Seroepidemiological Study of Spotted Fever Group Rickettsiae and Identification of a Putative New Species, <i>Rickesttsia</i> sp. Da-1, in Gongliao, Northeast Taiwan
Tick-borne spotted fever group (SFG) rickettsioses were neglected in Taiwan. The study reported a seroepidemiological survey of SFG rickettsiae in residents in Gongliao District, Northeast Taiwan. Blood samples were examined for antibodies against SFG rickettsiae by enzyme-linked immunosorbent assay...
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| Autores principales: | , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/ae0ac76bdedc474b8682e671e80e9a5a |
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| Sumario: | Tick-borne spotted fever group (SFG) rickettsioses were neglected in Taiwan. The study reported a seroepidemiological survey of SFG rickettsiae in residents in Gongliao District, Northeast Taiwan. Blood samples were examined for antibodies against SFG rickettsiae by enzyme-linked immunosorbent assay and immunofluorescence assay. Risk factors were assessed using logistic regression. Ticks parasitizing dogs were collected within a 2 km radius from the houses of seropositive participants, and PCR was performed to detect possible tick-borne pathogens. Of 1108 participants, 75 (6.8%) had antibodies against SFG rickettsiae. Residents were more likely to be seropositive if they were older than 65 years, recruited by Dr. Enjoy’s Clinic, or resided in Jilin village. A total of 184 ticks including 5 species (<i>Rhipicephalus sanguineus</i>, <i>Rhipicephalus haemaphysaloides</i>, <i>Dermacentor auratus</i>, <i>Haemaphysalis hystricis</i>, <i>Haemaphysalis ornithophila</i>) were collected. <i>Rickettsia</i> spp. were detected in 6.5% (12/184) of ticks. <i>Rickettsia</i> sp. TwKM01 was found in 6 <i>R. sanguineus</i> and 4 <i>R. haemaphysaloides</i>; while <i>Rickettsia</i> sp. TwKM03 was identified in 1 <i>R. sanguineus</i>. Moreover, gene-based pairwise analysis indicated identification of a putative new species, <i>Rickettsia</i> sp. Da-1, in <i>D. auratus</i>. These findings provided evidence of SFG rickettsiae infection in ticks and suggested SFG rickettsiae exposure in the residents. |
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