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Browsing 1989 Onderstepoort Journal of Veterinary Research, Volume 56, 1989 by Subject "Veterinary medicine"
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Stadler, P.; Van Amstel, S.R.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
Commercially available Escherichia coli 055: B5 lipopolysaccharide was administered intravenously experimentally at a dosage of 10 µg/kg to 2 horses. Various clinical and clinico-pathological parameters were monitored ...
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Meiswinkel, R.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
Culicoides (Avaritia) imicola, Kieffer is redescribed and its current worldwide distribution reviewed. It is compared with the closely allied C. (A.) bolitinos sp. nov. Descriptions of both sexes of C. imicola and C. ...
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Meiswinkel, R.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
Culicoides (Avaritia) spinifer Khamala & Kettle, 1971, is made a junior subjective synonym of C.
(A.) glabripennis Goetghebuer, 1935.
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Meiswinkel, R.; Dyce, A.L.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
Synhelea Kieffer, 1925, is resurrected from synonymy to embrace 10 species of Afrotropical Culicoides. C. tropicalis Kieffer, 1913, is the subgenotype. C. vagus is made a synonym of C. dutoiti while apomorphies common to ...
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Verwoerd, Daniel Wynand
(Pretoria : Government Printer, 1989)
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Reinecke, R.K.; Kirkpatrick, R.; Kriel, Anna M.D.; Frank, F.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
Thirteen groups of 4 South African mutton Merinos grazed for 4 weeks with the flock on Kikuyu pastures and were slaughtered for total and differential worm counts at necropsy. Subsequently 12 groups of 8 week tracers grazed ...
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Van der Walt, Martha L.; Steyn, Helena C.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
A number of bacterial isolates which could not be identified as either Salmonella or Citrobacter by conventional biochemical tests and could not be typed as Salmonella with available antisera, were further examined ...
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Prozesky, Leon; Fourie, Niel; Kellerman, T. Stephanus; Labuschagne, Leonie; Schultz, R.A. (Rowena Anitra); Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
Twenty sheep were dosed with either Pachystigma pygmaeum or Fadogia homblei belonging to the Rubiaceae.
The experimentally-induced cardiotoxicoses were monitored by various clinical pathological parameters
and heart ...
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Stoltsz, Wilhelm Heinrich; Blouin, Edmour F.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
Three cattle, which had been experimentally infected with Theileria parva lawrencei and maintained
as carriers of the infection, were each infested simultaneously with clean nymphal Rhipicephalus appendiculatus
and ...
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Dyce, A.L.; Marshall, B.D.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
The value of the dung of game animals as a larval habitat for Culicoides species was briefly investigated in 1973/4 in the Kruger National Park, Transvaal, Republic of South Africa. A total of 4 species in the subgenus ...
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Odendaal, M.W.; Visser, J.J.; Bergh, N.; Botha, W.J.S.; Verwoerd, Daniel Wynand
(Pretoria : The Government Printer, 1989)
Lambs in different stages of development of active immunity against Clostridium perfringens type D were treated with partially purified immunoglobulin in an attempt to superimpose a passive immunity on an existing or ...
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Barnard, B.J.H.; Griessel, M.D.; Van de Pypekamp, H.E.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
The investigation involved 37 herds of cattle numbering 6 280 animals and 5 groups of blue wildebeest (Connochaetes taurinus), consisting of 30-330 wildebeest per group. All the cases of wildebeest-derived malignant catarrhal ...
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Barnard, B.J.H.; Bengis, Roy G.; Griessel, M.D.; De Vos, Valerius; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
Excretion of alcelaphine herpesvirus-1 (AHV-1) is for all practical purposes limited to wildebeest calves under the age of 4 months. Sixty-one per cent of calves 1-2 months of age excreted virus with a mean titre of 9,8 x ...
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Blouin, Edmour F.; De Waal, D.T.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
The development of Babesia caballi in the salivary glands of Hyalomma truncatum was studied at the electron microscopic level. Kinetes were first observed in the salivary glands of ticks on Day 2 of tick feeding and on ...
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De Kock, K.N.; Joubert, P.H.; Pretorius, S.J.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
The present geographical distribution of Lymnaea columella, as recorded in the National Freshwater Snail Collection, is described and discussed. It appears that L. columella is the most successful colonist of all the ...
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Horak, Ivan Gerard; Boomker, Jacob Diederik Frederik; MacIvor, K.M. de F.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
Helminth parasites were collected from 13 grysbok, Raphicerus melanotis, 12 common duikers,
Sylvicapra grimmia, 24 Angora goats and 24 Boer goats killed on a farm in Valley Bushveld in the
eastern Cape Province. Nematodes ...
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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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Horak, Ivan Gerard; Howell, D.J.; Petney, T.N.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
Striped mice, Rhabdomys pumilio, were trapped over a 17 month period in the Thomas Baines
Nature Reserve in the eastern Cape Province of South Africa. Captured mice were placed in cages, over
water, and naturally detaching ...
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Wouters, G.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1989)
Hybrids between Rhipicephalus appendiculatus and R. zambeziensis were reared and glucose-phosphate-isomerase isoenzymes were resolved by agarose electrophoresis. By phenotyping hybrids in F₁ and F₂ generations autosomal ...
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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 ...