Titel
Occurrence of Thelazia callipaeda and its vector Phortica variegata in Austria and South Tyrol, Italy, and a global comparison by phylogenetic network analysis
Autor*in
Maria Sophia Unterköfler
Institute of Parasitology, University of Veterinary Medicine Vienna
Patrick Dengg
Institute of Parasitology, University of Veterinary Medicine Vienna
Miriam Niederbacher
Institute of Parasitology, University of Veterinary Medicine Vienna
... show all
Abstract
The zoonotic nematode Thelazia callipaeda infects the eyes of domestic and wild animals and uses canids as primary hosts. It was originally described in Asia, but in the last 20 years it has been reported in many European countries, where it is mainly transmitted by the drosophilid fruit fly Phortica variegata. We report the autochthonous occurrence of T. callipaeda and its vector P. variegata in Austria. Nematodes were collected from clinical cases and fruit flies were caught using traps, netting, and from the conjunctival sac of one dog. Fruit flies and nematodes were morphologically identified and a section of the mitochondrial cytochrome c oxidase subunit I gene (COI) was analysed. A DNA haplotype network was calculated to visualize the relation of the obtained COI sequences to published sequences. Additionally, Phortica spp. were screened for the presence of DNA of T. callipaeda by polymerase chain reaction. Thelazia callipaeda and P. variegata were identified in Burgenland, Lower Austria, and Styria. Thelazia callipaeda was also documented in Vienna and P. variegata in Upper Austria and South Tyrol, Italy. All T. callipaeda corresponded to haplotype 1. Twenty-two different haplotypes of P. variegata were identified in the fruit flies. One sequence was distinctly different from those of Phortica variegata and was more closely related to those of Phortica chi and Phortica okadai. Thelazia callipaeda could not be detected in any of the Phortica specimens.
Stichwort
Oriental eye wormCanine thelaziosisZoophilic fruit flyVector-borne diseaseEmerging zoonotic diseaseCOICytochrome c oxidase subunit I
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:2065372
Erschienen in
Titel
Parasites & Vectors
Band
16
ISSN
1756-3305
Erscheinungsdatum
2023
Publication
Springer Science and Business Media LLC
Erscheinungsdatum
2023
Zugänglichkeit
Rechte
Rechteangabe
© The Author(s) 2023
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