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- Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Title
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Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Title
Now showing items 12-31 of 118
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(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 ...
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(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 ...
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(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reviews the available literature on the clinical pathology and pathophysiology of heartwater and makes comparisons with unpublished results obtained from a recent study in experimentally-induced heartwater in ...
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(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 ...
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(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 ...
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(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 ...
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(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.
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(Published by the Government Printer, Pretoria., 1987)Using specific antisera prepared against heat-treated and untreated cells in a microtitre system, 7 strains of Campylobacter fetus venerealis were examined for the presence of K-antigen. The technique was effective ...
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(Published by the Government Printer, Pretoria., 1987)Twelve sets of incisors of Cape mountain zebras, 9 of which were from known-age individuals ranging in age from 11 months to 19 years, from the Mountain Zebra National Park, are described and depicted to illustrate not ...
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(Published by the Government Printer, Pretoria., 1987)As a result of a personal survey in 1982, interviewing veterinarians from Louis Trichardt to Uitenhage, it was concluded that bovine heartwater is currently regarded as the most serious tick-borne disease problem in South ...
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(Published by the Government Printer, Pretoria., 1987)Certain species of Geigeria contain sesquiterpene lactones which cause vomiting disease in sheep. Dihydrogriesenin (DHG), a sesquiterpene lactone from G. aspera, contains an α-methylene function which can spontaneously ...
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(Published by the Government Printer, Pretoria., 1987)The sequential development of C. ruminantium (Kwanyanga and Kumm isolates) was followed in caprine leukocyte cultures by light microscopy, direct immunofluorescent microscopy (DFA), indirect immunofluorescent microscopy ...
Now showing items 12-31 of 118