Haemonchosis is considered to be the most economically important gastrointestinal disease of small ruminants in the tropics and subtropics. However, chemical anthelmintics, which were the mainstay of control, have been compromised by a high prevalence of resistance worldwide. Copper oxide wire pa...
Medley, G.F.
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Perry, P.D.
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Young, A.S.
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[Preliminary analysis of the transmission dynamics of Theileria parva in eastern Africa]
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Preliminary analysis of the transmission dynamics of Theileria parva in eastern Africa
In order to assess the economic impact of heartwater (Cowdria ruminantium infection) and model the impact of improved vaccines against the disease, a field study was conducted to provide data on livestock productivity indicators in Zimbabwe. Cross-sectional studies were performed in the two main ...
Chamboko, Tafireyi
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Mukhebi, A.W.
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O'Callaghan, C.J.
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Peter, T.F.
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Kruska, R.L.
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Medley, G.F.
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Mahan, S.M.
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Perry, Brian D.
,
[Heartwater and the economics of livestock production on large scale commercial and smallholder farms in Zimbabwe]
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Heartwater and the economics of livestock production on large scale commercial and smallholder farms in Zimbabwe
The tick vectors of heartwater (Cowdria ruminantium infection) in Zimbabwe, Amblyomma hebraeum and Amblyomma variegatum, historically were believed to be confined to the low-lying regions of the south and north-west of the country. However, country-wide surveys performed in 1975-1980 and 1988-199...
Peter, T.F.
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Perry, Brian D.
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O'Callaghan, C.J.
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Medley, G.F.
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Shumba, W.
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Madzima, W.
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Burridge, M.J.
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Mahan, S.M.
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[Distributions of the vectors of heartwater, Amblyomma hebraeum and amblyomma variegatum (Acari: Ixodidae), in Zimbabwe]
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Distributions of the vectors of heartwater, Amblyomma hebraeum and amblyomma variegatum (Acari: Ixodidae), in Zimbabwe
A study was conducted to examine the duration of anthelmintic effect of copper oxide wire particles (COWP) in grazing goats, as data for the persistence of efficacy of COWP in this host species is limited. Forty-eight indigenous male goats were infected naturally by grazing them on Haemonchus con...
Vatta, A.F.
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Waller, P.J.
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Githiori, J.B.
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Medley, G.F.
,
[Persistence of the efficacy of copper oxide wire particles against Haemonchus contortus in grazing South African goats]
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Persistence of the efficacy of copper oxide wire particles against Haemonchus contortus in grazing South African goats