The area-wide epidemiology of bovine trypanosomosis and its impact on mixed farming in subhumid West Africa; a case study in Togo

Hendrickx, Guy; Napala, A.; Dao, B.; Batawui, K.; Bastiaensen, P.; Deken, R. De; Vermeilen, A; Vercruysse, Jozef; Slingenbergh, Jan

doi:10.1016/s0304-4017(99)00086-2

Cited by 18 publications

(6 citation statements)

References 8 publications

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“…The high costs required to produce tsetse distribution maps through ground-based vector surveys have resulted in few studies looking at the spatial dimension of disease prevalence [6]. However, the use Geographical Information System (GIS) software now makes it cheaper and easier to produce maps which can serve as useful tools for policy discussion, and allow for analysis of factors that would influence the disease patterns [7].…”

Section: Resultsmentioning

confidence: 99%

Spatial distribution of African Animal Trypanosomiasis in Suba and Teso districts in Western Kenya

et al. 2010

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BackgroundStudies on the epidemiology of African Animal Trypanosomiasis (AAT) rarely consider the spatial dimension of disease prevalence. This problem is confounded by use of parasitological diagnostic methods of low sensitivity in field surveys. Here we report a study combining highly sensitive and species specific molecular diagnostic methods, and Geographical information system (GIS) for spatial analysis of trypanosome infection patterns, to better understand its epidemiology. Blood samples from 44 and 59 animals randomly selected from Teso and Suba districts respectively were screened for trypanosomes using PCR diagnostic assays. Spatial distribution of the positive cases was mapped and average nearest neighbour analysis used to determine the spatial pattern of trypanosome cases detected.FindingsTrypanosome prevalence of 41% and 29% in Suba and Teso districts respectively was observed. T. vivax infections were most prevalent in both areas. Higher proportions of T. brucei infections (12%) were observed in Suba, a known sleeping sickness foci compared with 2% in Teso. Average nearest neighbour analysis showed the pattern of trypanosome infections as random. An overlay with tsetse maps showed cases lying outside the tsetse infested areas, mostly being cases of T. vivax which is known to be transmitted both biologically by tsetse and mechanically by biting flies.ConclusionThese findings suggest a need to design control strategies that target not just the biological vector tsetse, but also the parasite in cattle in order to clear the possibly mechanically transmitted T. vivax infections. There is need to also review the accuracy of available tsetse maps.

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Section: Resultsmentioning

confidence: 99%

Spatial distribution of African Animal Trypanosomiasis in Suba and Teso districts in Western Kenya

et al. 2010

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“…[ 16 ] have investigated low resolution data in relation to tsetse habitat suitability, and Hendrickx et al . [ 30 ] investigated animal trypanosomiasis occurrence in relation to agricultural and herd-related macro-scale variables in Togo. In Uganda, Odiit et al .…”

Section: Discussionmentioning

confidence: 99%

Analysis of risk factors for T. brucei rhodesiensesleeping sickness within villages in south-east Uganda

et al. 2008

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Background: Sleeping sickness (HAT) caused by T.b. rhodesiense is a major veterinary and human public health problem in Uganda. Previous studies have investigated spatial risk factors for T.b. rhodesiense at large geographic scales, but none have properly investigated such risk factors at small scales, i.e. within affected villages. In the present work, we use a case-control methodology to analyse both behavioural and spatial risk factors for HAT in an endemic area.

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“…In Burkina Faso, the Region of the Boucle du Mouhoun was selected as one of the initial locations for the implementation of the PATTEC initiative. Indeed, this region is located at the Northern limit of the tsetse distribution (Laveissière,1976;Hendrickx et al, 1999) and the subsequent elimination campaign will be carried out following the "rolling carpet" strategy from North to South. Preventing reinvasion of flies living in the adjacent river basins i.e.…”

Section: Introductionmentioning

confidence: 99%

Baseline survey of animal trypanosomosis in the region of the Boucle du Mouhoun, Burkina Faso

Sow

Ganaba

Percoma

et al. 2013

Research in Veterinary Science

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In view of gathering baseline information about the prevalence of animal trypanosomosis, the Pan African Tsetse and Trypanosomiasis Eradication Campaign (PATTEC) funded a cross sectional survey in the Region of the Boucle du Mouhoun which constitutes the Northern limit of the tsetse distribution in Burkina. This cross sectional study was carried out in 53 villages located in the 6 provinces of the region. A total of 2002 cattle, 1466 small ruminants and 481 donkeys were sampled. This survey showed that about 25% of the cattle had been treated with trypanocidal drugs within 3 months before the survey compared to 3% and 0.42% for the small ruminants and donkeys respectively. Parasitological prevalence in cattle was low: 0.77% (95% C.I. 0.30-1.95%). No goats and three donkeys were found infected with trypanosomes. Infections were mainly due to Trypanosoma vivax (75.0%) with cases of T. congolense (25.0%). In cattle, the serological prevalence of trypanosomosis, for the entire Region of the Boucle du Mouhoun, was 34.2% (95%C.I. 26.1-43.4%). For sheep, goats and donkeys, the prevalence were of 20.9% (95%C.I. 12.2-33.5%), 8.5% (95%C.I. 5.7-12.5%) and 5.8% (95%C.I. 3.9-8.6%) respectively.The age and distance to the river were the two main risk factors associated with seropositivity.

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The area-wide epidemiology of bovine trypanosomosis and its impact on mixed farming in subhumid West Africa; a case study in Togo

Cited by 18 publications

References 8 publications

Spatial distribution of African Animal Trypanosomiasis in Suba and Teso districts in Western Kenya

Spatial distribution of African Animal Trypanosomiasis in Suba and Teso districts in Western Kenya

Analysis of risk factors for T. brucei rhodesiensesleeping sickness within villages in south-east Uganda

Baseline survey of animal trypanosomosis in the region of the Boucle du Mouhoun, Burkina Faso

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