Field trial of a synthetic tsetse-repellent technology developed for the control of bovine trypanosomosis in Kenya (original) (raw)
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PLOS ONE, 2021
Trypanosomiasis is a significant productivity-limiting livestock disease in sub-Saharan Africa, contributing to poverty and food insecurity. In this paper, we estimate the potential economic gains from adopting Waterbuck Repellent Blend (WRB). The WRB is a new technology that pushes trypanosomiasis-transmitting tsetse fly away from animals, improving animals’ health and increasing meat and milk productivity. We estimate the benefits of WRB on the production of meat and milk using the economic surplus approach. We obtained data from an expert elicitation survey, secondary and experimental sources. Our findings show that the adoption of WRB in 5 to 50% of the animal population would generate an economic surplus of US$ 78–869 million per annum for African 18 countries. The estimated benefit-cost ratio (9:1) further justifies an investment in WRB. The technology’s potential benefits are likely to be underestimated since our estimates did not include the indirect benefits of the technolo...
Best-bet integrated strategies for containing drug-resistant trypanosomes in cattle
Parasites & Vectors, 2012
Background African animal trypanosomosis is a major constraint to the rearing of productive livestock in the sub-humid Sudan-Sahel zone of West Africa where cotton is grown. Trypanosomosis is mainly controlled using trypanocidal drugs, but the effective use of drugs is threatened by the development of widespread resistance. This study tested integrated best-bet strategies for containment and/ or reversal of trypanocide resistance in villages in south-east Mali where resistance has been reported. Methods Four sentinel villages each from an intervention area (along the road from Mali to Burkina Faso) and a control area (along the road from Mali to Côte d’Ivoire) were selected for the study. Tsetse control was based on deltamethrin-treated stationary attractive devices and targeted cattle spraying between March 2008 and November 2009. Trypanosome-positive cattle were selectively treated with 3.5 mg/kg diminazene aceturate. Strategic helminth control using 10 mg/kg albendazole was also ...
Background The tsetse-transmitted African trypanosomiases affect humans and animals. Trypanosoma. brucei rhodesiense sleeping sickness, or human African trypanosomiasis is a zoonosis, for which cattle are the main reservoir of infection in south-eastern Uganda. Transmission of human and animal infective trypanosomes can be reduced by the application of deltamethrin insecticide to the belly and legs of cattle, thus reducing tsetse fly populations. Alongside an epidemiological study in southeastern Uganda, a farm level assessment was done to calculate the average and incremental benefit-cost ratios of spraying different proportions of the village cattle population using this restricted application protocol.Method A study comprising 2,400 semi-structured interviews was undertaken over a period of 18 months. Financial data on household income and expenditure on cattle provided the basis for the marginal analyses. The benefit of RAP to farmers was assessed using gross margin analysis whe...
Revue d'élevage et de médecine vétérinaire des pays tropicaux, 1998
A joint tsetse and trypanosomosis control program has been carried out along the Uganda-Kenya border since July 1991. A combination of tsetse trapping, pour-on and chemotherapy has been used. Different combinations of control strategies were tried in the project area divided into three zones (A, B and C). In zone A, large-scale applications of pour-on, tsetse trapping (8-10 traps/km2) and chemotherapy were used. In zone B, only tsetse trapping (8-10 traps/km2) and chemotherapy were used. In zone C, block treatment of cattle in the entire area with diminazene aceturate was carried out followed by less intensive tsetse trapping (4-5 traps/km2). During monitoring, 400 cattle in each zone were screened every three months and the tsetse apparent density determined every month. From July 1991 to March 1997 reductions in the prevalence of trypanosomosis and apparent tsetse density of 94 and 99.5% in zone A, 89 and 99.5% in zone B and 79 and 95% in zone C, respectively, were achieved and ma...