Epidemiology of bovine trypanosomiasis in the Ghibe valley, southwest Ethiopia 1. Tsetse challenge and its relationship to trypanosome prevalence in cattle

Leak, S.G.A.; Mulatu, W.; Authié, Édith; D'Ieteren, G.D.M.; Peregrine, Andrew S.; Rowlands, G.J.; Trail, J.C.M.

doi:10.1016/0001-706x(93)90024-6

Cited by 51 publications

(30 citation statements)

References 6 publications

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“…This high proportion of T. vivax infections is in accordance with observations made in other tsetse-free areas of Ethiopia (Roeder et al 1984;Abebe & Jobre 1996) and elsewhere (Jones & Davila 2001). The high proportion of T. vivax infections in the tsetse-infested area contrasts sharply with trypanosome species prevalence data from other tsetse-infested regions of Ethiopia where T. congolense is the most prevalent trypanosome species in cattle (Leak et al 1993;Abebe & Jobre 1996). The high proportion of T. vivax infections in cattle sampled in our tsetse-infested areas is attributed to the location of the study sites which are situated on the edge of the tsetse-belt.…”

Section: Discussionsupporting

confidence: 86%

Seasonal prevalence of bovine trypanosomosis in a tsetse-infested zone and a tsetse-free zone of the Amhara Region, north-west Ethiopia

Cherenet¹,

Sani²,

Panandam³

et al. 2004

Onderstepoort J Vet Res

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During a period of four consecutive years, trypanosomosis surveys were conducted in a tsetse-infested and tsetse-free area of the Amhara Region of north-west Ethiopia. In each study area randomly selected communal cattle were sampled and their blood was investigated using parasitological diagnostic methods. At the same time the population of biting flies was sampled. The monthly average prevalence of trypanosome infections in cattle did not differ significantly between study areas. In both study areas, the prevalence of trypanosome infections was highest during the long rainy season. Trypanosome infections were mainly due to Trypanosoma vivax and they significantly reduced the average packed cell volume and the body condition of the animals. The monthly prevalence of infection was correlated with the density of biting flies, such as Tabanidae and Stomoxys spp., in the preceding month suggesting an important role of mechanical transmission in the epidemiology of trypanosomosis in both areas.

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Section: Discussionsupporting

confidence: 86%

Seasonal prevalence of bovine trypanosomosis in a tsetse-infested zone and a tsetse-free zone of the Amhara Region, north-west Ethiopia

Cherenet¹,

Sani²,

Panandam³

et al. 2004

Onderstepoort J Vet Res

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“…The high prevalence of the disease especially at Genika and Oujimta PAs could be due to the presence of suitable habitat for the vectors which results in high fly density. Form the study of Leak et al (1993), it is known that variation in tsetse density appeared to be the main factor for variation in the prevalence of trypanosomosis. The low prevalence of the disease especially at Goma takel, Aware, and Gizmeret could be due to indoor feeding (zero grazing) of cattle and the high use of trypanocidal drugs, respectively.…”

Section: Discussionmentioning

confidence: 99%

Bovine trypanosomosis and its vectors in two districts of Bench Maji zone, South Western Ethiopia

Tadesse

Tsegaye

2010

Trop Anim Health Prod

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A cross-sectional study was carried out from November 2008 to February 2009 in Guraferda and Sheko districts of Bench Maji Zone, South Western Ethiopia. The objective of the study was to determine the prevalence of bovine trypanosomosis and the density of its vectors. An overall prevalence of trypanosome infection in the study area was 4.4%. Trypanosoma congolense (36.36%) was the dominant trypanosome species followed by Trypanosoma vivax (18.18%) and Trypanosoma brucei (9.09%). Mean packed cell volume value of parasitemic animals (21.8%) was significantly (P<0.05) lower than that of aparasitemic animals (27.7%). Biconical and NGU traps were deployed for 72 h, and the result indicated Glossina pallidipes followed by Glossina fuscipes as the only tsetse fly species caught in the study area along with other biting flies like Stomoxys and Tabanus. The apparent density of tsetse flies was 2.83 flies trap(-1) day(-1). NGU trap caught more of G. pallidipes while biconical trap caught more G. fuscipes, and the difference was significant (P<0.05). Although the current study indicated low prevalence of trypanosomosis in the study area, the impacts of trypanosomosis on cattle production and productivity should not be neglected. Therefore, attention should be given to control the disease and also the vector.

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“…The predominance of T. congolense infection in cattle may be due to the high number of serodemes of T. congolense as compared with T. vivax and the development of better immune response to T. vivax by the infected animal [16]. Likewise, Mekuria and Gadissa [15] reported similar species of trypanosomes with a high prevalence in Metekel and Awi zones of northwest Ethiopia.…”

Section: Hematological Findingsmentioning

confidence: 96%

“…The high prevalence of the disease especially at Gawetata and Buba PAs could be due to the presence of suitable habitat for the vectors which results in high fly density. From the study of Leak et al [16], it was indicated that variation in tsetse density appeared to be the main factor for variation in the prevalence of trypanosomosis.…”

Section: Hematological Findingsmentioning

confidence: 99%

Bovine trypanosomosis: A threat to cattle production in Chena district, southwest Ethiopia

Alemayehu¹,

Bogale²,

Fentahun³

et al. 2012

OJAS

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A cross-sectional study to determine the prevalence of bovine trypanosomosis was carried out in Chena district, Kefa zone, southwest Ethiopia from September 2010 to January 2011. Blood samples were collected from 391 randomly selected local (zebu) breed cattle in three representative peasant associations (PAs). The buffy coat and Giemsa stained thin blood films examination techniques were used for parasite detection and identification. The packed cell volume (PCV) estimation was also conducted. From a total of 391 cattle, 6.9% (n = 27) of the animals were found positive for trypanosome infection. The trypanosome species observed across the study animals were T. congolense (4.89%), T. vivax (1.54%), and T. b. brucei (0.51%) as single infections. The infection rate of T. congolense and T. b. brucei varied significantly (P < 0.05). The statistical analysis revealed that no significant difference (P > 0.05) in infection rate was found between male (7.79%) and female (5.62%) animals. The prevalence was 2.24% and 8.29% in young and adult cattle, respectively with significant difference (P < 0.05) between them. The prevalence rate in good, medium and poor body conditioned animals were 7.28%, 0.78% and 13.39%, respectively with a statistical significant difference (P < 0.05) among them. The mean PCV of the infected animals (17.56%) appeared significantly (P < 0.05) lower than the non-infected (25.4%). Even if, the present study indicated a low prevalence of bovine trypanosomosis in the study areas, its impact on production and potential transmission to others should not be neglected.

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Epidemiology of bovine trypanosomiasis in the Ghibe valley, southwest Ethiopia 1. Tsetse challenge and its relationship to trypanosome prevalence in cattle

Cited by 51 publications

References 6 publications

Seasonal prevalence of bovine trypanosomosis in a tsetse-infested zone and a tsetse-free zone of the Amhara Region, north-west Ethiopia

Seasonal prevalence of bovine trypanosomosis in a tsetse-infested zone and a tsetse-free zone of the Amhara Region, north-west Ethiopia

Bovine trypanosomosis and its vectors in two districts of Bench Maji zone, South Western Ethiopia

Bovine trypanosomosis: A threat to cattle production in Chena district, southwest Ethiopia

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