The use of chemoprophylaxis in East African Zebu village cattle exposed to trypanosomiasis in Muhaka, Kenya

A study conducted to assess the efficacy of chemoprophylaxis for the improvement of the health and productivity of East African Zebu village cattle exposed to trypanosomiasis. Examines the cost-effectiveness of the treatment. Includes data on calf pre-weaning health and weight traits, weight traits of calves from 12-18 months of age, calf post-weaning health and weight traits, and breeding cow health and production traits - for the non-prophylactic and prophylactic groups

Evaluation of criteria of trypanotolerance

Evaluates teh criteria for trypanotolerance including three related characterstics, v.z. the ability to control parasitaemia, the ability to control anaemia, and the ability to develop an effective immune response

Assessing impacts of tsetse control in northern Cote d'Ivoire on animal productivity

Herd-to-herd variations in the primary biological impact of an intervention can sometimes be utilised to investigate secondary impacts. This approach has been used in the analysis of the effects of tsetse control on calf live weight gain. Nineteen herds of cattle were monitored in the region of Boundiali in northern Cote d'Ivoire from January 1987 to December 1989. From January 1988 to December 1989 insecticide-impregnated biconical traps were used to control tsetse flies in the area. Annual tsets density was reduced by over 95 percent and average monthly trypanosome prevalence in cattle by over 80 percent. Increases in growth rate were plotted against decreases in trypanosome prevalence from 1987 to 1988 and 1989 for each of the 129 herds and regression analysis undertaken with Trypanosoma congolense and T. vivax as independent variables. This analysis showed an increase in growth rate of 3.9 + 1.4 g/d perpercentage unit decrease in overall trypanosome prevalence. When the two species were considered separately this significant increase appeared to be primarily associated with reductions in T. vivax prevalence

Effect of tsetse control with insecticide-impregnated traps on trypanosome prevalence and productivity of cattle and sheep in northern Cote d'Ivoire

Nineteen herds of cattle (N'Dama, Baoule and Zebu crosses) and 20 flocks of Djallonke and Djallonke x Sahel sheep in the region of Boundiali, northern Cote d'Ivoire, were monitored monthly for body weight, packed red blood cell volume and the presence of trypanosomes in blood over various periods from January 1984 to December 1992. A tsetse-control campaign using alpha-cypermethrin insecticide-impregnated traps was introduced in January 1988. Tsetse control reduced tsetse relative density by over 95 percent. This resulted in a corresponding reduction in prevalence of T. congolense of over 90 percent in both sheep and cattle over the period 1988 to 1992. Average reductions in prevalence of T. vivax were lower, on average 65 percent in adults and 83 percent in young animals. T. vivax was the predominant species affecting calves, and the reduction in prevalence of this species due to tsetse control was significantly associated with increases in growth rate

Efficacy of chemoprophylaxis for East African Zebu cattle exposed to trypanosomiasis in village herds in Kenya

Studies the efficacy of chemoprophylaxis for the control of trypanosomiasis on 700 heads of East African Zebu Cattle maintained in village herds in a tsetse-infested area at Muhaka, Coast province of Kenya. Shows the effect of trypanocidal drugs and time on trypanosome prevalence, and the effect of trypanocidal drugs and parasitaemia on blood packed cell volume (PCV) and on daily liveweight chang

Trypanosomiasis in N'Dama cattle in Zaire and its effects on their health and production

Reports the prevalence, species and intensity of trypanosome infections over a 3 year period for N'Dama cattle managed on Mushie Ranch, Zaire. Presents the effects of the trypanosome infections on blood packed cell volume reproductive performance and liveweights

Can PCV be used as an indicator of trypanosomiasis and production level in cattle?

Results of a study conducted to estimate the importance of factors influencing blood packed cell volume (PCV) and to investigate possible relationships between PCV and reproductive & liveweight performance of N'Dama cattle exposed and not exposed to trypanosomiasis under the same system of management on two ranches in Zair

Trypanosomiasis in N'Dama cattle under village management in Zaire

The prevalence, species and intensity of trypanosome parasitaemia over an eighteen-month period, February 1986 to July 1987, are reported for some 700 N`Dama cattle managed in twenty-five village herds in forest and plateau areas of Idiofa, Zaire. The effect of trypanosomiasis and other diseases on PCV was reported. Mean monthly PCV for the total population was 34.9%, with some variation between areas (forest 34.2%, plateau 35.6%) and large variation between herds (31.6 to 40.7). Mean past-partum weight of N`Dama cows in this population was 232 kg, and mean calf weights at 8 and 12 months were 88 and 105kh, respectively. These preliminary results on the health and performance of N`Dama cattle managed in village herds at trypanosomiasis risk were a good illustration of the trypanotolerance of the N`Dama