Search Results - "Steyn, Helena C."

Genetic diversity of Ehrlichia ruminantium field strains from selected farms in South Africa by Steyn, Helena C, Pretorius, Alri

“…Heartwater is a tick-borne disease caused by the intracellular rickettsial parasite Ehrlichia ruminantium and transmitted by Amblyomma hebraeum ticks…”
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Th1 and Th2 epitopes of Cowdria polymorphic gene 1 of Ehrlichia ruminantium by Ngoepe, Tlou A, Pretorius, Alri, Steyn, Helena C, Van Kleef, Mirinda

“…Cowdria polymorphic gene 1 (cpg1, Erum2510, ERUM_RS01380) has been shown to induce 30% and 100% protection in sheep immunised by deoxyribonucleic acid (DNA)…”
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The epidemiology of tick-borne haemoparasites as determined by the reverse line blot hybridization assay in an intensively studied cohort of calves in western Kenya by Njiiri, Nyawira E., Bronsvoort, B. Mark deC, Collins, Nicola E., Steyn, Helena C., Troskie, Milana, Vorster, Ilse, Thumbi, S.M., Sibeko, Kgomotso P., Jennings, Amy, van Wyk, Ilana Conradie, Mbole-Kariuki, Mary, Kiara, Henry, Poole, E. Jane, Hanotte, Olivier, Coetzer, Koos, Oosthuizen, Marinda C., Woolhouse, Mark, Toye, Philip

“…•A reverse line blot assay was used to estimate tick-borne haemoparasite prevalence in an intensively studied cohort of indigenous cattle in western…”
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In vitro propagation and genome sequencing of three 'atypical' Ehrlichia ruminantium isolates by Liebenberg, Junita, Steyn, Helena C, Josemans, Antoinette I, Faber, Erika, Zweygarth, Erich

“…Three isolates of Ehrlichia ruminantium (Kümm 2, Omatjenne and Riverside), the causative agent of heartwater in domestic ruminants, were isolated in Ixodes…”
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Molecular investigation of tick-borne haemoparasite infections among transhumant zebu cattle in Karamoja Region, Uganda by Byaruhanga, Charles, Collins, Nicola E, Knobel, Darryn, Chaisi, Mamohale E, Vorster, Ilse, Steyn, Helena C, Oosthuizen, Marinda C

“…Tick-borne diseases (TBDs) are a major constraint to cattle production in pastoral areas in Africa. Although information on tick-borne infections is important…”
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The Genome of the Heartwater Agent Ehrlichia ruminantium Contains Multiple Tandem Repeats of Actively Variable Copy Number by Collins, Nicola E., Liebenberg, Junita, de Villiers, Etienne P., Brayton, Kelly A., Louw, Elmarié, Pretorius, Alri, Faber, F. Erika, van Heerden, Henriette, Josemans, Antoinette, van Kleef, Mirinda, Steyn, Helena C., van Strijp, M. Fransie, Zweygarth, Erich, Jongejan, Frans, Maillard, Jean Charles, Berthier, David, Botha, Marli, Joubert, Fourie, Corton, Craig H., Thomson, Nicholas R., Allsopp, Maria T., Allsopp, Basil A., Beaty, Barry J.

“…Heartwater, a tick-borne disease of domestic and wild ruminants, is caused by the intracellular rickettsia Ehrlichia ruminantium (previously known as Cowdria…”
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Safety and efficacy of an attenuated heartwater (Ehrlichia ruminantium) vaccine administered by the intramuscular route in cattle, sheep and Angora goats by Latif, Abdalla A., Steyn, Helena C., Josemans, Antoinette I., Marumo, Ratselane D., Pretorius, Alri, Christo Troskie, P., Combrink, Michael P., Molepo, Lefoka C., Haw, Anna, Mbizeni, Sikhumbuzo, Zweygarth, Erich, Mans, Ben J.

“…Heartwater is an economically important tick-borne disease of ruminants in Africa. The current commercial vaccine uses live Ehrlichia ruminantium from blood of…”
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Experimental use of the attenuated Ehrlichia ruminantium (Welgevonden) vaccine in Merino sheep and Angora goats by Zweygarth, Erich, Josemans, Antoinette I, Steyn, Helena C

“…Abstract The attenuated Ehrlichia ruminantium (Welgevonden) stock provides protection against a virulent homologous needle challenge in Merino sheep and Boer…”
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Genetic diversity of by Steyn, Helena C., Pretorius, Alri

“…Heartwater is a tick-borne disease caused by the intracellular rickettsial parasite Ehrlichia ruminantium and transmitted by Amblyomma hebraeum ticks…”
Get full text

Th1 and Th2 epitopes of polymorphic gene 1 of by Ngoepe, Tlou A., Pretorius, Alri, Steyn, Helena C., Van Kleef, Mirinda

“…Cowdria polymorphic gene 1 (cpg1, Erum2510, ERUM_RS01380) has been shown to induce 30% and 100% protection in sheep immunised by deoxyribonucleic acid (DNA)…”
Get full text

propagation and genome sequencing of three ‘atypical’ by Josemans, Antoinette I., Steyn, Helena C., Liebenberg, Junita, Zweygarth, Erich, Faber, Erika

“…Three isolates of Ehrlichia ruminantium (Kümm 2, Omatjenne and Riverside), the causative agent of heartwater in domestic ruminants, were isolated in Ixodes…”
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Salmonella isolated from crocodiles and other reptiles during the period 1985-1994 in South Africa by van der Walt, M L, Huchzermeyer, F W, Steyn, H C

“…Over a 10-year period, 173 isolates of Salmonella were obtained during routine isolation from reptiles. Of the 173 isolates, 92 different Salmonella serovars…”
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