- UPSpace Home
- →
- Veterinary Science
- →
- Browsing Veterinary Science by UP Author
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing Veterinary Science by UP Author "Horak, Ivan Gerard"
Now showing items 1-20 of 61
-
Espinaze, Marcela P.A.; Hellard, Eléonore; Horak, Ivan Gerard; Cumming, Graeme S. (Cambridge University Press, 2016-03)Ticks and tick-borne pathogens can have considerable impacts on the health of livestock, wildlife and people. Knowledge of tick–host preferences is necessary for both tick and pathogen control. Ticks were historically ...
-
Guglielmone, Alberto A.; Robbins, Richard G.; Apanaskevich, Dmitry A.; Petney, Trevor N.; Estrada-Pena, Agustín; Horak, Ivan Gerard; Shao, Renfu; Barker, Stephen C. (Magnolia Press, 2010)This work is intended as a consensus list of valid tick names, following recent revisionary studies, wherein we recognize 896 species of ticks in 3 families. The Nuttalliellidae is monotypic, containing the single entity ...
-
Horak, Ivan Gerard (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2009-03)Eighty ixodid tick species, 25 argasid tick species and Nuttalliella namaqua occur in South Africa. Twenty-one of the 80 ixodid species and two of the argasid species occur only in this country, while N. namaqua is present ...
-
Olwoch, Jane Mukarugwiza; Van Jaarsveld, A.S.; Scholtz, Clarke H.; Horak, Ivan Gerard (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2007-03)The suitability of present and future climates for 30 Rhipicephalus species in Africa are predicted using a simple climate envelope model as well as a Division of Atmospheric Research Limited-Area Model (DARLAM). DARLAM's ...
-
Estrada-Pena, Agustín; Horak, Ivan Gerard; Petney, Trevor N. (Elsevier, 2008-02)The spread of Amblyomma hebraeum has been reported in Zimbabwe. At the same time there was little or no spread in the distribution of Amblyomma variegatum. This paper examines the climatic cycles and their trends in the ...
-
Guglielmone, Alberto A.; Robbins, Richard G.; Apanaskevich, Dmitry A.; Petney, Trevor N.; Estrada-Pena, Agustín; Horak, Ivan Gerard (Springer, 2009-08)There are numerous discrepancies in recent published lists of the ticks of the world. Here we review the controversial names, presenting evidence for or against their validity and excluding some altogether. We also address ...
-
De Matos, Carlos Antonio; Sitoe, C.; Neves, L.C.B.G.D. (Luís); Nothling, Johan Oliviette; Horak, Ivan Gerard (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2009-06)This study compares the prevalence of ixodid tick species on cattle and goats in Maputo Province. Adult ticks as well as the nymphs of three species, and only the adults of two species were collected from sets of five ...
-
Fourie, Josephus J.; Horak, Ivan Gerard; De Vos, Christa; Deuster, Katrin; Schunack, Bettina (Springer, 2015-08)Speed of kill, repellent (anti-feeding) and acaricidal efficacy of an imidacloprid 10% (w/w) /flumethrin 4.5% (w/w) collar (Seresto®, Bayer) and a spot-on formulation of fipronil 8.3% (w/v) /(S)-methoprene 10% ...
-
Nyangiwe, Nkululeko; Harrison, Alan; Horak, Ivan Gerard (Springer, 2013-11)The objective of the study was to establish to what extent the native tick species Rhipicephalus decoloratus had been displaced by the invasive introduced tick, Rhipicephalus microplus at two communally grazed areas in ...
-
Horak, Ivan Gerard; Jordaan, Andri J.; Nel, Pierre J.; Van Heerden, Joseph; Heyne, Heloise; Van Dalen, E.M.S.P. (AOSIS OpenJournals, 2015-06-09)The distributions of endemic tick vector species as well as the presence of species not endemic to Free State Province, South Africa, were determined during surveys or opportunistic collections from livestock, wildlife ...
-
Espinaze, Marcela P.A.; Hellard, Eléonore; Horak, Ivan Gerard; Cumming, Graeme S. (Elsevier, 2018-05)As changes in the environment have brought wild and domestic animals into closer proximity, cross-species disease transmission has become a major concern in wildlife conservation. The worldwide impacts of tick-borne diseases ...
-
Gallivan, Gordon J.; Spickett, Andrea; Heyne, Heloise; Spickett, Arthur M.; Horak, Ivan Gerard (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2011)Despite many studies regarding tick ecology, limited information on long-term changes in tick populations exist. This study assessed the long-term population dynamics of the less frequently collected questing ixodid ticks ...
-
Horak, Ivan Gerard; Gallivan, Gordon J.; Spickett, Arthur M. (Preoria : Agricultural Research Council, ARC-OVI and the University of Pretoria, 2011-02)Despite a large number of studies on tick biology, there is limited information on long-term changes in tick populations. This study thus aimed to assess the long-term population dynamics of questing ixodid ticks in two ...
-
Spickett, Arthur M.; Gallivan, Gordon J.; Horak, Ivan Gerard (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2011-03)The study aimed to assess the long-term population dynamics of questing Rhipicephalus appendiculatus and Rhipicephalus zambeziensis in two landscape zones of the Kruger National Park (KNP). Ticks were collected by dragging ...
-
Matthee, Sonja; Horak, Ivan Gerard; Van der Mescht, L.; Ueckermann, Edward A.; Radloff, F.G.T (Academic Journals, 2010-10)Fleas, lice, mites and ticks were collected from 41 Rhabdomys pumilio and seven Otomys irroratus at De Hoop Nature Reserve in theWestern Cape Province of South Africa. The aims of the study were firstly to quantify ...
-
Fourie, Josephus Johannes; Liebenberg, Julian Edmund; Nyangiwe, Nnkululeko; Austin, Clinton; Horak, Ivan Gerard; Bhushan, Chandra (Springer, 2013-08)The present study demonstrated the efficacy of a pour-on formulation of fluazuron 2.5% and flumethrin 1% (Drastic Deadline eXtreme (R)) against Rhipicephalus decoloratus and Rhipicephalus microplus on cattle on pasture ...
-
Blair, Jeffrey; Fourie, Josephus J.; Varloud, Marie; Horak, Ivan Gerard (BioMed Central, 2016-05-16)BACKGROUND : Rhipicephalus sanguineus (sensu lato) is a vector of canine babesiosis, anaplasmosis and ehrlichiosis. In order to reduce the chance of transmission of these diseases, an ectoparasiticide should rapidly repel ...
-
Fourie, Josephus J.; Horak, Ivan Gerard; Crafford, Dionne; Erasmus, Heidi L.; Botha, Ockert J. (AOSIS OpenJournals, 2015-03-25)The objective of the present study was to evaluate the therapeutic efficacy of a generic doxycycline tablet (DoxyVet®) against Ehrlichia canis infection in dogs. Canine monocytic ehrlichiosis is caused by the bacterium ...
-
Fourie, Josephus J.; Fourie, L.J.; Horak, Ivan Gerard; Snyman, M.G. (South African Veterinary Association, 2010)The objective of this study was to determine the therapeutic and residual efficacy of a topically applied combination of cyphenothrin (40 %) and pyriproxyfen (2 %) against the tick Haemaphysalis elliptica and the flea ...
-
Stanneck, Dorothee; Kruedewagen, Eva M.; Fourie, Josephus J.; Horak, Ivan Gerard; Davis, Wendell; Krieger, Klemens J. (BioMed Central, 2012-04-27)BACKGROUND: The objectives of the studies listed here were to ascertain the therapeutic and sustained efficacy of 10% imidacloprid (w/w) and 4.5% flumethrin (w/w) incorporated in a slow-release matrix collar, against l ...
Now showing items 1-20 of 61