Colonization of Grande Comores Island by a lineage of Rhipicephalus appendiculatus ticks

Tortosa Pablo, Yssouf Amina, Lagadec Erwan, Bakari Annabelle, Foray Coralie, Stachurski Frédéric, Cardinale Eric, Plantard Olivier. 2011. Colonization of Grande Comores Island by a lineage of Rhipicephalus appendiculatus ticks. In : Circulation des zoonoses et des parasitoses dans l'océan indien. Colloque Conjoint Parasitologie-Célébration Vet 2011, 9-11/11/2011 : résumés des communications. Académie malgache. Antananarivo : Académie malgache, Résumé, 17. Colloque Conjoint Parasitologie-Célébration Vet 2011, Antananarive, Madagascar, 9 Novembre 2011/11 Novembre 2011.

Résumé : Background Union of the Comoros suffered a severe East Coast Fever epidemic in 2004. Rhipicephalus appendiculatus was probably involved in pathogen transmission as this competent tick species, although previously absent from Comoros, was sampled on 4 animals on one geographical site during the epidemic. We carried out an entomological survey on all three islands of Union of the Comoros to establish cattle tick species distribution with a special emphasis on R. appendiculatus. We investigated R. appendiculatus intraspecific diversity as this species has been previously shown to be split off into two main cytoplasmic lineages with different ecology, physiology and vectorial competence. This survey also included sampling of live cattle imported from Tanzania to investigate the possibility of tick introduction through animal trade. Results Our data show that Comoros cattle are infested with Amblyomma variegatum, Rhipicephalus microplus and R. appendiculatus. This latter species has established throughout Grande Comore but is absent from Anjouan and Moheli. Interestingly, 43 out of the 47 sequenced R. appendiculatus ticks belong to one single highly competent lineage while ticks from the other lineage where only found on imported cattle or on cattle parked at the vicinity of the harbor. At last, 2 ticks identified as R. evertsi, a species so far virtually absent on Comoros, were sampled on imported cattle. Conclusions This survey shows that importation of live cattle is clearly a source of vector introduction in Comoros. The wide distribution of one highly competent R. appendiculatus lineage on Grande Comore, together with the absence of this species on the two neighbouring islands is in accordance with the rapid and disastrous spread of East Coast Fever epidemics on Grande Comore Island only. Whether the other R. appendiculatus lineage as well as R. evertsi species will succeed in establishing permanently on Grande Comore needs to be monitored. (Texte intégral)

Classification Agris : L72 - Organismes nuisibles des animaux
L73 - Maladies des animaux

Auteurs et affiliations

• Tortosa Pablo, CRVOI (REU)
• Yssouf Amina, CRVOI (REU)
• Lagadec Erwan, CRVOI (REU)
• Bakari Annabelle, Ministère de l'agriculture, de la pêche, de l'environnement, de l'énergie, de l'industrie et de l'artisanat (Comores) (COM)
• Foray Coralie, CRVOI (REU)
• Stachurski Frédéric, CIRAD-BIOS-UMR CMAEE (MDG) ORCID: 0009-0009-5904-3375
• Cardinale Eric, CIRAD-BIOS-UMR CMAEE (REU) ORCID: 0000-0002-3434-3541
• Plantard Olivier, INRA (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/567931/)

Métriques

[ Page générée et mise en cache le 2024-11-05 ]