Original Research

Natural infection rates and transmission of Theileria annulata by Hyalomma anatolicum anatolicum ticks in the Sudan

D.A. Salih, O.E. Sharieff, A.G. Lazarus, S.M. Hassan, A.M. El Hussein
Onderstepoort Journal of Veterinary Research | Vol 72, No 4 | a186 | DOI: https://doi.org/10.4102/ojvr.v72i4.186 | © 2005 D.A. Salih, O.E. Sharieff, A.G. Lazarus, S.M. Hassan, A.M. El Hussein | This work is licensed under CC Attribution-NoDerivatives 4.0
Submitted: 14 September 2005 | Published: 14 September 2005

About the author(s)

D.A. Salih,
O.E. Sharieff,
A.G. Lazarus,
S.M. Hassan,
A.M. El Hussein,

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Abstract

Hyalomma anatolicum anatolicum nymphs were collected from two localities in the Sudan: Eddamer in Northern Sudan and Wad-Medani in Central Sudan. They were allowed to moult to adult ticks, which were assessed for Theileria infection in their salivary glands using Feulgen stain. At Eddamer, 49.6 % of 123 ticks examined were infected with Theileria and the mean intensity of infection was 1.3 (i.e. the number of infected acini / number of infected ticks). At Wad-Medani, 8.6 % of 162 ticks were infected and the mean intensity of infection was 7.9. The prevalence of infection was higher in female than in male ticks at both localities. When adult H. a. anatolicum were applied onto two susceptible calves, both animals developed the severe form of theileriosis.

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