Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Title

Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Title

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  • Identification of drugs effective against Cowdria ruminantium using a mouse screening system 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); McHardy, N.; MacKenzie, P.K.I.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Heartwater is a tick-transmitted rickettsial infection of ruminants, caused by Cowdria ruminantium. The tetracyclines are the only compounds available for therapy of the disease. A screen, using mice infected with C. ...
  • The identification of factors capable of reversing the core-mediated inhibition of the bluetongue virus transcriptase 
    Huismans, H. (Henk), 1942-; Van Dijk, A.A.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The in vitro transcription reaction of bluetongue virus (BTV) is characterized by a core-mediated, temperature-dependent inhibition at high core concentrations and temperatures (Van Dijk & Huismans, 1980; Huismans, Van ...
  • Immunization of sheep against the larval stage of Taenia multiceps 
    Verster, Anna; Tustin, R.C.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A trial with 200 ewes and 127 lambs showed that vaccination of lambs with 2 doses of Oncosphere Secretory Antigen (OSA) 4 weeks apart, at either 4-8 and 8-12 weeks or at 12-16 and 16-20 weeks of age, was equally effective ...
  • The incidence of Coxiella burnetii antibodies in cattle in the Transvaal 
    Gummow, Bruce; Poerstamper, N.; Herr, S.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    With the use of the complement fixation test, 8 900 cattle were tested for antibodies to Coxiella burnetli. These were randomly selected from 178 different farms in 37 districts in the Transvaal. The percentage of cattle ...
  • The infection and treatment method of vaccination against heartwater 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Van der Merwe, Lente; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The history of vaccination techniques against heartwater and the development of the infection and treatment method are reviewed briefly. Present techniques and their shortcomings are defined and possible areas of improvement ...
  • An investigation into the clinical pathological changes and serological response in horses experimentally infected with Babesia equi and Babesia caballi 
    De Waal, D.T.; Van Heerden, J.; Potgieter, F.T.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Serologically negative horses, as determined with the indirect fluorescent antibody test (IFA), were infected with Babesia equi and 60 days later with Babesia caballi. The only clinical signs of disease observed in these ...
  • The isolation of a paramyxovirus from pigeons in South Africa 
    Pienaar, Anna C.E.; Cilliers, J.A.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A paramyxovirus was isolated from diseased pigeons, submitted to the Poultry Section of the Veterinary Research Institute, Onderstepoort, for post-mortem examination. The mean death time for the isolates was determined ...
  • The isolation of Leptospira interrogans serovar pomona and related serological findings associated with a mixed farming unit in the Transvaal 
    Gummow, Bruce; De Lange, J.F.; Turner, G.V.; Redman, A.R.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    This is the first known isolation in the Republic of South Africa (RSA) of the serovar pomona from the organs of porcine foetuses as well as from the renal lymphnodes of slaughter pigs showing chronic nephritis. In addition, ...
  • Leptospirosis as a cause of "white spot" kidneys in South African pig abattoirs 
    Hunter, Pamela; Van der Vyver, F.H.; Henton, Marijke M.; Herr, S.; De Lange, J.F.; Selmer-Olsen, Anne; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The incidence of isolation of Leptospira sp. from the kidneys of slaughter pigs with “white-spot" macroscopic lesions was determined. Histology and general bacteriology were performed. Leptospira pomona was isolated from ...
  • Metabolism and genetics of chlamydias and rickettsias 
    Williams, J.C.; Vodkin, M.H.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Chlamydial and rickettsial diseases pose a hazard to man and to domesticated and wild animals. The virulence mechanisms which aid the establishment of these obligate intracellular parasites in the eukaryotic host are ...
  • Morphology and development of Cowdria ruminantium in Amblyomma ticks 
    Kocan, K.M.; Bezuidenhout, J.D.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The morphology and development of Cowdria ruminantium have been studied in Amblyomma hebraeum and A. variegatum. Colonies of C. ruminantium have so far been demonstrated microscopically in gut, salivary gland cells, ...
  • Musca nevilli sp. nov. (Diptera : Muscidae), a dung-breeding fly from South Africa 
    Kleynhans, K.P.N.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The adults, puparium and 3rd instar larva of a dung-breeding fly, Musca nevilli sp. nov. are described in the subgenus Eumusca. The adults are characterized by 4 dark postsutural mesonotal vittae, 1-2 bristles dorsally on ...
  • The natural control of heartwater vectors 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Spickett, Arthur M.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Socio-economic factors and environmental considerations have increasingly encouraged the search for methods of tick control other than acaricidal treatment. Biological control management regimes have, so far, not proved ...
  • Natural transmission of heartwater 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Bezuidenhout, J. Dürr; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Heartwater has been transmitted experimentally by 12 Amblyomma species. Their importance depends on the extent of their distribution, adaptation to domestic stock and their efficacy as vectors. Except for one report of ...
  • The non-specific resistance of cattle to heartwater 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Du Plessis, J.L.; Malan, Letitia; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A distinction is drawn between the non-specific resistance to heartwater of very young calves and that of cattle older than a year. The suckling-calf resistance is at its greatest during the first few weeks after birth and ...
  • The occurrence of Schistosoma mattheei in the south-western Transvaal 
    Joubert, P.H.; Hamilton-Attwell, V.L.; Kruger, F.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    To determine whether Schistosoma mattheei is present in the south-western Transvaal, sixty habitats were searched for the intermediate host snail, Bulinus africanus. Ten populations of this snail were located, 2 of which ...
  • Ovine hepatogenous photosensitivity caused by the plant Nidorella foetida (Thunb.) DC. (Asteraceae) 
    Schneider, D.J.; Green, Jennifer R.; Collett, M.G.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Following a field outbreak of hepatogenous photosensitivity in sheep, an identical condition was reproduced experimentally by dosing 2 sheep with green, homogenized, Nidorella foetida material, collected from the camp where ...
  • Parasites in sheep grazing on Kikuyu (Pennisetum clandestinum) pastures in the winter rainfall region 
    Reinecke, R.K.; Kirkpatrick, R.; Swart, Lydia; Kriel, Anna M.D.; Frank, F.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Regular worm counts were done post-mortem on sheep that had grazed on Kikuyu pastures at the Elsenburg Research Station near Stellenbosch, a winter rainfall region. Major species were Trichostrongylus colubriformis, ...
  • Parasites of domestic and wild animals in South Africa. XXII. Ixodid ticks on domestic dogs and on wild carnivores 
    Horak, Ivan Gerard; Guillarmod, Amy Jacot; Moolman, L.C.; De Vos, Valerius; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Ixodid ticks were collected from 4 dogs on smallholdings near Grahamstown, eastern Cape Province, on 1 or more occasions each week for periods ranging from 9-36 months. Fourteen tick species were recovered and the seasonal ...
  • Parasites of South African Wildlife. I. Helminths of bushbuck, Tragelaphus scriptus, and grey duiker, Sylvicapra grimmia, from the Weza State Forest, Natal 
    Horak, Ivan Gerard; Boomker, Jacob; Keep, M.E.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Thirteen bushbuck, Tragelaphus scriptus, and 13 grey duikers, Sylvicapra grimmia, were culled in the Weza State Forest, Natal, from May 1983-May 1984. The maximum number of worms recovered from a single bushbuck was 393. ...