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Browsing South African National Veterinary Repository by Author "Van Gas, L."
Now showing items 1-6 of 6
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Du Plessis, J.L.; Meyer, E.H.H.; Van Gas, L.; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1990)An attempt to establish an inbred line of mice resistant to Cowdria ruminantium failed. First generation couples were constituted from those mice out of 100 males and 100 females that had survived infection with the Kümm ...
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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 ...
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Du Plessis, J.L.; Van Gas, L.; Labuschagne, F.J.; Wijma, S.; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1990)Lyophilized tissues of mice and blood of sheep, infected with either the Kumm, the Welgevonden or the Ball 3 stock of Cowdria ruminantium, remain infective to mice and sheep after storage at 4ºC for 90 days. Freeze-dried ...
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Du Plessis, J.L.; Van Gas, L.; Olivier, J.A.; Bezuidenhout, J. Dürr; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1989)Ten stocks of Cowdria ruminantium (Ball 3, Breed, Comoro, Germishuys, Kümm, Kwanyanga, Mali, Mara, Nonile and Welgevonden) were compared from a cross-immunity, serological and mouse pathogenicity point of view. They were ...
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Du Plessis, J.L.; Van Gas, L.; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1989)Nineteen per cent and 32 % of serologically positive sheep and goats in heartwater endemic areas of the Republic of South Africa were susceptible to challenge with, respectively, the Ball 3 and Welgevonden stocks of Cowdria ...
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Du Plessis, J.L.; Berche, P.; Van Gas, L.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1991)The inability of athymic nude mice to make a drug-aided recovery from infection with either the Kümm or the Welgevonden stocks of Cowdria ruminantium and their inability to mount an immune response, suggest that immunity ...
Now showing items 1-6 of 6