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Hermanto, C.Sutanto, A.JumjunidangEdison, H.S.Daniells, J.W.O'Neill, W.T.Sinohin, V.G.O.Molina, A.B.Taylor, P.[Incidence and distribution of Fusarium wilt disease of banana in Indonesia]Incidence and distribution of Fusarium wilt disease of banana in Indonesia

Heartwater, caused by the rickettsial organism Cowdria ruminantium and transmitted by ticks of the genus Amblyomma, is considered to be the most important tick-borne disease of cattle in southern Africa, and is second only in importance to East Coast fever (theileriosis) in eastern Africa. This p...


O'Callaghan, C.J.Medley, G.F.Peter, T.F.Perry, Brian D.[Modelling the transmission dynamics of Cowdria ruminantium: Supporting the case for endemic stability]Modelling the transmission dynamics of Cowdria ruminantium: Supporting the case for endemic stability
Coleman, P.G.Rowlands, G.J.McDermott, John J.Leak, S.G.A.Mulatu, MeronNagda, S.M.D'Ieteren, G.D.M.[Modeling changes in trypanosomiasis transmission following 'pour-on' application]Modeling changes in trypanosomiasis transmission following 'pour-on' application

The mechanisms by which the rabies virus persists in a host population are unclear. Mathematical models of rabies have difficulty in explaining how the rabies virus persists in the host population between epidemics. Simple deterministic models of rabies predict an unrealistically low number of in...


Kitala, P.M.Coleman, P.G.McDermott, John J.[Modelling the potential importance of wildlife for rabies persistence in Machakos District, Kenya]Modelling the potential importance of wildlife for rabies persistence in Machakos District, Kenya

Heartwater, an infectious disease of ruminants caused by the rickettsia Cowdria ruminantium (transmitted by ixodid ticks of the genus Amblyomma and vertically), severely constrains livestock production throughout sub-Saharan Africa. Its epidemiology varies from epidemics with high mortality (on i...


O'Callaghan, C.J.Medley, G.F.Peter, T.F.Mahan, S.M.Perry, Brian D.[Predicting the effect of vaccination of the transmission dynamics of heartwater (Cowdria ruminantium infection)]Predicting the effect of vaccination of the transmission dynamics of heartwater (Cowdria ruminantium infection)

Tsetse-transmitted trypanosomosis affects cattle production over approximately 10 million km2 of Africa. In these areas, trypanocidal drugs, both prophylactic and curative, are the most widely used methods of trypanosomosis control. However, resistance of trypanosomes to the 3 trypanocidal drugs ...


McDermott, John J.Coleman, P.G.Eisler, M.C.Peregrine, A.S.[The effects of resistance to trypanocidal drugs on trypanosome transmission]The effects of resistance to trypanocidal drugs on trypanosome transmission

Heartwater is a disease of high mortality in domestic ruminants (cattle, sheep and goats) in sub-Saharan Africa and in the Caribbean. An intracellular rickettsia, Cowdria ruminantium, is the cause of the disease and is transmitted by ticks of the genus Amblyomma. Losses due to heartwater are high...


Peter, T.F.O'Callaghan, C.J.Medley, G.F.Mahan, S.M.Perry, Brian D.[Biological support for modeling the transmission dynamics of cowdriosis]Biological support for modeling the transmission dynamics of cowdriosis
Williams, D.J.L.Naessens, JanMoloo, S.K.Scott, J.R.[Analysis of peripheral blood leukocyte populations in N'Dama and Boran cattle following Glossina morsitans centralis-transmitted Trypanosoma congolense infection]Analysis of peripheral blood leukocyte populations in N'Dama and Boran cattle following Glossina morsitans centralis-transmitted Trypanosoma congolense infection

Several species of double-stranded RNA (dsRNA) were found to occur in the cassava clone Secundina, which was thought to be virus- free. A large dsRNA molecule (6.6 x 106 Mr = relative molecular mass)(L-dsRNA) was shown to be graft, but not mechanically transmitted and occurred primarily in a nucl...


Gabriel, C.J.Walsh, RNolt, Barry L.[Postharvest root deterioration or vascular streaking of cassava clones (accessions and breeding lines) was evaluated with harvests at different ages (8 and 12 mo.), seasons (beginning and end of wet season), and locations (CIAT-Palmira, Carimagua, and Caribia in Colombia) to assess the effect of environmental factors on cassava genotypes. Vascular streaking was sensitive to any of these environmental factors. Genotype x location interaction was highly significant suggesting that final cv. selection should be carried out in each location. Genetic analysis carried out in one location suggested that inheritance of vascular streaking was, at least partly, controlled by additive factors and was quantitative rather than qualitative. Narrow sense heritability of 0.64 was obtained. Vascular streaking was highly and significantly correlated with root DM content in all the trials conducted during 7 yr. Since free recombination between resistance to vascular streaking and high root DM content may not be possible, the most acceptable balance between these 2 traits should be defined according to the use of product and edaphoclimatic condition of production area prior to selection program. (AS)]Postharvest root deterioration or vascular streaking of cassava clones (accessions and breeding lines) was evaluated with harvests at different ages (8 and 12 mo.), seasons (beginning and end of wet season), and locations (CIAT-Palmira, Carimagua, and Caribia in Colombia) to assess the effect of environmental factors on cassava genotypes. Vascular streaking was sensitive to any of these environmental factors. Genotype x location interaction was highly significant suggesting that final cv. selection should be carried out in each location. Genetic analysis carried out in one location suggested that inheritance of vascular streaking was, at least partly, controlled by additive factors and was quantitative rather than qualitative. Narrow sense heritability of 0.64 was obtained. Vascular streaking was highly and significantly correlated with root DM content in all the trials conducted during 7 yr. Since free recombination between resistance to vascular streaking and high root DM content may not be possible, the most acceptable balance between these 2 traits should be defined according to the use of product and edaphoclimatic condition of production area prior to selection program. (AS)
Young, A.S.Shaw, M.K.Ochanda, H.Morzaria, S.P.Dolan, T.T.[Factors affecting the transmission of African Theileria species of cattle by ixodid ticks]Factors affecting the transmission of African Theileria species of cattle by ixodid ticks

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