Factors affecting morbidity and mortality on-farm and on-station in the Ethiopian highland sheep

Bekele, T.; Woldeab, T.; Lahlou-Kassi, A.; Sherington, J.

doi:10.1016/0001-706x(92)90025-s

Cited by 46 publications

(31 citation statements)

References 5 publications

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“…About 95% of sheep and goats are reported to be infected with helminths with Haemonchus and Trichostrongylus being the key species involved (Rey, 1991). Production losses through mortality and reduced weight gain have been reported by several authors (Oduro, 1972;Schillhorn van Veen, 1973;Allonby & Urquhart 1975;Fabiyi, 1987;Bekele et al, 1992;Nwafor, 2004). Strongyle nematodes are the main cause of parasitic gastroenteritis (PGE) in sheep and goats in Ghana (Agyei & Amponsah, 2001).…”

Section: Introductionmentioning

confidence: 79%

A Review of the Epidemiology of Gastrointestinal Nematode Infections in Sheep and Goats in Ghana

Blackie¹

2014

JAS

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In this paper, the gastrointestinal nematode parasites infecting small ruminants (sheep and goats) in Ghana and the epidemiological factors influencing their prevalence are reviewed and discussed. Twelve nematode species belonging to six families have been reported to infect these livestock in the country with Haemonchus contortus being the most prevalent helminth parasite in both animals. Parasitic gastroenteritis is caused by mixed infection of several nematode species. Management /husbandry practices, climate and host influence are found to be the main factors that affect gastrointestinal nematode infections in sheep and goats. Seasonal changes in the level of infective strongylate nematode larvae on pasture in the different agro-ecological zones of Ghana are reviewed. The number of infective larvae on pasture is reported to be directly related to the pattern of rainfall. Consequently, rainfall could be relied on to predict the rate of transmission of infection in grazing animals. Finally, the relevance of epidemiological knowledge in the development of efficient measures for controlling gastrointestinal nematode infections in sheep and goats in Ghana is discussed.

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Section: Introductionmentioning

confidence: 79%

A Review of the Epidemiology of Gastrointestinal Nematode Infections in Sheep and Goats in Ghana

Blackie¹

2014

JAS

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“…Several investigations on the ecology of nematode larvae in temperate areas have focused on seasonal variation in the availability of GIT nematode larvae on the pasture of domestic herbivores (Brunsdon, 1970;Donald et al, 1978;Evans, 1974;Gibbs, 1967;Ollerenshaw & Smith, 1969;Southcott et al, 1976), or on the effect of vegetation height on pasture contamination (Angus, 1978;Gibson, 1966). Moreover, a number of studies have concentrated on the climatic (seasonal) variation in pasture contamination in tropical ecosystems carrying pure domestic stocks (Banks et al, 1990;Bekele et al, 1992;Cheijina & Fakae, 1984;Chartier, 1991;Dinnik & Dinnik, 1961;Kabasa, 1999;Onyali et al, 1990), or a mixed cattle/game stocking (Ocaido, 1995). Data on the contamination of latrines from a tropical (long-term) ……….…”

Section: Discussionmentioning

confidence: 99%

“…In this study, we investigated PCL in a central African savannah eco-system. The development and survival of infective larvae of GIT nematodes on pasture in tropical environments have been reported to be primarily affected by the seasonal climatic changes between the dry and the wet season (Banks et al, 1990;Bekele et al, 1992;Chartier, 1991;Chiejina & Fakae, 1984;Dinnik & Dinnik, 1961;Onyali et al, 1990). The effect of the vegetation height on larval availability in tropical climates, on the other hand, has so far barely been studied.…”

Section: Introductionmentioning

confidence: 99%

Foraging height levels and the risk of gastro-intestinal tract parasitic infections of wild ungulates in an African savannah eco-system

Apio

Plath²,

Wronski³

2006

Helminthologia

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SummaryGrazing herbivores mainly feed at low feeding height levels, while browsers select food items above ground level. Previous studies on gastrointestinal tract (GIT) nematode parasite burdens of African ungulates have suggested that browsing species hereby minimise the risk of infection with parasites. Here, we investigated the influence of feeding height levels on the pasture larval contamination level (PCL) in a natural African savannah eco-system in Queen Elizabeth National Park, western Uganda. The prevalence and mean abundance of infectious GIT nematode larvae on the pasture were used as measures of pasture contamination. Vegetation samples were examined following standard larval isolation, concentration and counting techniques. We found the feeding height level to be significantly related to the occurrence of infectious GIT nematode larvae, and the contamination was highest at low feeding levels. There was no statistically significant seasonal variation in the prevalence or mean abundance of the contamination of pastures with nematode larvae.

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“…The major problems that greatly affect the economy of sheep and goat production in Ethiopia were diseases (Bekele et al, 1992). Disease alone accounts for 30% mortality in young's and 20% in adults.…”

Section: Introductionmentioning

confidence: 99%

Study on Prevalence of Ovine Lungworm in Goba District, Bale Zone, South East Ethiopia

2017

International Journal of Research Studies in Biosciences

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Factors affecting morbidity and mortality on-farm and on-station in the Ethiopian highland sheep

Cited by 46 publications

References 5 publications

A Review of the Epidemiology of Gastrointestinal Nematode Infections in Sheep and Goats in Ghana

A Review of the Epidemiology of Gastrointestinal Nematode Infections in Sheep and Goats in Ghana

Foraging height levels and the risk of gastro-intestinal tract parasitic infections of wild ungulates in an African savannah eco-system

Study on Prevalence of Ovine Lungworm in Goba District, Bale Zone, South East Ethiopia

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