in Zebu cattle by agroecological zone: Implications for East Coast fever immunization
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.
,
Mulatu, W.
,
Authié, E.
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D'Ieteren, G.D.M.
,
Leak, S.G.A.
,
Nagda, S.M.
,
[Effects of trypanosomiasis on reproduction of East African Zebu cows exposed to drug-resistant trypanosomes]
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Effects of trypanosomiasis on reproduction of East African Zebu cows exposed to drug-resistant trypanosomes
Two experiments were carried out to identify the target population of cattle for immunisation against East Coast fever (ECF) using the infection-and-treatment method. Firstly, a sentinel-calf study was used to determine the age window for ECF immunisation by determining ages at clinical detection...
Maloo, S.H.
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Ngumi, P.
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Mbogo, S.
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Williamson, S.
,
Thorpe, W.R.
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Rowlands, G.J.
,
Perry, Brian D.
,
[Identification of a target population for immunisation against East Coast fever in coastal Kenya]
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Identification of a target population for immunisation against East Coast fever in coastal Kenya
In order to assess the effect of tsetse control on livestock productivity, 21 herds of cattle of N'Dama, Baoule and Zebu cross breeds in the region of Boundiali, northern Cote d'Ivoire, were monitored monthly for trypanosome prevalence, packed red cell volume (PCV), body weight and reproductive p...
Rowlands, G.J.
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D'Ieteren, G.D.M.
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Coulibaly, L.
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Hecker, P.A.
,
Leak, S.G.A.
,
Nagda, S.M.
,
[Assessment of the effect of tsetse control on livestock productivity - a case study in northern Cote d'Ivoire]
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Assessment of the effect of tsetse control on livestock productivity - a case study in northern Cote d'Ivoire
Tsetse populations and trypanosome prevalence in cattle were monitored from 1986 to 1993 in the Ghibe valley, south-west Ethiopia. From January 1991 to December 1993 between 2000 and 4000 cattle were treated at monthly intervals with a synthetic pyrethroid insecticide, cypermethrin (RS-alpha-cyan...
Leak, S.G.A.
,
Mulatu, W.
,
Rowlands, G.J.
,
D'Ieteren, G.D.M.
,
[A trial of a cypermethrin `pour-on' insecticide to control Glossina pallidipes, G. fuscipes fuscipes and G. morsitans submorsitans (Diptera: Glossinidae) in south-west Ethiopia]
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A trial of a cypermethrin `pour-on' insecticide to control Glossina pallidipes, G. fuscipes fuscipes and G. morsitans submorsitans (Diptera: Glossinidae) in south-west Ethiopia
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]
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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.
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Colardelle, C.
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Coulibaly, L.
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Dumont, P.
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Feron, A.
,
Hecker, P.
,
D'Ieteren, G.D.M.
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Jeannin, P.
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Minengu, M.
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Minja, S.
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Mulatu, W.
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Nankodaba, G.
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Ordner, G.
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Rowlands, G.J.
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Sauveroche, B.
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Tikubet, G.
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Trail, J.C.M.
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[Relationships between tsetse challenge and trypanosome prevalence in trypanotolerant and susceptible cattle]
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Relationships between tsetse challenge and trypanosome prevalence in trypanotolerant and susceptible cattle
This paper addresses issues surrounding measurment of the potential productivity gains from new livestock technologies and the returns to international livestock research. The approach, applicable to many livestock production constraints and technologies, uses geographic information systems (GIS)...
Kristjanson, Patricia M.
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Swallow, B.M.
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Rowlands, G.J.
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Kruska, R.L.
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Leeuw, P.N. de
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[Measuring the costs of African animal trypanosomosis, the potential benefits of control and returns to research]
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Measuring the costs of African animal trypanosomosis, the potential benefits of control and returns to research