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Abstract

Serum samples were collected in 1981 and 1982 from calves less than 12 months old at 244 localities in Zimbabwe and tested by IFAT for antibodies to T. parva. Positive cases were detected at 77% of localities in communal farming areas and at 70% of localities on commercial farms, but their...

Author(s)
Norval, R. A. I.; Fivaz, B. H.; Lawrence, J. A.; Brown, A. F.
Citation
Tropical Animal Health and Production, 1985, 17, 1, pp 19-28
Abstract

Bovine theileriosis, caused by Theileria lawrencei and transmitted by Rhipicephalus appendiculatus Neum. has a limited incidence in Rhodesia, control being achieved by intensive dipping or spraying of cattle to kill the tick vector. Alternative methods of control have been considered, namely the...

Author(s)
Lawrence, J. A.; Norval, R. A. I.
Citation
Rhodesia Agricultural Journal, 1978, 75, 6, pp 173-176
Abstract

This article (originally published in Rhodesian Veterinary Journal, 10 (1979)) discusses the history of tick-borne and tick-associated diseases in cattle (Chrysomya bezziana myiasis (frequently associated with the bites of Hyalomma spp.), rhipicephaline tick toxicosis, sweating sickness (caused by ...

Author(s)
Lawrence, J. A.; Norval, R. A. I.
Citation
Historia Medicinae Veterinariae, 1987, 12, 4, pp 89-101
Abstract

A survey on the incidence of antibodies to Babesia bigemina and B. bovis in calves 1-3-years old at 274 localities in Zimbabwe revealed that B. bigemina occurred throughout the country, together with its main vector, Boophilus decoloratus (Koch). The distribution of Babesia bovis closely followed...

Author(s)
Norval, R. A. I.; Fivaz, B. H.; Lawrence, J. A.; Daillecourt, T.
Citation
Tropical Animal Health and Production, 1983, 15, 2, pp 87-94
Abstract

Between April 1980 and July 1981 serum samples were collected from 30 cattle aged 1-3 years at each of 118 localities throughout Zimbabwe (63 communal farming areas and 55 commercial farms) and screened for antibodies to A. marginale by the capillary tube agglutination test. Tick samples were also...

Author(s)
Norval, R. A. I.; Fivaz, B. H.; Lawrence, J. A.; Brown, A. F.
Citation
Tropical Animal Health and Production, 1984, 16, 2, pp 63-70
Abstract

An historical account is given of the ticks affecting cattle in Rhodesia (Zimbabwe), of their control by dipping, and of the diseases they transmit (in particular East Coast fever caused by Theileria parva, and other theilerial diseases). The success of dipping has been shown by the complete...

Author(s)
Lawrence, J. A.; Norval, R. A. I.
Citation
Rhodesian Veterinary Journal, 1979, 10, 2, pp 28-40

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