Publications by authors named "Helena Steyn"

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Characterisation of South African field Ehrlichia ruminantium using multilocus sequence typing.
Zinathi Dlamkile, Luis Neves, Darshana Morar-Leather, Christopher Brandt, Alri Pretorius, Helena Steyn

Onderstepoort J Vet Res· November 2023

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

Onderstepoort J Vet Res· March 2023

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Transcriptome analysis of Ehrlichia ruminantium in the ruminant host at the tick bite site and in the tick vector salivary glands.
Mabotse A Tjale, Junita Liebenberg, Helena Steyn, Mirinda Van Kleef, Alri Pretorius

Ticks Tick Borne Dis· May 2021

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Ticks and tick-borne pathogens infecting livestock and dogs in Tchicala-Tcholoanga, Huambo Province, Angola.
Gourgélia Sili, Charles Byaruhanga, Ivan Horak, Helena Steyn, Mamohale Chaisi

Parasitol Res· March 2021

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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.
Abdalla A Latif, Helena C Steyn, Antoinette I Josemans, Ratselane D Marumo, Alri Pretorius

Vaccine· November 2020

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In vitro propagation and genome sequencing of three 'atypical' Ehrlichia ruminantium isolates.
Junita Liebenberg, Helena C Steyn, Antoinette I Josemans, Erika Faber, Erich Zweygarth

Onderstepoort J Vet Res· June 2020

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

Onderstepoort J Vet Res· June 2020

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Cellular immune responses induced by secreted proteins and identification of vaccine candidate peptides.
Nontobeko Thema, Alri Pretorius, Selaelo I Tshilwane, Junita Liebenberg, Helena Steyn

Onderstepoort J Vet Res· August 2016

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Molecular investigation of tick-borne haemoparasite infections among transhumant zebu cattle in Karamoja Region, Uganda.
Charles Byaruhanga, Nicola E Collins, Darryn Knobel, Mamohale E Chaisi, Ilse Vorster, Helena C Steyn

Vet Parasitol Reg Stud Reports· June 2016

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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.
Nyawira E Njiiri, B Mark deC Bronsvoort, Nicola E Collins, Helena C Steyn, Milana Troskie

Vet Parasitol· May 2015

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Differences in fibrin fiber diameters in healthy individuals and thromboembolic ischemic stroke patients.
Etheresia Pretorius, Helena Steyn, Mia Engelbrecht, Albe C Swanepoel, Hester M Oberholzer

Blood Coagul Fibrinolysis· December 2011

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Experimental use of the attenuated Ehrlichia ruminantium (Welgevonden) vaccine in Merino sheep and Angora goats.
Erich Zweygarth, Antoinette I Josemans, Helena C Steyn

Vaccine· December 2008

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Ehrlichia ruminantium: a promiscuous genome.
Maria Allsopp, Helena Steyn, Erich Zweygarth, Basil Allsopp

Ann N Y Acad Sci· December 2005

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The genome of the heartwater agent Ehrlichia ruminantium contains multiple tandem repeats of actively variable copy number.
Nicola E Collins, Junita Liebenberg, Etienne P de Villiers, Kelly A Brayton, Elmarié Louw, Helena C Steyn

Proc Natl Acad Sci U S A· January 2005

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A molecular epidemiologic investigation of Salmonella from a meat source to the feces of captive cheetah (Acinonyx jubatus).
Estelle H Venter, Moritz van Vuuren, Johann Carstens, Martha L van der Walt, Badenhorst Nieuwoudt, Helena Steyn

J Zoo Wildl Med· March 2003

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