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Molecular epidemiology of Theileria species in ticks and its potential threat to livestock in the Republic of Korea
•21152 ticks were collected, and 6914 ticks (541 pools) were screened for Theileria•211 pools showed positivity, and T. luwenshuni and Theileria sp. were identified•Significant correlations among tick distribution, region, season, and Theileria The purpose of this study was to investigate molecular...
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Published in: | Acta tropica 2023-02, Vol.238, p.106780-106780, Article 106780 |
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Main Authors: | , , , , , , , , |
Format: | Article |
Language: | English |
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Online Access: | Get full text |
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Summary: | •21152 ticks were collected, and 6914 ticks (541 pools) were screened for Theileria•211 pools showed positivity, and T. luwenshuni and Theileria sp. were identified•Significant correlations among tick distribution, region, season, and Theileria
The purpose of this study was to investigate molecular epidemiology of Theileria spp. in ticks in Korea and assess their potential threat from wildlife animals to domestic animals. A total of 21152 hard ticks were collected from Chungcheong and Jeolla provinces of Korea from March to October 2021. Tick species were identified by microscopy and Theileria spp. were screened by nested PCR targeting 18S rRNA. Haemaphysalis spp. were the most abundant tick species, followed by H. longicornis, H. flava, Amblyomma testudinarium, and Ixodes nipponensis. Of the collected ticks, 6914 ticks (541 pools) were screened, and PCR showed 211 positive pools (39.0%; MIR: 3.05). The PCR and phylogenetic analysis identified two Theileria species, T. luwenshuni and Theileria sp., with T. luwenshuni (162/211, 76.78%; MIR: 2.34) being more abundant than Theileria sp. (36/211, 17.06%; MIR: 0.52); co-infection of the two species were noted (13/211, 6.16%; MIR: 0.19). Among the tick species, H. longicornis, especially nymphs, showed the highest prevalence. Regarding season, the highest prevalence was observed in May. Considering the tick and Theileria species identified in this study, H. longicornis nymph and cervine play a critical role in maintaining Theileria spp. in Korea and could be a potential threat to domestic animals, including deer and goats. In addition, there are significant correlations among tick distribution, region, season, and prevalence of Theileria.
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ISSN: | 0001-706X 1873-6254 |
DOI: | 10.1016/j.actatropica.2022.106780 |