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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  • Biochemical studies on the eggs of Amblyomma hebraeum 
    Neitz, Albert Walter Herman; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Vermeulen, N.M.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The isolation, characterization and kinetic properties of a toxic and non-toxic anti-protease from the eggs of A. hebraeum are compared with similar data obtained for eggs of other tick species. The biochemistry of various ...
  • Biochemical studies on the salivary glands and haemolymph of Amblyomma hebraeum 
    Neitz, Albert Walter Herman; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Vermeulen, N.M.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The functional significance of some components of salivary glands and of their secretion and of haemolymph of Amblyomma hebraeum and other tick species is reviewed with respect to host responses at the attachment site, the ...
  • The block method of vaccination against 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 critical evaluation is made of reports in the literature on the block method of vaccination and the relevant factors that play a role in the immunization against heartwater are also discussed. The most important of these ...
  • Broiler pulmonary hypertension syndrome. I. Increased right ventricular mass in broilers experimentally infected with Aegyptianella pullorum 
    Huchzermeyer, Fritz W.; Cilliers, J.A.; Diaz Lavigne, Celestina D.; Bartkowiak, R.A.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Infection with the obligatory intra-erythrocytic anaplasma-like rickettsia Aegyptianella pullorum in 4-week old broilers at a moderate altitude of 1 200 m produced a significant increase in the mean relative right ...
  • Broiler pulmonary hypertension syndrome. II. The direct measurement of right ventricular and pulmonary artery pressures in the closed chest domestic fowl 
    Guthrie, Alan John; Huchzermeyer, Fritz W.; Cilliers, J.A.; Killeen, Valerie M.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A technique for the catheterisation of the right ventricle and pulmonary artery of the domestic fowl is described. Mean peak systolic, minimum diastolic and mean pressures measured in the right ventricle and pulmonary ...
  • Cardiac glycoside poisoning in sheep caused by Urginea physodes (Jacq.) Bak. and the isolated physodine A 
    Nel, P.W.; Jordaan, P.; Anderson, L.A.P.; Kellerman, T. Stephanus; Reid, Clare; Schultz, R.A. (Rowena Anitra); Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Urginea physodes (Jacq.) Bak., a species closely related to or possibly synonymous with U. pusilla, is described and its distribution given. Four bufadienolides were isolated from U. physodes and the approximated LD₅₀ and ...
  • Chemical control of the heartwater vectors 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Schroder, J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    This paper reviews available literature on the efficacy of acaricides against Amblyomma hebraeum and other tick species, and presents information on tests done with registered chemicals in the laboratory. Little published ...
  • The clinical pathology and pathophysiology of heartwater : a review 
    Guthrie, Alan John; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Van Amstel, S.R.; Reyers, Fred; Oberem, P.T.; Killeen, Valerie M.; Matthee, O.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    This paper reviews the available literature on the clinical pathology and pathophysiology of heartwater and makes comparisons with unpublished results obtained from a recent study in experimentally-induced heartwater in ...
  • A collapsible, semi-automatic, tent-type, emergence trap, suitable for sampling Culicoides (Diptera : Ceratopogonidae) from a wide range of habitats 
    Pajor, I.T.P.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A lightweight, collapsible, tent-type, trap of 1 m² floor-area was developed for the collection of emerging Culicoides from a wide range of habitats. It is cheap; easy to build, transport and erect; withstands adverse ...
  • The colonization and life-cycles of Musca lusoria, Musca xanthomelas and Musca nevilli, vectors of Parafilaria bovicola in South Africa 
    Nevill, E.M.; Sutherland, B.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Thriving, permanent colonies of Musca xanthomelas and later of Musca nevilli were successfully established. However, because of the low reproduction potential of Musca lusoria a small colony only was kept for a limited ...
  • A comparative study of the growth of Campylobacter fetus strains in liquid media 
    Van der Walt, Martha L.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The growth of C. fetus fetus, C. fetus venerealis and C. fetus venerealis biotype intermedius was examined in 10 liquid media. From the data obtained, a 10% inoculum size and an oxygen level of 6% seemed imperative for ...
  • The construction of genomic libraries of Cowdria ruminantium in an expression vector, lambda gt11 
    Ambrosio, R.E.; Du Plessis, J.L.; Bezuidenhout, J.D.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Genomic libraries of the Welgevonden and Kwanyanga isolates of Cowdria ruminantium have been constructed in an expression vector. These libraries contain approximately 4 x 10⁵ and 3 x 10⁵ recombinants respectively.
  • The control of heartwater by means of tick control 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Bezuidenhout, J. Dürr; Bigalke, R.D.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Two main methods are currently being used by farmers in the heartwater regions to control this disease in cattle and other stock, namely strategic control of ticks and total control of ticks. Some farmers make successful ...
  • Control of induced infestations of adult Amblyomma hebraeum with sustained release ivermectin 
    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 ...
  • The control of Parafilaria bovicola transmission in South Africa 
    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 ...
  • Cowdria ruminantium infection in the mouse : a review 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); MacKenzie, P.K.I.; McHardy, N.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The current knowledge of the pathogenicity, clinical signs and mortality of artificial infections by syringe inoculation of Cowdria ruminantium in laboratory and wild strains of mice is reviewed. It is concluded that a ...
  • Cowdria ruminantium: stability and preservation of the organism 
    Logan, L.L.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Blood collected in either sodium heparin or disodium edetate vacutainers from febrile goats infected with 4 isolates of Cowdria ruminantium and cryopreserved with 10% dimethyl sulphoxide at -70⁰C and -196⁰C was an effective ...
  • Cross-immunity between isolates of Cowdria ruminantium 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Logan, L.L.; Birnie, E.F.; Mebus, C.A.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Cross-immunity studies in goats and mice using 4 isolates of Cowdria ruminantium, 2 from the Republic of South Africa (Kwanyanga and Kümm), 1 from the Republic of Mali (Mali 1), and 1 from Guadeloupe (Garde1), demonstrated ...
  • Danger of introducing heartwater onto the American mainland : potential role of indigenous and exotic Amblyomma ticks 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Barre, N.; Uilenberg, Gerrit; Morel, P.C.; Camus, E.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The existence of heartwater on 3 islands of the Central Lesser Antilles and the presence of an efficient vector originating from Africa, Amblyomma variegatum, on most of the islands of this region constitute a serious ...
  • Demonstration of growth-inhibitory as well as growth-stimulatory factors in medium conditioned by lung lavage cells stimulated with a chemotactic factor secreted by jaagsiekte tumour cells 
    Verwoerd, Daniel Wynand; Myer, M.S.; Garnett, H.M.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Both growth-inhibitory and growth-stimulatory factors were detected in vitro in medium from chemotactically stimulated cultures of lung lavage cells. The macrophage component of the lavage cells was found to produce a ...