Phenology and phylogeny of Hyalommaspp. ticks infesting one-humped camels (Camelus dromedarius) in the Tunisian Saharan bioclimatic zone

Autor: Elati, Khawla, Bouaicha, Faten, Dhibi, Mokhtar, Ben Smida, Boubaker, Mhadhbi, Moez, Obara, Isaiah, Amairia, Safa, Bouajila, Mohsen, Rischkowsky, Barbara, Rekik, Mourad, Gharbi, Mohamed, Elati, Khawla, Bouaicha, Faten, Dhibi, Mokhtar, Ben Smida, Boubaker, Mhadhbi, Moez, Obara, Isaiah, Amairia, Safa, Bouajila, Mohsen, Rischkowsky, Barbara, Rekik, Mourad, Gharbi, Mohamed
Zdroj: Parasite - Journal de la Société Française de Parasitologie; January 2021, Vol. 28 Issue: 1
Abstrakt: In this study, we report the results of a survey of Hyalommaticks infesting one-humped camels in southern Tunisia. Examinations were conducted every second or third month on 406 camels in Tataouine district from April 2018 to October 2019. A total of 1902 ticks belonging to the genus Hyalommawere collected. The ticks were identified as adult H. impeltatum(41.1%; n= 782), H. dromedarii(32.9%; n= 626), H. excavatum(25.9%; n= 493), and H. marginatumfor a single specimen. Although the camels were infested by ticks throughout the year, the highest overall infestation prevalence was observed in April 2018 (p< 0.01). The overall infestation intensity varied between 2.7 and 7.4 ticks/animal. There were no statistically significant differences in tick infestation prevalence based on age categories of the camels, and the overall infestation prevalence was between 82.7% and 97.4%. Female camels were significantly more infested with ticks (88.3%) than males (65.5%) (p< 0.01). The infestation prevalence of camels varied significantly according to the region where sampling took place (p< 0.01), but no correlations were found with abiotic factors. The preferred attachment sites for adult Hyalommaticks were the sternum (38.3%; n= 729/1902), around the anus (36.2%; n= 689/1902), udder (18.4%; n= 350/1902), and inner thigh (6.9%; n= 132/1902). Morphological classification of ticks was corroborated by sequencing the cytochrome c oxidase I (Cox1) and 16S rDNA genes, and these sequences were also used to infer phylogenetic relationships. A single H. dromedariiseemed to be a natural hybrid with H. rufipes. More attention should be devoted by the veterinary services to the infestation of camels by ticks.
Databáze: Supplemental Index