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ISSN : 1225-0171(Print)
ISSN : 2287-545X(Online)
Korean Journal of Applied Entomology Vol.64 No.4 pp.367-371
DOI : https://doi.org/10.5656/KSAE.2025.11.0.048

Molecular Characterization of Otobius megnini Duges (Arachnida: Ixodida: Argasidae) Reappearing in Korean Racehorses

Jong-Uk Jeong, Tae-Jun Hwang, Sang-Kyu Lee1, Hae-Eun Kang, Kwang Shik Choi2*, In-Soon Roh**
Animal and Plant Quarantine Agency, Foreign Animal Disease Division, Gimcheon 39660, Korea
1Korea Racing Authority, Quarantine Management Department, Gwacheon13822 , Korea
2Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu 41566, Korea

Abstract

The spinose ear tick (Otobius megnini) (Acari: Ixodida: Argasidae) is distributed worldwide and has been associated with neuromuscular disorders in horses. In South Korea, the first case was reported in 1989 from a racehorse in Seoul. In this study, 47 specimens were collected from horses in Busan (2023) and Yongin (2024). Morphological and molecular analyses confirmed that all specimens belonged to O. megnini. Sequence analysis of the COX1 and 16S rRNA genes showed high similarity (99.5–100%) to O. megnini from foreign populations. All samples tested negative for Coxiella burnetii, Babesia spp., Anaplasma spp., Ehrlichia spp., Borrelia spp., and severe fever with thrombocytopenia syndrome virus (SFTSV). This study reports the re-emergence of O. megnini in South Korea, following its initial detection in 1989, and provides the first molecular characterization of this tick species in the country.

초록

Vol. 40 No. 4 (2022.12)

Journal Abbreviation Korean J. Appl. Entomol.
Frequency Quarterly
Doi Prefix 10.5656/KSAE
Year of Launching 1962
Publisher Korean Society of Applied Entomology
Indexed/Tracked/Covered By