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Vector Competence Analyses on Aedes aegypti Mosquitoes using Zika Virus
Published on: May 31, 2020
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Hyalomma aegyptium: Observed global distribution, imported specimens, preferred hosts and vector competence
1Climate Change & Infectious Disesases Group, University of Veterinary Medicine Vienna, Veterinaerplatz 1, Vienna, 1210, Austria.
Ticks and Tick-Borne Diseases
|January 24, 2025
Summary
The tortoise tick Hyalomma aegyptium
Area of Science:
- Veterinary Entomology
- Parasitology
- Ecology
Background:
- The tortoise tick, Hyalomma aegyptium, is a significant ectoparasite of tortoises.
- This tick species is known to infest various hosts, including mammals and humans, beyond its primary tortoise hosts.
Purpose of the Study:
- To map the complete natural distribution of Hyalomma aegyptium in the Palearctic region.
- To analyze host records for Hyalomma aegyptium, focusing on tortoise species and other vertebrates.
- To review the vector competence of Hyalomma aegyptium for specific tick-borne pathogens.
Main Methods:
- Compilation of 557 georeferenced locations of Hyalomma aegyptium.
- Analysis of 424 mapped locations detailing host species.
- Review of scientific literature on tick-borne pathogen transmission by Hyalomma aegyptium.
Main Results:
- The natural distribution of Hyalomma aegyptium spans from Morocco to Kyrgyzstan (10°W–73°E, 28–46°N).
- Testudo spp. are the primary hosts (92.9%), with Testudo graeca being the most frequent (92.6%).
- Vector competence was confirmed for Hemolivia mauritanica, Hepatozoon kisrae, and Coxiella burnetii.
Conclusions:
- This study provides the first comprehensive distribution map for Hyalomma aegyptium.
- Hyalomma aegyptium exhibits a wide host range, with significant implications for disease transmission.
- Further research is needed to fully understand the public health and veterinary importance of this tick species.
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