A novel Rickettsia, Candidatus Rickettsia takensis, and the first record of Candidatus Rickettsia laoensis in Dermacentor from Northwestern Thailand.

Autor: Chaloemthanetphong A; Department of Biology, Faculty of Science, Biodiversity Research Cluster, Mahidol University, Bangkok, 10400, Thailand., Ahantarig A; Department of Biology, Faculty of Science, Biodiversity Research Cluster, Mahidol University, Bangkok, 10400, Thailand.; Center of Excellence for Vectors and Vector-Borne Diseases, Faculty of Science, Mahidol University at Salaya, Nakhon Pathom, 73170, Thailand., Apanaskevich DA; United States National Tick Collection, The James H. Oliver, Jr. Institute for Coastal Plain Science, Georgia Southern University, Statesboro, GA, 30460-8056, USA., Hirunkanokpun S; Department of Biology, Faculty of Science, Ramkhamhaeng University, Bangkok, 10240, Thailand., Baimai V; Department of Biology, Faculty of Science, Biodiversity Research Cluster, Mahidol University, Bangkok, 10400, Thailand., Trinachartvanit W; Department of Biology, Faculty of Science, Biodiversity Research Cluster, Mahidol University, Bangkok, 10400, Thailand. wachareeporn.tri@mahidol.ac.th.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Jun 21; Vol. 13 (1), pp. 10044. Date of Electronic Publication: 2023 Jun 21.
DOI: 10.1038/s41598-023-37206-w
Abstrakt: Three hundred and forty-four tick samples were collected from vegetation at Taksin Maharat National Park, Tak province, northwestern Thailand. They were morphologically identified and molecularly confirmed by 16S rRNA and COI genes as Dermacentor laothaiensis (n = 105), D. steini (n = 139), and D. auratus (n = 100). These ticks were examined for the spotted fever group rickettsiae (SFGRs) using PCR and DNA sequencing of six genes; 17-kDa, gltA, 16S rRNA, ompA, ompB, and sca4. Of these ticks, 6.10% (21/344) gave positive results for the presence of SFGRs. Phylogenetic analyses of the SFGRs clearly indicated that a novel genotype assigned as Candidatus Rickettsia takensis was detected in D. laothaiensis (19/105) and at lesser frequency in D. steini (1/139). Furthermore, Candidatus Rickettsia laoensis was also found at a low frequency in D. auratus (1/100), the first record in Thailand. Although, the pathogenicities of these SFGRs remain unknown, our findings suggest potential risks of SFGRs being transmitted via ticks near the border between Thailand and Myanmar, a gateway of daily migrations of local people and visitors both legal and illegal.
(© 2023. The Author(s).)
Databáze: MEDLINE
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