Ticks Acari: Ixodidae infesting cattle and some other domestic and wild hosts on the French Mediterranean island of CorsicaReport as inadecuate

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1 UR 045 - Laboratoire de Recherches sur le Développement de l’Elevage 2 Corsican Health Research CHR 3 CMAEE - Contrôle des maladies animales exotiques et émergentes Montpellier 4 CIRAD UMR CMAEE 5 IHPE - Interactions Hôtes-Pathogènes-Environnements 6 Université de Corse 7 A Surgente

Abstract : Background: Corsica is a mountainous French island in the north-western Mediterranean presenting a largediversity of natural environments where many interactions between domestic animals and wild fauna occur.Despite a favourable context for ticks and tick-borne diseases TBDs, the tick fauna of Corsica has not systematicallybeen investigated.Methods: For one year May 2014-May 2015, a survey of ticks infesting cattle was performed in the three Corsicancattle slaughterhouses. Two of these were visited monthly and one quarterly; the ticks were manually collected, justafter flaying. Ticks were identified on their morphology; when necessary, some specimens were also molecularlyidentified by sequencing mitochondrial cox1 cytochrome c oxidase subunit 1 and 16S ribosomal RNA genes andITS2 internal transcribed spacer 2. During the same period, ticks from other domestic animals small ruminants,horses, domestic carnivores and wild animals wild boars, mouflons, deer were occasionally collected.Results: A total of 1,938 ticks was collected from 264 of 418 cattle examined, reared in 86 different localities. Eighttick species were found infesting cattle: Rhipicephalus bursa 56.1 %, Hyalomma marginatum 21.5 %, Hy. scupense8.7 %, Ixodes ricinus 5.7 %, Haemaphysalis punctata 4.8 %, Rh. sanguineus sensu lato 2.3 %, Rh. Boophilusannulatus 0.7 % and Dermacentor marginatus 0.2 %. The cattle infestation rate remained high all year more than50 %. Several tick species showed seasonal variation of their activity. From other Corsican animals 1,196 ticks werecollected. Comparing ticks collected from cattle with those found on other animals, several host preferences wereshown. A noteworthy record is that of a few Ha. sulcata on mouflons which were mainly infested by Rh. bursa.Conclusion: The Corsican tick fauna is characterized by typical Mediterranean species Rh. bursa and Hy.marginatum, but the mild climate and diversified environment provide satisfactory habitats both for species usuallyfound in dry areas Hy. scupense and species usually collected in humid areas I. ricinus.

Keywords : Ticks Ixodidae Cattle Domestic animals Wild animals Molecular identification Corsica

Author: Sébastien Grech-Angelini - Frédéric Stachurski - Renaud Lancelot - Jérôme Boissier - Jean-François Allienne - Sylvain Marco

Source: https://hal.archives-ouvertes.fr/


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