Publications

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theileriosis in zambia: etiology, epidemiology and control measures.in zambia, theileriosis manifests itself in the form of corridor disease (cd), caused by theileria parva lawrencei, and east coast fever (ecf), caused by t. parva parva. of the approximately 3 million cattle in zambia, 1.4 million are at risk to theileriosis. ecf is found in the northern and eastern provinces of the country, while cd appears in southern, central, lusaka and copperbelt provinces. theileriosis is a major constraint to the development of the livestock industry in zambia, with losse ...19947933764
molecular epidemiology of theileria parva in the field.molecular tools based on seminested rflp-pcr techniques to characterize field parasites in bloodspots dried on filter paper permitted investigation of the extent and the dynamics of diversity of theileria parva populations in the field. parallel molecular studies explored the long-term genome stability of various isolates by probing southern blots of ecori digested total genomic dna with four different reference nucleic acid probes. three polymorphic single copy loci encoding for antigen genes w ...199910540308
economics of theileriosis control in zambia.for an economic analysis of theileriosis control, we adopted the total economic cost (tec) method, which calculates the sum of output losses from tick damage, theileriosis mortality and morbidity, and expenditures for treatment or prevention of the disease. at farm level, the tec can be minimized by a specific combination of vector control and/or immunization and an acceptable level of losses. expenditures for vector control include acaricides, construction of dipping or spraying facilities and ...199910540312
transmission of theileria parva in the traditional farming sector in the southern province of zambia during 1997-1998.the incidence of first contact with the protozoan theileria parva was determined in two traditional cattle herds in the southern province of zambia during a period of average rainfall in 1997 and 1998, following a drought in the previous two years. compared to that period, there was a marked increase in the number of rainy season first contacts attributable to transmission by rhipicephalus appendiceulatus adults. however, there were still more dry season contacts that resulted from nymphal trans ...200111254072
distribution and phenology of ixodid ticks in southern zambia.distribution data for epidemiologically important ticks (acari: ixodidae) in the southern province of zambia, one of the main cattle areas of the country, are presented. boophilus microplus (canestrini) was not recorded in southern zambia, whereas boophilus decoloratus (koch) is present throughout the area. new distribution patterns for less economically important ixodid ticks are also discussed. southern zambia is a transition zone because it is the most northern area in africa where mixed rhip ...200212510896
variation in body size in the tick complex rhipicephalus appendiculatus/rhipicephalus zambeziensis.we examined the relationship between body size and the phenology of the tick complex rhipicephalus appendiculatus/rhipicephalus zambeziensis. these ticks transmit theileria parva in cattle. in africa, the body size of r. appendiculatus increases with latitude while the body size of the morphologically similar rhipicephalus zambeziensis is constant at two different latitudes. a larger body size is necessary once survival becomes a constraint. the most plausible explanation for the smaller r. appe ...200415707294
east coast fever and multiple el niño southern oscillation ranks.east coast fever (ecf), a tick-borne disease of cattle, is a major constraint to livestock development in africa in general and southern zambia in particular. understanding the transmission patterns of this disease complex is very difficult as shown by previous studies in southern and eastern zambia due to the interplay of risk factors. in this long-term study, we investigated whether global weather changes had any influence on disease transmission in traditionally kept cattle in southern zambia ...200616213095
disease constraints for utilization of the african buffalo (syncerus caffer) on game ranches in zambia.eco-tourism depending on wildlife is becoming increasingly profitable and landowners are beginning to favor game farming and ecotourism. in these areas, large-scale translocation of wildlife involves a diversity of species and large populations. the african buffalo (syncerus caffer) is one of the major tourist attractions in zambia. it accounts for 8.7% and 12.4% of the total animal species hunted in the game management areas and the total hunting revenue earned in zambia, respectively. it is ec ...200616786973
population genetic analysis and sub-structuring of theileria parva in the northern and eastern parts of zambia.theileriosis, caused by theileria parva, is an economically important disease in africa. it is a major constraint to the development of the livestock industry in some parts of eastern, central and southern africa. in zambia, theileriosis causes losses of up to 10,000 cattle annually.201223146577
theileria parva seroprevalence in traditionally kept cattle in southern zambia and el nino.sero-epidemiological surveys involving 27,526 cattle over a period of 8 years show that theileria parva, the parasite causing east coast fever (ecf) is found throughout southern zambia. higher values of t. parva sero-prevalence were observed in the plateau districts of monze, choma and mazabuka than in the valley districts of siavonga and sinazongwe. our results reveal a strong association between high t. parva sero-prevalence and the presence of the periodic climatic phenomenon known as the el ...200515777915
transmission of theileriosis in the traditional farming sector in the southern province of zambia during 1995-1996.the incidence of first contact with the protozoan theileria parva was determined in three traditional cattle herds in the southern province of zambia in 1995 and 1996. the majority of first contacts occurred during the dry season in june, july and august, at a time of nymphal activity and in the absence of rhipicephalus appendiculatus adults, indicating that larva to nymph transmission plays a more prominent role than nymph to adult transmission under the prevailing conditions.200011059039
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