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United Arab Emirates University (2021)

LIVESTOCK TICKS IN THE UAE : PREVALENCE, DISTRIBUTION, POPULATION DYNAMICS, AND ASSOCIATED MICROORGANISMS

Perveen, Nighat,

Titre : LIVESTOCK TICKS IN THE UAE : PREVALENCE, DISTRIBUTION, POPULATION DYNAMICS, AND ASSOCIATED MICROORGANISMS

Auteur : Perveen, Nighat,

Université de soutenance : United Arab Emirates University

Grade : Doctor of Philosophy (PhD) 2021

Résumé partiel
Ticks are important vectors of an array of viral, bacterial, and protozoan pathogens resulting in a wide range of animal and human diseases in the Middle East and North Africa (MENA). In this study, ticks were collected from camels, cows, sheep, and goats in Abu Dhabi, Dubai, and Sharjah in the United Arab Emirates (UAE). The objectives of the study were to (1) identify tick species of livestock through taxonomic keys and using molecular markers, and determine their prevalence and distribution in the UAE, (2) assess Hyalomma dromedarii seasonal population fluctuation over a year under common camel breeding and management practices, (3) determine bacterial communities’ composition and diversity in camel tick, H. dromedarii using Next-Generation Sequencing, and (4) detect tick-borne microbes and their prevalence in Hyalomma ticks collected from livestock. In the UAE, information on the ticks on camels and other livestock is limited, which is essential for designing and instigating effective tick control strategies in the country. In this study, four aspects of ticks and tick-borne diseases of livestock have been investigated in the UAE. First, four tick species, H. dromedarii, Hyalomma anatolicum, Amblyomma lepidum, and Rhipicephalus sanguineus were identified from livestock including camel, cow, sheep, and goat. These tick species were morphologically identified by using taxonomic keys and confirmed through molecular characterization. This study provided the first DNA molecular record of H. anatolicum, A. lepidum, and R. sanguineus from the UAE. Second, the population fluctuation of H. dromedarii was evaluated over one year. Ticks were collected monthly from camels in Al-Ain, UAE, over 12 months (March 2019 to February 2020). Further, H. dromedarii sex ratio was calculated and parasitological indicators were measured. Results showed that the infestation prevalence was very high (94.33%) during the whole study period. The maximum infestation intensity occurred in June, while the minimum occurred in November. Overall, H. dromedarii ticks were found on camels during the entire year despite monthly applications of an acaricide.

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Page publiée le 24 juin 2022