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Journal Article 1992

Autor: Norval, R.A.I. Perry, Brian D. Hargreaves, S.K.

Compulsory short-interval dipping of cattle for tick control has been enforced in Zimbabwe since the early part of this century. Intensive dipping was initially introduced as a measure to control East Coast fever (ECF), following its introduction from eastern Africa. Dipping was subsequently foun...

Enlace original: https://cgspace.cgiar.org/handle/10568/29961

Investigación en Agricultura
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Norval, R.A.I. ,  Perry, Brian D. ,  Hargreaves, S.K. ,  [Tick and tick-borne disease control in Zimbabwe: What might the future hold] ,  Tick and tick-borne disease control in Zimbabwe: What might the future hold
Journal Article 1999

Autor: Peter, T.F. Bryson, N.R. Perry, Brian D. O'Callaghan, C.J. Medley, G.F. Smith, G.E. Mlambo, G. Horak, I.G. Burridge, M.J. Mahan, S.M.

Adult Amblyomma hebraeum ticks, the principle vector of heartwater (cowdriosis) of domestic ruminants in southern Africa, were collected in pheromone traps placed in Kruger National Park, an exclusively wildlife sanctuary in South Africa. These ticks transmitted Cowdria ruminantium, the rickettsi...

Enlace original: https://cgspace.cgiar.org/handle/10568/29920

Investigación en Agricultura
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Peter, T.F. ,  Bryson, N.R. ,  Perry, Brian D. ,  O'Callaghan, C.J. ,  Medley, G.F. ,  Smith, G.E. ,  Mlambo, G. ,  Horak, I.G. ,  Burridge, M.J. ,  Mahan, S.M. ,  [Cowdria ruminantium infection in ticks in the Kruger National Park] ,  Cowdria ruminantium infection in ticks in the Kruger National Park
Journal Article 1998

Autor: Perry, Brian D. Chamboko, Tafireyi Mahan, S.M. Medley, G.F. Minjauw, B. O'Callaghan, C.J. Peter, T.F.

The authors highlight the reliance on repeated natural infections by tickborne pathogens to maintain immunity in immunized herds. That incidence of clinical heartwater in cattle, caused by Cowdria ruminantium, is low while intensive acaricide use interrupts transmission of pathogens. Evidence is ...

Enlace original: https://cgspace.cgiar.org/handle/10568/29964

Investigación en Agricultura
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Perry, Brian D. ,  Chamboko, Tafireyi ,  Mahan, S.M. ,  Medley, G.F. ,  Minjauw, B. ,  O'Callaghan, C.J. ,  Peter, T.F. ,  [The economics of integrated tick and tick-borne disease control on commercial farms in Zimbabwe] ,  The economics of integrated tick and tick-borne disease control on commercial farms in Zimbabwe
Journal Article 2002

Autor: Gitau, G.K. McDermott, John J. Perry, Brian D.

The association between serum antibody titres to Theileria parva in calves and potential explanatory factors were examined in a longitudinal observational study that was conducted in 5 cohorts of female calves with a total of 225 calves on 188 smallholder dairy farms. The farms were distributed i...

Enlace original: https://cgspace.cgiar.org/handle/10568/29300

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Gitau, G.K. ,  McDermott, John J. ,  Perry, Brian D. ,  [Factors associated with Theileria parva infections in small-holder dairy farms in Murang'a District, Kenya] ,  Factors associated with Theileria parva infections in small-holder dairy farms in Murang'a District, Kenya
Journal Article 1996

Autor: Ochanda, H. Young, A.S. Wells, C. Medley, G.F. Perry, Brian D.

The transmission of Theileria parva by nymphal and adult Rhipicephalus appendiculatus was compared by the assessment of salivary gland infections in tick batches fed on the same group of infected cattle at the same time. When larval and nymphal R. appendiculatus Muguga ticks were fed concurrently...

Enlace original: https://cgspace.cgiar.org/handle/10568/29389

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Ochanda, H. ,  Young, A.S. ,  Wells, C. ,  Medley, G.F. ,  Perry, Brian D. ,  [Comparison of the transmission of Theileria parva between different instars of Rhipicephalus appendiculatus] ,  Comparison of the transmission of Theileria parva between different instars of Rhipicephalus appendiculatus
Journal Article 1997

Autor: Duchateau, L. Kruska, R.L. Perry, Brian D.

Large databases with multiple variables, selected because they are available and might provide an insight into establishing causal relationships, are often difficult to analyse and interpret because of multicollinearity. The objective of this study was to reduce the dimensionality of a multivaria...

Enlace original: https://cgspace.cgiar.org/handle/10568/29499

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Duchateau, L. ,  Kruska, R.L. ,  Perry, Brian D. ,  [Reducing a spatial database to its effective dimensionality for logistic - regression analysis of incidence of livestock disease] ,  Reducing a spatial database to its effective dimensionality for logistic - regression analysis of incidence of livestock disease
Journal Article 1995

Autor: Perry, Brian D. Young, A.S.

This paper reviews the past contributions of epidemiology and economics to the control of tick-borne infections of cattle in Africa. The factors affecting successful and unsuccessful control are evaluated on a gographical and on a production systems basis, with particular reference to Theileria p...

Enlace original: https://cgspace.cgiar.org/handle/10568/29512

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Perry, Brian D. ,  Young, A.S. ,  [The past and future roles of epidemiology and economics in the control of tick-borne diseases of livestock in Africa: The case of theileriosis] ,  The past and future roles of epidemiology and economics in the control of tick-borne diseases of livestock in Africa: The case of theileriosis
Journal Article 1999

Autor: Martínez, T.A. Meltzer, M.I. Perry, Brian D. Burridge, M.J. Mahan, S.M.

An alternative control option for heartwater (Cowdria ruminatium infection) is the establishment and maintenance of endemic stability which would lessen the existing dependence on acaricides. In an endemically stable state, animals become infected by vaccination or natural challenge at an early a...

Enlace original: https://cgspace.cgiar.org/handle/10568/29501

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Martínez, T.A. ,  Meltzer, M.I. ,  Perry, Brian D. ,  Burridge, M.J. ,  Mahan, S.M. ,  [The effect of subclinical experimental Cowdria ruminantium infection in ewes on the growth and milk consumption of pre-weaning lambs] ,  The effect of subclinical experimental Cowdria ruminantium infection in ewes on the growth and milk consumption of pre-weaning lambs
Journal Article 1980

Autor: Kruska, R.L. Perry, Brian D.
Enlace original: https://cgspace.cgiar.org/handle/10568/29523

Investigación en Agricultura
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Kruska, R.L. ,  Perry, Brian D. ,  [Evaluation of grazing lands of Zimbabwe using AVHRR normalised difference vegetation index] ,  Evaluation of grazing lands of Zimbabwe using AVHRR normalised difference vegetation index
Journal Article 1999

Autor: Peter, T.F. Perry, Brian D. O'Callaghan, C.J. Medley, G.F. Mlambo, G. Barbet, A.F. Mahan, S.M.

Analysis of the transmission dynamics of Cowdria ruminantium, the tick-borne rickettsial agent of heartwater in ruminants, requires accurate measures of infection in vector populations. To obtain these, Amblyomma hebraeum ticks were collected at two heartwater-endemic locations in the lowveld and...

Enlace original: https://cgspace.cgiar.org/handle/10568/28497

Investigación en Agricultura
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Peter, T.F. ,  Perry, Brian D. ,  O'Callaghan, C.J. ,  Medley, G.F. ,  Mlambo, G. ,  Barbet, A.F. ,  Mahan, S.M. ,  [Prevalence of Cowdria ruminantium infection in Amblyomma hebraeum ticks from heartwater-endemic areas of Zimbabwe] ,  Prevalence of Cowdria ruminantium infection in Amblyomma hebraeum ticks from heartwater-endemic areas of Zimbabwe

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