Abnormal life cycle of Hyalomma dromedarii (Acari: Ixodidae) on single-humped camels in Semnan, North-East of Iran

Document Type : Short Communication

Authors

Department of Pathobiology, School of Veterinary Medicine, Semnan University, Semnan, Iran

Abstract

Hyalomma dromedarii (H. dromedarii) is a very characteristic tick with a cosmopolitan distribution, which is closely associated with camels. It is well adapted to extreme dryness of habitat and to camel hosts. In this study, we studied rural husbandry of one-humped camels (dromedaries) in a village in South-West of Semnan (Biabanak). A total of 163 ticks (94 adults and 67 nymphs) were found on two camels by palpation all over the body. All the found ticks were nymphs and adults of H. dromedarii. Almost all the adult ticks were unattached and moving on the camels’ wool. They were not engorged and their body colour varied from light to dark brown. Nymphal ticks were engorged or engorging and some were molting. It was concluded that these ticks were living as one-host ticks on the camels at this site. This finding probably explains why H. dromedarii follows different types of life cycles to survive unfavorable conditions.

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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Archives of Razi Institute
Volume 71, Issue 3
September and October 2016
Pages 195-198

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