Browsing 1990 Onderstepoort Journal of Veterinary Research, Volume 57, 1990 by Author "Potgieter, F.T."

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An attempt to improve the immunization of sheep against heartwater by using different combinations of 3 stocks of Cowdria ruminantium

Du Plessis, J.L.; Potgieter, F.T.; Van Gas, L.; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1990)

Neither sheep immune to the Ball 3, the Kwanyanga or the Mara stocks of Cowdria ruminantium nor those immunized with combinations of these 3 stocks were protected against challenge with the Mali stock. Against challenge ...
The isolation and transmission of an unidentified Babesia sp. to cattle by Hyalomma truncatum Koch 1844

De Waal, D.T.; Potgieter, F.T.; Combrink, M.P.; Mason, T.E.; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1990)

An unidentified Babesia sp. which causes a mild disease in cattle was isolated in a splenectomized ox that received pooled blood from field cattle. That this organism is pleomorphic and resembles Babesia occultans makes ...

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