Factors influencing infections in Rhipicephalus appendiculatus ticks fed on cattle infected with Theileria parva

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dc.creatorYoung, A.S.
dc.creatorDolan, T.T.
dc.creatorMorzaria, S.P.
dc.creatorMwakima, F.N.
dc.creatorNorval, R.A.I.
dc.creatorScott, J.
dc.creatorSherriff, A.
dc.creatorGettinby, George
dc.date1996-09
dc.date2013-06-11T09:23:23Z
dc.date2013-06-11T09:23:23Z
dc.date.accessioned2026-06-27T16:50:16Z
dc.descriptionA large database on the transmission of a stabilate of the Theileria parva Muguga stock from one breed of cattle using two stocks of Rhipicephalus appendiculatus, Muguga and O1 Pejeta was developed and analysed. Factors associated with the ticks and cattle, and the infections developing in cattle were studied in relation to the infection variables in the ticks batches harvested daily from cattle. Generalized Linear Interactive Modelling (GLIM) was used to determine the importance of factors and interactions in influencing the levels of tick infection variables using Type I and Type III sums of squares analyses. Analysis of the 6 varables, prevalence (percentage of ticks infected), abundance (mean number of infected salivary gland acini per tick examined) and intensity (mean number of infected salivary gland acini per infected tick) in batches of 30 male and 30 female ticks showed that 24 covariates, factors or interactions had a significant effect (P<0.05). Certain covariates and factors were particularly important for all 6 tick infection variables; parasitaemia of animal on the day of tick harvest, stabilate dilution administered to animal, month in which tick batch was harvested, minimum packed cell volume of animal over the sampling period, age of animal, and the minimum leukocyte count of the animal over the sampling period. The GLIM analyses were found to be a useful tool in identifying factors that influence infection levels and in devising methods of producing tick batches with more predictable infections.
dc.identifierhttps://hdl.handle.net/10568/29387
dc.identifier.urihttp://hdl.handle.net/123456789/134627
dc.languageen
dc.publisherCambridge University Press
dc.rightsLimited Access
dc.sourceParasitology;113: 255-266
dc.subjecttheileria parva
dc.subjectrhipicephalus appendiculatus
dc.subjectcattle
dc.subjectmetastigmata
dc.subjectmodels
dc.subjectdatabase
dc.subjectdisease transmission
dc.titleFactors influencing infections in Rhipicephalus appendiculatus ticks fed on cattle infected with Theileria parva
dc.typeJournal Article

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