The first genetic identification of Theileria ovis subtype KP019206 in sheep in Iran

Document Type: Original Articles

Authors

1 Veterinary Research Department, Kurdistan Agricultural and Natural Resources Research Center, AREEO, Sanandaj, Iran

2 Department of Parasite Vaccine Research and Production, Razi Vaccine and Serum Research Institute, AREEO, Karaj, Iran

Abstract

Ticks and tick-borne diseases, including theileriosis, constitute a major constraint to livestock production. Two species, known as Theileria lestoquardi and Theileria ovis, are suspected to contribute to ovine theileriosis in Iran. However, the epidemiological aspects of ovine theileriosis are poorly understood in this country. In a survey, designed to identify Theileria species in sheep, 52 (47.27%) out of 110 blood samples were positive, based on polymerase chain reaction (PCR) results. Among 52 positive samples, 100% (52/52) were positive for T. ovis, while T. lestoquardi was not detected in any of the samples. The 18S rRNA gene sequence of T. ovis isolated from Kurdistan, Iran has been submitted to the GenBank and can be retrieved by the accession number, KP019206. The current study presents the first report of T. ovis in Iran, using molecular identification techniques. Moreover, this study evaluated the present status of Theileria infection in the west of Iran.

Keywords

Main Subjects


Article Title [French]

Le cycle de vie anormal d’Hyalomma dromedarii (Acari: Ixodidae) sur les dromadaires de la province de Semnan (Nord Est iranien)

Abstract [French]

Hyalomma dromedarii (H. dromedarii) est une tique cosmopolite très caractéristique et répandue chez les dromadaires. Ce parasite est particulièrement bien adapté aux conditions extrêmement arides et au milieu particulier des Camélidés. Dans cette étude nous avons étudié un élevage de dromadaires situé au Sud Ouest de Semnan (Biabanak). Un total de 163 tiques (94 adultes et 67 nymphes) ont été détectées sur tout le corps de deux dromadaires par palpation. Toutes les tiques collectées appartenaient à l’espèce H. dromedarii. Presque toutes les tiques se trouvaient en surface, se déplaçant librement à travers les poils des deux dromadaires. Elles n’étaient pas engorgées de sang et leurs couleurs déclinées du marron clair au marron foncé. Par contre, les nymphes étaient totalement ou partiellement engorgées, arrivant pour certaines au stade de la mue. Il en a été conclu que ces tiques utilisées la même hôte lors des différents stades de leur cycle de vie (one-host ticks ou tique à hôte unique). Ces résultats expliquent probablement la particularité des différents types de cycle de vie d’ H. dromedarii, lui permettant de survivre dans des conditions non favorables.

Keywords [French]

  • dromadaire
  • Hyalomma dromedarii
  • Hôte Unique
  • Semnan
  • Tique

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