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Animal Science and Veterinary
South Africa
2026

D-Index & Metrics

Animal Science and Veterinary

D-Index
47
Citations
12933
World Ranking
714
National Ranking
7

Ivan Gerard Horak publication distribution in Animal Science and Veterinary in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Animal Science and Veterinary in 2026. The highlighted bar marks where Ivan Gerard Horak sits on this spectrum.

29–33 publications: 1 scientists 34–38 publications: 6 scientists 39–43 publications: 17 scientists 44–48 publications: 23 scientists 49–53 publications: 28 scientists 54–58 publications: 44 scientists 59–63 publications: 66 scientists 64–68 publications: 75 scientists 69–73 publications: 71 scientists 74–78 publications: 85 scientists 79–83 publications: 108 scientists 84–88 publications: 105 scientists 89–93 publications: 84 scientists 94–98 publications: 103 scientists 99–103 publications: 97 scientists 104–108 publications: 95 scientists 109–113 publications: 89 scientists 114–118 publications: 88 scientists 119–123 publications: 109 scientists 124–128 publications: 93 scientists 129–133 publications: 89 scientists 134–138 publications: 95 scientists 139–143 publications: 92 scientists 144–148 publications: 80 scientists 149–153 publications: 75 scientists 154–158 publications: 74 scientists 159–163 publications: 67 scientists 164–168 publications: 53 scientists 169–173 publications: 62 scientists 174–178 publications: 63 scientists 179–183 publications: 50 scientists 184–188 publications: 55 scientists 189–193 publications: 50 scientists 194–198 publications: 27 scientists 199–203 publications: 44 scientists 204–208 publications: 31 scientists 209–213 publications: 28 scientists 214–218 publications: 38 scientists 219–223 publications: 33 scientists 224–228 publications: 36 scientists 229–233 publications: 29 scientists 234–238 publications: 35 scientists 239–243 publications: 23 scientists 244–248 publications: 24 scientists 249–253 publications: 29 scientists 254–258 publications: 28 scientists 259–263 publications: 21 scientists 264–268 publications: 25 scientists 269–273 publications: 11 scientists 274–278 publications: 18 scientists 279–283 publications: 13 scientists 284–288 publications: 18 scientists 289–293 publications: 10 scientists 294–298 publications: 12 scientists 299–303 publications: 11 scientists 304–308 publications: 15 scientists 309–313 publications: 14 scientists 314–318 publications: 14 scientists 319–323 publications: 8 scientists 324–328 publications: 8 scientists 329–333 publications: 13 scientists 334–338 publications: 14 scientists 339–343 publications: 13 scientists 344–348 publications: 10 scientists 349–353 publications: 11 scientists 354–358 publications: 5 scientists 359–363 publications: 8 scientists 364–368 publications: 8 scientists 369–373 publications: 6 scientists 374–378 publications: 7 scientists 379–383 publications: 8 scientists 384–388 publications: 3 scientists 389–393 publications: 4 scientists 394–398 publications: 5 scientists 399–403 publications: 8 scientists 404–408 publications: 5 scientists 409–413 publications: 4 scientists 414–418 publications: 3 scientists 419–423 publications: 8 scientists 424–428 publications: 5 scientists 429–433 publications: 3 scientists 434–438 publications: 5 scientists 439–441 publications: 5 scientists 442+ publications: 99 scientists
29 publications 442+

This scientist: 331 publications — 92nd percentile

92% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 442 publications or more.

Ivan Gerard Horak D-index placement in Animal Science and Veterinary in 2026

The chart shows the D-index (discipline H-index) distribution of Animal Science and Veterinary scientists ranked by Research.com in 2026. The highlighted bar marks where Ivan Gerard Horak sits on this spectrum.

20 D-Index: 5 scientists 21 D-Index: 22 scientists 22 D-Index: 31 scientists 23 D-Index: 44 scientists 24 D-Index: 53 scientists 25 D-Index: 66 scientists 26 D-Index: 80 scientists 27 D-Index: 101 scientists 28 D-Index: 106 scientists 29 D-Index: 116 scientists 30 D-Index: 154 scientists 31 D-Index: 158 scientists 32 D-Index: 143 scientists 33 D-Index: 137 scientists 34 D-Index: 126 scientists 35 D-Index: 134 scientists 36 D-Index: 112 scientists 37 D-Index: 115 scientists 38 D-Index: 105 scientists 39 D-Index: 111 scientists 40 D-Index: 107 scientists 41 D-Index: 87 scientists 42 D-Index: 74 scientists 43 D-Index: 62 scientists 44 D-Index: 61 scientists 45 D-Index: 41 scientists 46 D-Index: 51 scientists 47 D-Index: 43 scientists 48 D-Index: 28 scientists 49 D-Index: 47 scientists 50 D-Index: 40 scientists 51 D-Index: 34 scientists 52 D-Index: 33 scientists 53 D-Index: 43 scientists 54 D-Index: 16 scientists 55 D-Index: 32 scientists 56 D-Index: 21 scientists 57 D-Index: 18 scientists 58 D-Index: 28 scientists 59 D-Index: 33 scientists 60 D-Index: 17 scientists 61 D-Index: 21 scientists 62 D-Index: 18 scientists 63 D-Index: 21 scientists 64 D-Index: 9 scientists 65 D-Index: 20 scientists 66 D-Index: 11 scientists 67 D-Index: 16 scientists 68 D-Index: 12 scientists 69 D-Index: 17 scientists 70 D-Index: 13 scientists 71 D-Index: 15 scientists 72 D-Index: 11 scientists 73 D-Index: 11 scientists 74 D-Index: 14 scientists 75 D-Index: 5 scientists 76 D-Index: 6 scientists 77+ D-Index: 100 scientists
20 D-Index 77+

This scientist: 47 D-Index — 77th percentile

77% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 77 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Animal Science and Veterinary in South Africa Leader Award
  • 2025 - Research.com Animal Science and Veterinary in South Africa Leader Award
  • 2023 - Research.com Animal Science and Veterinary in South Africa Leader Award
  • 2022 - Research.com Animal Science and Veterinary in South Africa Leader Award

Overview

Ivan Gerard Horak is affiliated with the University of Pretoria in South Africa. Their research spans several interrelated scientific fields, focusing predominantly on Medicine, Environmental Science, and Immunology and Microbiology. Within these disciplines, their work emphasizes the subfields of Parasitology, Ecology, Infectious Diseases, Ecology, Evolution, Behavior and Systematics, and Genetics.

The scientist's research addresses multiple topics, including:

  • Vector-borne infectious diseases
  • Viral infections and vectors
  • Animal ecology and behavior studies
  • Plant parasitism and resistance
  • Vector-borne animal diseases
  • Yersinia bacterium, plague, ectoparasites research
  • Wildlife ecology and conservation

Ivan Gerard Horak has contributed to a range of scientific papers published in various venues. Notable recent publications include:

  • Invasive cattle ticks in East Africa: morphological and molecular confirmation of the presence of Rhipicephalus microplus in south-eastern Uganda (2020, Parasites & Vectors)
  • Ticks and tick-borne pathogens infecting livestock and dogs in Tchicala-Tcholoanga, Huambo Province, Angola (2021, Parasitology Research)
  • Sympatry of Amblyomma eburneum and Amblyomma variegatum on African buffaloes and prevalence of pathogens in ticks (2023, Ticks and Tick-borne Diseases)
  • Adaptive radiation and speciation in Rhipicephalus ticks: A medley of novel hosts, nested predator-prey food webs, off-host periods and dispersal along temperature variation gradients (2021, Molecular Phylogenetics and Evolution)
  • Ectoparasites associated with the Bushveld gerbil (Gerbilliscus leucogaster) and the role of the host and habitat in shaping ectoparasite diversity and infestations (2023, Parasitology)

Frequent publication venues for their work include:

  • Parasitology
  • Parasites & Vectors
  • Parasitology Research
  • Research Square (Research Square)
  • Ticks and Tick-borne Diseases

Throughout their career, Ivan Gerard Horak has collaborated extensively with several co-authors. Frequent collaborators include:

  • Boris R. Krasnov (5 joint publications)
  • Kerstin Junker (5 joint publications)
  • Joop Boomker (5 joint publications)
  • Luís Neves (4 joint publications)
  • Dennis Muhanguzi (3 joint publications)

Best Publications

  • Ticks of domestic animals in Africa: a guide to identification of species

    A.R. Walker;A. Bouattour;J.-L. Camicas;A. Estrada-Pena

  • The Genus Rhipicephalus (Acari, Ixodidae): A Guide to the Brown Ticks of the World

    Jane B. Walker;James E. Keirans;Ivan G. Horak

  • The Argasidae, Ixodidae and Nuttalliellidae (Acari: Ixodida) of the world: a list of valid species names

    Alberto A. Guglielmone;Richard G. Robbins;Dmitry A. Apanaskevich;Trevor N. Petney

  • The Argasidae, Ixodidae and Nuttalliellidae (Acari: Ixodida): A World List of Valid Tick Names

    Ivan G. Horak;Jean-Louis Camicas;James E. Keirans

  • The genus Hyalomma Koch, 1844: v. re-evaluation of the taxonomic rank of taxa comprising the H. (Euhyalomma) marginatum koch complex of species (Acari: Ixodidae) with redescription of all parasitic stages and notes on biology

    Dmitry A. Apanaskevich;Ivan G. Horak

  • The known distribution and ecological preferences of the tick subgenus Boophilus (Acari: Ixodidae) in Africa and Latin America

    Agustín Estrada-Peña;A. Bouattour;J. L. Camicas;Alberto Guglielmone

  • Paramphistomiasis of Domestic Ruminants

    I G Horak

  • Efficacy of orally administered fluralaner (BravectoTM) or topically applied imidacloprid/moxidectin (Advocate®) against generalized demodicosis in dogs

    Josephus J. Fourie;Julian E. Liebenberg;Ivan Gerard Horak;Janina Taenzler

  • The ecology of the African vectors of heartwater, with particular reference to Amblyomma hebraeum and Amblyomma variegatum.

    T. N. Petney;I. G. Horak;Y. Rechav

  • Redescription of Haemaphysalis (Rhipistoma) elliptica (Koch, 1844), an old taxon of the Haemaphysalis (Rhipistoma) leachi group from East and southern Africa, and of Haemaphysalis (Rhipistoma) leachi (Audouin, 1826) (Ixodida, Ixodidae).

    Dmitry A. Apanaskevich;Ivan Gerard Horak;J-L. Camicas

  • Boophilus microplus ticks found in West Africa.

    Maxime Madder;Eric Thys;Dirk Geysen;Christian Baudoux

  • Comments on controversial tick (Acari: Ixodida) species names and species described or resurrected from 2003 to 2008

    Alberto A. Guglielmone;Richard G. Robbins;Dmitry A. Apanaskevich;Trevor N. Petney

  • The Genus Hyalomma: VII. Redescription of all Parasitic Stages of H. (Euhyalomma) dromedarii and H. (E.) schulzei (Acari: Ixodidae)

    Dmitry A. Apanaskevich;Anthony L. Schuster;Ivan G. Horak

  • Some avian and mammalian hosts of Amblyomma hebraeum and Amblyomma marmoreum (Acari: Ixodidae)

    I G Horak;K M MacIvor;T N Petney;V De Vos

  • Displacement of Rhipicephalus decoloratus by Rhipicephalus microplus (Acari: Ixodidae) in the Eastern Cape Province, South Africa

    Nkululeko Nyangiwe;Alan Harrison;Ivan Gerard Horak;Ivan Gerard Horak

  • Parasites of domestic and wild animals in South Africa. XXIII. Helminth and arthropod parasites of warthogs, Phacochoerus aethiopicus, in the eastern Transvaal Lowveld.

    Ivan G. Horak;J. Boomker;V. De Vos;F. T. Potgieter

  • Climate change and the genus Rhipicephalus (Acari: Ixodidae) in Africa.

    Jane Mukarugwiza Olwoch;A.S. Van Jaarsveld;Clarke H. Scholtz;Ivan Gerard Horak

  • The ixodid tick burdens of various large ruminant species in South African nature reserves.

    I. G. Horak;F. T. Potgieter;J. B. Walker;V. de Vos

  • Parasites of domestic and wild animals in South Africa. XVI. Helminth and arthropod parasites of blue and black wildebeest (Connochaetes taurinus and Connochaetes gnou).

    Ivan G. Horak;V. De Vos;Moira R. Brown

  • Parasites of domestic and wild animals in South Africa. XXVI. The mosaic of ixodid tick infestations on birds and mammals in the Mountain Zebra National Park

    Horak Ig;Fourie Lj;Novellie Pa;Williams Ej

  • PARASITES OF DOMESTIC AND WILD ANIMALS IN SOUTH AFRICA. XXX. ECTOPARASITES OF KUDUS IN THE EASTERN TRANSVAAL LOWVELD AND THE EASTERN CAPE PROVINCE

    Ivan G. Horak;J. Boomker;A. M. Spickett;V. De Vos

  • Ixodid ticks feeding on humans in South Africa: with notes on preferred hosts, geographic distribution, seasonal occurrence and transmission of pathogens.

    I.G. Horak;I.G. Horak;L.J. Fourie;Heloise Heyne;Jane B. Walker

  • Parasites of domestic and wild animals in South Africa. XV. The seasonal prevalence of ectoparasites on impala and cattle in the Northern Transvaal.

    Ivan Gerard Horak

  • Parasites of domestic and wild animals in South Africa. I. Oestrus ovis in sheep.

    Ivan Gerard Horak

Frequent Co-Authors

Agustín Estrada-Peña
Agustín Estrada-Peña University of Zaragoza
Alberto A. Guglielmone
Alberto A. Guglielmone National Agricultural Technology Institute
Trevor N. Petney
Trevor N. Petney Karlsruhe Institute of Technology
Sonja Matthee
Sonja Matthee Stellenbosch University
Barend Louis Penzhorn
Barend Louis Penzhorn University of Pretoria
Luis Neves
Luis Neves University of Pretoria
Conrad A. Matthee
Conrad A. Matthee Stellenbosch University
Rosina C. Krecek
Rosina C. Krecek University of Johannesburg
James E. Keirans
James E. Keirans Georgia Southern University
Dorothee Stanneck
Dorothee Stanneck Elanco (United States)

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