1994 Onderstepoort Journal of Veterinary Research, Volume 61, 1994

1994 Onderstepoort Journal of Veterinary Research, Volume 61, 1994

 

Contentes Pages: Onderstepoort Journal of Veterinary Research, Vol ??, 19??

CONTENTS

Volume 61: Number 1

Effect of heat-stress on conception in a dairy-herd model in the Natal highlands of South Africa Du Preez, JH, Willemse, JJC & Van Ark, H 1

A method for the assessment of blackfly (Diptera: Simuliidae) attraction to and engorgement on sheep in South Africa Kok, DJ, Fourie, LJ & Oberem, PT 7

Helminth and arthropod parasites of indigenous goats in the northern Transvaal Boomker, JDF, Horak, IG & Ramsay, KA 13

The clinical pathology of heartwater. III. Changes in blood clotting, blood calcium, blood protein, haematocrit and white-cell counts in sheep with experimentally induced heartwater Van Amstel, SR, Reyers, F, Myburgh, E, Pretorius, G & Sacks, P 21

Studies on the presence of endotoxin activity and inflammatory products (Leukotrienes) in cases of experimentally induced heartwater in sheep Van Amstel, SR, Myburgh, E, Mundell, J & Davidson, B 29

Parasites of South African freshwater fish. VI. Nematode parasites of some fish species in the Kruger National Park Boomker, JDF 35

Changes in the blood-gas status of sheep with experimentally induced heartwater Van Amstel, SR, Reyers, F & Myburgh, E 45

Osteology of the pelvic limb of the African elephant (Loxodonta africana) Smuts, MMS & Bezuidenhout, AJ 51

Pseudorabies and transmissible gastroenteritis: a serological survey in South Africa Williams, R, Esterhuysen, JJ & Robinson, JTR 67

Ecology and epidemiology of anthrax in the Etosha National Park, Namibia Lindeque, PM & Turnbull, PCB 71

Afrotropical Culicoides: description and comparison of the pupae of seven species of the Similis supergroup (Diptera: Ceratopogonidae) Nevill, H & Dyce, AL 85

Research communication:

Putative avocado toxicity in two dogs Buoro, IBJ, Nyamwange, SB, Chai, D & Munyua, SM 107

Guide for authors 111

Volume 61: Number 2

A rapid method of estimating the abundance of immature blackflies (Diptera: Simuliidae) Palmer, RW 117

Eight new Afrotropical Spinitectus spp. (Nematoda: Cystidicolidae) from freshwater fishes with a key to the members of the genus in the Region Boomker, JDF & Puylaert, FA 127

Sequential feeding of Ixodes rubicundus on its natural host, Elephantulus myurus: effects on tick mass and on engorgement and moulting success Horak, IG, Du Toit, JS & Fourie, LJ 143

Detachment rhythms of immature Ixodes rubicundus from their natural host, the rock elephant shrew (Elephantulus myurus) Horak, IG, Du Toit, JS & Fourie, LJ 149

African horsesickness epidemiology: five species of Culicoides (Diptera: Ceratopogonidae) collected live behind the ears and at the dung of the African elephant in the Kruger National Park, South Africa Braack, LEO & Meiswinkel, R 155

A nervous disorder in cattle, caused by the plants Ficus ingens var. ingens and Ficus cordata subsp. salicifolia Myburgh, JG, Fourie, N, Kellerman, TS, Cornelius, ST, Ward, C & Van der Lugt, JJ 171

A histocytochemical study of mucus glycoproteins or mucins in the intestinal tract of the African elephant (Loxodonta africana) Kotze, SH & Coetzee, HL 177

Application of immunoperoxidase techniques to formalin-fixed brain tissue for the diagnosis of rabies in southern Africa Last, RD, Jardine, JE, Smit, MME & Van der Lugt, JJ 183

Research communications:

Evaluation of a short-term in vitro growth-inhibition test to determine susceptibility of Trypanosoma vivax stocks to various trypanocides Zweygarth, Er, Kaminsky, R & Moloo, SK 189

First isolation of Campylobacter jejuni from the vaginal discharge of three bitches after abortion in South Africa Odendaal, MW, De Cramer, KGM, Van der Walt, ML, Botha, AD & Pieterson, PM 193

Parasites of South African freshwater fish. VII. Nematodes of some scaled fishes from the Hartbeespoort Dam, Transvaal Boomker, JDF 197

Book review:

Risk analysis, animal health and trade 201

Volume 61: Number 3

Serum- and bone-mineral status of ostriches with tibiotarsal rotation Soley, JT, Bezuidenhout, AJ, Burger, WP & Reyers, F 203

Neuropeptides in the myenteric ganglia and nerve fibres of the forestomach and abomasum of grey, white and black Karakul lambs Groenewald, HB 207

Photosensitivity in South Africa. VII. Chemical composition of biliary crystals from a sheep with experimentally induced geeldikkop Coetzer, JAW, Miles, CO, Wilkins, AL, Erasmus, GL & Kellerman, TS 215

The oesophagus and stomach of the African elephant: a histological, immunocytochemical and immunofluorescence study Van Aswegen, G, Schoeman, JH, De Vos, V & Van Noorden, S 223

The identification of Mycoplasma conjunctivae as an aetiological agent of infectious keratoconjunctivitis of sheep in South Africa Van Halderen, A, Van Rensburg, WJJ, Geyer, A & Vorster, JH 231

Ultrastructure of ostrich (Struthio camelus) spermatozoa. II. Scanning electron microscopy Soley, JT & Roberts, DC 239

Perinatal mortality in lambs of ewes exposed to cultures of Diplodia maydis (= Stenocarpella maydis) during gestation. A study of the central-nervous-system lesions Prozesky, L, Kellerman, TS, Maartens, BP, Schultz, RA & Swart, DP 247

Early and late transcriptional phases in the replication of lumpy-skin-disease virus Fick, WC & Viljoen, GJ 255

Trypanosomes of some sub-Saharan birds Squires-Parsons, D, Bennett, GF & Earle, RA 263

Research communication:

Bovine besnoitiosis: transfer of colostral antibodies with observations possibly relating to natural transmission of the infection Shkap, V, Pipano, E, Marcus, S & Krigel, Y 273

Volume 61: Number 4

The Theiler Memorial Trust Award

The detection of antibodies cross-reacting with Cowdria ruminantium in the sera of domestic ruminants in regions of South Africa where Amblyomma hebraeum does not occur Du Plessis, JL, Boersema, BR & Van Strijp, MF 277

Evidence for cryptosporidial infection as a cause of prolapse of the phallus and cloaca in ostrich chicks (Struthio camelus) Penrith, M-L, Bezuidenhout, AJ, Burger, WP & Putterill, JF 283

Isolation and preliminary characterization of a caprine rotavirus Da Costa Mendes, VM, De Beer, MC, Goosen, GH & Steele, AD 291

A survey of the incidence and importance of the tick-borne diseases heartwater, redwater and anaplasmosis in the heartwater-endemic regions of South Africa Stoltsz, WH, Du Plessis, JL & De Waal, DT 295

Vanadium air pollution: a cause of malabsorption and immunosuppression in cattle Gummow, B, Bastianello, SS, Botha, CJ, Smith, HJC, Basson, AJ & Wells, B 303

A bioequivalence and pharmacokinetic evaluation of two commercial diminazene aceturate formulations administered intramuscularly to cattle Gummow, B, Swan, GE & Du Preez, JL 317

The virtual absence of Culicoides imicola (Diptera: Ceratopogonidae) in a light-trap survey of the colder, high-lying area of the eastern Orange Free State, South Africa, and implications for the transmission of arboviruses Venter, GJ & Meiswinkel, R 327

A rapid method to quantify bacterial contamination on hatching eggs. I. Correlation of optical density with initial bacterial count Pienaar, ACE, Coetzee, L & Bragg, RR 341

Photosensitivity in South Africa. VIII. Ovine metabolism of Tribulus terrestris saponins during experimentally induced geeldikkop Miles, CO, Wilkins, AL, Erasmus, GL & Kellerman, TS 351

Articles presented at the 23rd Annual Congress of the Parasitological Society of Southern Africa as part of the David Bruce centenary celebration

Understanding tsetse flies Langley, PA 361

Sleeping sickness and the central nervous system Pentreath, VW, Baugh, PJ & Lavin, DR 369

The impact of nagana Connor, RJ 379

Epidemiology and control of trypanosomosis Chadenga, V 385

Research communications:

Epidemiology of African horsesickness: duration of viraemia in zebra (Equus burchelli) Barnard, BJH, Bengis, RG, Keet, DF & Dekker, EH 391

Bile enhances the infectivity of third stage larvae of Dictyocaulus filaria Titoy, GAP & Schwan, EV 395

Author index 397

Subject index 405



Recent Submissions

  • Buoro, I.B.J.; Nyamwange, S.B.; Chai, D.; Munyua, S.M.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Two dogs were seen at the University Veterinary Teaching Hospital, Nairobi, Kenya, both having histories of dyspnoea, progressively enlarging abdomens, anasarca, ascites, pleural and pericardial effusion, and pulmonary ...
  • Nevill, Hilda; Dyce, A.L.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    The pupae of Culicoides exspectator Clastrier, C. kobae Cornet & Chateau, C. micheli Cornet & Chateau, C. olyslageri Kremer & Nevill, C. ravus De Meillon and C. (Synhelea) tropicalis Kieffer are described and illustrated ...
  • Lindeque, P.M.; Turnbull, P.C.B.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Analysis of mortality records has revealed distinct patterns in the incidence of anthrax in elephant and plains ungulates. The seasonal peak among the former is in November at the end of the dry season, while among the ...
  • Williams, R.; Esterhuysen, J.J.; Robinson, J.T.R.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Two specific and sensitive, indirect enzyme-linked immunosorbent assays (ELISAs) utilizing a protein G-peroxidase conjugate were developed to detect antibodies to the pseudorabies virus (PRV) and the transmissible ...
  • Smuts, M.M.S. (Malie Marie Sophie), 1933-; Bezuidenhout, A.J. (Abraham Johannes), 1942-; Verwoerd, Daniel Wynand; Seegers, Christine D. (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    The pelvic girdle was characterized by large, transversely-placed ilial wings. The femur was the longest bone of the skeleton and its fovea capitis was situated caudomedially between the epiphyseal line and the articular ...
  • Van Amstel, S.R.; Reyers, Fred; Myburgh, Elsbe; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    The blood-gas status of seven sheep with experimentally induced heartwater during the acute and terminal stages was investigated. Changes in blood gas included a decline in arterial oxygen tension (pO₂) combined with a ...
  • Zweygarth, Erich; Kaminsky, R.; Moloo, S.K.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Two Trypanosoma vivax stocks were initiated in culture with tsetse or culture-derived metacyclics. They were propagated axenically as bloodstream trypomastigotes at 35°C in 4% C0₂ in air. Populations of trypanosomes were ...
  • Anonymous; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
  • Verwoerd, Daniel Wynand; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
  • Shkap, Varda; Pipano, E.; Marcus, S.; Krigel, Y.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Colostral antibodies to B. besnoiti were detected by immunofluorescence in four calves born to two Besnoitia-infected dams, with titres ranging from 1:64 to 1:1024. A specific antibody titre of 1:1024 was found in colostrum ...
  • Titoy, G.A.P.; Schwan, Ernst Volker; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Incubating metacyclic larvae of Dictyocaulus filaria in ovine bile solution prior to per os infection significantly enhanced their infectivity to sheep.
  • Barnard, B.J.H.; Bengis, Roy G.; Keet, D.F.; Dekker, E.H.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    The viraemic period of African horsesickness is significantly longer in experimentally infected zebra than in horses. The virus could be isolated 40 d post-infection from blood and 48 d post-infection from spleen. The ...
  • Chadenga, V.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Tsetse-transmitted trypanosomosis remains a major constraint to the development of agriculture, particularly to that of livestock production in sub-Saharan Africa. It is estimated that 10 million km² of Africa are tsetse ...
  • Stoltsz, Wilhelm Heinrich; Du Plessis, J.L.; De Waal, D.T.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    In an almost 50% response to a survey questionnaire, farmers in the heartwater-endemic regions of South Africa indicated that they were experiencing losses of 1,3, 0,3 and 0,2% in cattle due to heartwater, redwater and ...
  • Da Costa Mendes, V.M. (Vasco Manuel); De Beer, M.C.; Goosen, G.H.; Steele, A.D. (Andrew Duncan); Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Five cytopathic rotavirus strains were isolated in MA 104 cells from stool specimens of kids with diarrhoea. Pre-treatment of the virus with trypsin and incorporation of low levels of trypsin in the maintenance medium ...
  • Anonymous; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
  • Verwoerd, Daniel Wynand (Pretoria : Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
  • Venter, Gert J.; Meiswinkel, R.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Altogether 52 078 Culicoides biting midges of 35 species were collected during February 1990 and 1993 in 40 light-trap collections made on 17 cattle and/or sheep farms in the Bethlehem and Fouriesburg districts of the ...
  • Gummow, Bruce; Swan, Gerry E.; Du Preez, J.L.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    The bioequivalence of the diminazene formulation Veriben (Centaur) was determined in cattle (n=10) by means of a single-dose, randomized cross-over experiment. The results of nine statistical procedures commonly used for ...
  • Connor, R.J.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    The disease in cattle, called nagana in Zulu land, was linked with trypanosomal parasitaemia and tsetse flies. Nagana occurs in livestock throughout the tsetse belts of Africa. Wild animals are tolerant of trypanosomal ...

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