Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Issue Date

Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Issue Date

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  • Nevill, E.M.; Wilkins, C.A.; Zakrisson, G.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Ivermectin treatment of all cattle on a badly infected farm failed to interrupt the transmission of P. bovicola, even though ovipositional blood spots were drastically reduced in numbers for an entire summer season following ...
  • Durand, Anette M.; Barnard, Marie-Luise; Swanepoel, Martha L.; Engelbrecht, Marie M.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Resistance to 20 antibiotics of 128 Salmonella and 97 Escherichia coli isolates from various registrable farm feeds was determined. A high frequency of comparatively low levels of resistance was found in both the Salmonella ...
  • Erasmus, J.A.; Brand, P.A.J.; Galbraith, Marion M.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A total of 150 isolates of Staphylococcus aureus were subjected to the tests on the API Staph system. Of these, 50 were also tested by conventional methods, using the same tests as those found on the API Staph strips. Applying ...
  • Neser, J.A.; Kotze, C.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Increased bleeding time, impaired blood clot retraction and decreased thrombocyte aggregation were observed in pigs infected with virulent haemadsorbing and non-haemadsorbing African swine fever virus isolates. These ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Camus, E.; Barre, N.; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    At present, heartwater in the Caribbean is known with certainty only on Guadeloupe, Marie Galante and Antigua; the first 2 islands are widely infected. The most important factors responsible for particular aspects of ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Malan, Letitia; Du Plessis, J.L.; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    In an epidemiological study undertaken on 23 farms where heartwater occurs endemically, it was found that on an overall average, antibodies to Cowdria ruminantium were detected in 64,3 % of the cattle, 6 adult Amblyomma ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Gothe, R.; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    According to their activity profiles tick pheromones can be characterized as assembly pheromones, aggregation/attachment pheromones, pre-attachment or pre-feeding pheromones, attractant sex pheromones, contact sex pheromones, ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Barre, N.; Camus, E.; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    Experiments were conducted with Creole goats and Amblyomma variegatum ticks in Guadeloupe to investigate whether it is possible to transmit Cowdria ruminantium to susceptible hosts with nymphs fed in the larval stage on ...
  • Coetzee, Bridgette B.; Stanford, G.D.; Davis, D.A.T.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A strain of Boophilus decoloratus, resistant to fenvalerate, was subjected to larval immersion, adult immersion and stall tests using the following classes of ixodicides : organochlorines, organophosphates, a diamidide and ...
  • Potgieter, F.T.; Van Rensburg, L.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Twenty-six calves, born from 25 Anaplasma-infected, intact and splenectomized cows, from a herd kept under strict tick-free laboratory conditions, were monitored for the presence of Anaplasma antibodies, using the rapid ...
  • Cameron, Colin McKenzie; Barnard, B.J.H.; Erasmus, Erna; Botha, W.J.S.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A stable oil emulsion rabies vaccine with a low viscosity was composed by a formula previously employed for Newcastle disease vaccine. Cattle developed high and sustained antibody levels, and guinea pigs were found to ...
  • 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 ...
  • Soll, M.D.; Carmichael, I.H.; Gross, Sheila J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The efficacy of ivermectin, administered in a sustained release formulation by intraruminal pumps at approximate daily dose rates of 20, 40 and 60 µg/kg, was evaluated in 16 cattle against induced infestations of 3 strains ...
  • Potgieter, F.T.; Van Rensburg, L.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Anaplasma centrale was isolated from a field collection of Rhipicephalus simus. Transstadial transmission of A. centrale with adult ticks was demonstrated, but the infection was not carried transovarially. Ticks from this ...
  • Odendaal, M.W.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Clostridium perfringens type A toxin produced in Jayko & Lichstein medium was subjected to various concentration and purification procedures. The results obtained with 3 different ultrafiltration membranes followed by gel ...
  • 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 ...
  • Williams, Mark C.; Bastianello, Stella S.; Nesbit, J.W.; Lange, A. Lucia; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The gross and histopathological lesions of 10 cases in a natural outbreak of aflatoxicosis amongst dogs in the Republic of South Africa are reported. The 10 cases were classified as acute (1 case), subacute (7 cases) and ...
  • Horak, Ivan Gerard; Moolman, L.C.; Fourie, L.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A variety of mammal and bird species in the Mountain Zebra National Park, eastern Cape Province, were examined for Ixodes rubicundus. In addition, caracal (Felis caracal) from the park and its vicinity as well as from the ...
  • Van Wyk, J.A. (Jan Aucamp); Malan, F.S.; Gerber, H.M.; Alves, Regina M.R.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Two field strains of Haemonchus contortus, one from Pretoria on the Highveld and the other from White River in the Lowveld of the Transvaal, showed pronounced resistance to rafoxanide at a dosage rate of 7,5 mg/kg live ...
  • 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, ...