Browsing by Author "Bekele Harito, Jemere"

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    Control of Tsetse and Trypanosomosis in the Southern Rift Valley (Step Area): Evaluation of Deltalmethrin Application
    (AAU, 2004-06) Bekele Harito, Jemere; Abebc, Getachew (Prf)
    A trial aimed to evaluate the efficacy of Deltamcthrin (0.4% impregnated odour-baited targets and I % pour-on formulation app lied to animals) in reducing the incidence of bovine trypanosornosis and comparing the corresponding cost-effectiveness of both strategies was conducted in two selected IOXIOkm Universal Transverse Mercator Grids of the Southern Tsetse Eradication Project (STEP) area in the Southern Rifl Valley of Ethiopia. The Grids selected were I-B & G5 designated as study Sites I & Il respectively. The tTial was underway from late September, 2003 to early April, 2004. The accomplishment of the trial included baseline survey (Questionnaire, Parasitology, and entomology), intervention with insecticide (Dcltamethrin 0.4%) impregnated odour-baited targets at Site I(Grid H3) and Deltamethrin I % 'pour-on' application to cattle at Site II (Grid G5) and monthly monitoring of the incidence 0 f disease a nd apparent density of tsetse fly. Following the deployment 0 f 460 targets (0.4% Deltamethrin impregnated and odour-baited) at a density of 4 targets fkm2 at the trial Site I, the relative abundance of tsetse fly (G. pal/idipes) population declined from a pre-intervention catch of 1.35 flies/trap/day to 0.05 flie s/trap/day during t he final trapping time in April, 2004 with about 88.88% overall reduction achieved. The associated disease (uypanosomosis) status was monitored by monthly blood sampling from the sentinel animals established prior to the intervention and the incidence in cattle dropped from 10.75% (first monitoring) to 1.8% (last monitoring) with about 83.25%. The prevalence of the disease had also dropped to 9% (P< 0.01) as compared to the pre-intervention result of 23% and as a result, an overall reduction of 60% was achieved. The corresponding overall mean pev (packed cell volume) record had sho\\'T1 an improvement from 21.8% of the pre-intervention to 25.5 % (P