Browsing 1992 Onderstepoort Journal of Veterinary Research, Volume 59, 1992 by Issue Date

Browsing 1992 Onderstepoort Journal of Veterinary Research, Volume 59, 1992 by Issue Date

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  • Anonymous; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
  • Ssenyonga, G.S.Z.; Kakoma, I.; Nyeko, J.P.; Buga, R.; Hansen, R.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Randomly selected goat sera from north-western, central, and south-western regions of Uganda were analyzed parasitologically and serologically for evidence of anaplasmosis. Prevalence rates of 3,2 % by parasitemia, 4,8 ...
  • Spencer, J.A.; Van Dijk, A.A.; Horzinek, Marian C.; Egberink, H.F.; Bengis, Roy G.; Keet, D.F.; Morikawa, S.; Bishop, D.H.L.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Lion sera from the Kruger National Park (KNP) dating back to 1977 and from the Etosha National Park (ENP), obtained from 1989 to 1991 , have been analysed by ELISA and Western blot analyses using a genetically engineered ...
  • Van Ark, H.; Meiswinkel, R.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Analyses of 2 light trap catches comprising 6 041 and 1 598 Culicoides showed that the reliability of subsampling such catches increased with subsample size, while the subsampling error decreased with an increase in the ...
  • Spickett, Arthur M.; Fivaz, B.H.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Current small stock tick control practices and producer attitudes towards tick control in the eastern Cape Province of South Africa are discussed. These were ascertained from returns to a questionnaire survey to which 31,2% ...
  • Anonymous; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
  • 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., 1992)
  • Kotze, Sanet H.; Van der Merwe, N.J.; Van Aswegen, G.; Smith, G.A.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Although the histology of the intestinal tract of Crocodylus niloticus is touched on in overall studies on reptilian intestinal tract, a more comprehensive light microscopical study on this area is lacking. Specimens for ...
  • De Waal, D.T.; Potgieter, F.T.; Lopez-Rebollar, Laura M.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Rhipicephalus simus was, for the first time, experimentally proven to be a transovarial vector of Babesia trautmanni of domestic pigs. The nymphal and adult progeny of experimentally infected female ticks transmitted the ...
  • Visagie, Elize J.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    A new species of Lipoptena Nitzsch, 1818 was found on springbok Antidorcas marsupialis Zimmerman, 1780 in the Cape Province and the Orange Free State, South Africa. The flies, for which the name Lipoptena annalizeae is ...
  • Spickett, Arthur M.; Fivaz, B.H.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Current cattle tick control practices and producer attitudes towards tick control in the eastern Cape Province of South Africa are discussed. These were ascertained from answers to a questionnaire survey to which 31,2% of ...
  • Du Plessis, J.L.; Gray, C.; Van Strijp, M.F.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    A 3-fold increase in the numbers of Lyt-2⁺ T cells in the circulating blood of mice infected and reinfected with the Welgevonden stock of Cowdria ruminantium, as determined by flow cytometry, is supportive evidence that ...
  • Verwoerd, Daniel Wynand (Pretoria : Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
  • Otto, Q.T.; Jordaan, Leonora C.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Some flocks of sheep in the Amersfoort district of Transvaal Province developed orf-like lesions, commencing between December and April. The causative agent was identified as a new species of mite belonging to the genus ...
  • Van der Lugt, Jaco J.; Nel, P.W.; Kitching, J.P.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Dried, milled Cestrum laevigatum plant material was drenched to 6 ewes at doses ranging from 2,5 to 10 g/kg/day for 1 to 47 days. The most noticeable clinical signs were depression, anorexia and ruminal stasis. These signs ...
  • Van Aswegen, G.; Kotze, Sanet H.; Van der Merwe, N.J.; Smith, G.A.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Little is known about peptide-storing endocrine cells in the gut of the Nile crocodile. As in the case of other reptiles, particularly the alligator, a limited range of peptide-storing cells was found in the gut of the ...
  • Bennett, G.F.; Earle, R.A.; Peirce, Michael A.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Four species of Leucocytozoon, L. caprimulgi of the Caprimulgidae (nightjars), L. marchouxi of the Columbidae (pigeons and doves), L. grusi of the Gruidae (cranes) and L. tawaki of the Spheniscidae (penguins) are re-described. ...
  • Bennett, G.F.; Earle, R.A.; Peirce, Michael A.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    The leucocytozoids of ten families of Passeriformes - Estrildidae, Fringillidae, Laniidae, Nectariniidae, Passeridae, Ploceidae, Promeropidae, Pycnonotidae, Sturnidae and Zosteropidae-are reviewed. Leucocytozoon roubaudi ...
  • Van der Lugt, Jaco J.; Schultz, R.A. (Rowena Anitra); Fourie, Nicole; Hon, L.J.; Jordaan, P.; Labuschagne, Leonie; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    Lesions in 4 field cases (3 sheep and 1 goat) of 'waterpens' or water belly, caused by the plant Galenia africana, are described. The clinical pathological and pathological findings in 7 sheep which were drenched with ...
  • Horak, Ivan Gerard; Boomker, Jacob Diederik Frederik; Anthonissen, M.; Krecek, R.C.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1992)
    A total of 48 springbok, 48 gemsbok, 23 kudus and 6 giraffes were examined for ticks and lice, while 9 Burchell's zebras and 6 Hartmann's mountain zebras were examined only for ticks. Springbok and gemsbok were shot in ...