Parasites, Hosts and Diseases

  • 제61권3호
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  • Pages.272-281
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  • 2023
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  • 2982-5164(pISSN)
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  • 1738-0006(eISSN)
대한기생충학·열대의학회 (The Korea Society for Parasitology and Tropical Medicine)
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Disease vector occurrence and ecological characteristics of chiggers on the chestnut white-bellied rat Niviventer fulvescens in Southwest China between 2001 and 2019

  • Yan-Ling Chen (Institute of Pathogens and Vectors, Yunnan Provincial Key Laboratory for Zoonosis Control and Prevention, Dali University) ;
  • Xian-Guo Guo (Institute of Pathogens and Vectors, Yunnan Provincial Key Laboratory for Zoonosis Control and Prevention, Dali University) ;
  • Wen-Yu Song (Institute of Pathogens and Vectors, Yunnan Provincial Key Laboratory for Zoonosis Control and Prevention, Dali University) ;
  • Tian-Guang Ren (Nursing College of Dali University) ;
  • Lei Zhang (Institute of Pathogens and Vectors, Yunnan Provincial Key Laboratory for Zoonosis Control and Prevention, Dali University) ;
  • Rong Fan (Institute of Pathogens and Vectors, Yunnan Provincial Key Laboratory for Zoonosis Control and Prevention, Dali University) ;
  • Cheng-Fu Zhao (Institute of Pathogens and Vectors, Yunnan Provincial Key Laboratory for Zoonosis Control and Prevention, Dali University) ;
  • Zhi-Wei Zhang (Institute of Pathogens and Vectors, Yunnan Provincial Key Laboratory for Zoonosis Control and Prevention, Dali University) ;
  • Wen-Ge Dong (Institute of Pathogens and Vectors, Yunnan Provincial Key Laboratory for Zoonosis Control and Prevention, Dali University) ;
  • Xiao-Bin Huang (Institute of Pathogens and Vectors, Yunnan Provincial Key Laboratory for Zoonosis Control and Prevention, Dali University) ;
  • Dao-Chao Jin (Institute of Entomology, Guizhou University)
  • 투고 : 2022.04.19
  • 심사 : 2023.06.22
  • 발행 : 2023.08.31
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초록

Chigger mites are the vector of scrub typhus. This study estimates the infestation status and ecological characteristics of chiggers on the chestnut white-bellied rat Niviventer fulvescens in Southwest China between 2001 and 2019. Chiggers were identified under the microscope, and infestation indices were calculated. The Preston's log-normal model was used to fit the curve of species abundance distribution. A total of 6,557 chiggers were collected in 136 of 342 N. fulvescens rats, showing high overall infestation indices (prevalence=39.8%, mean abundance=19.2, mean intensity=48.2) and high species diversity (S=100, H'=3.0). Leptotrombidium cangjiangense, Neotrombicula japonica, and Ascoschoengastia sifanga were the three dominant chigger species (constituent ratio=42.9%; 2,736/6,384) and exhibited an aggregated distribution among different rat individuals. We identified 100 chigger species, with 3 of them (Leptotrombidium scutellare, Leptotrombidium wenense, and Leptotrombidium deliense) as the main vectors of scrub typhus in China and nine species as potential vectors of this disease. Disease vector occurrence on N. fulvescens may increase the risk of spreading scrub typhus from rats to humans. Chigger infestation on N. fulvescens varied significantly in different environments. The species abundance distribution showed a log-normal distribution pattern. The estimated number of chigger species on N. fulvescens was 126 species.

키워드

과제정보

We are very grateful to the following people who contributed to our investigation both in the field and laboratory: Yun-Ji Zou, Zong-Yang Luo, Qiao-Hua Wang, Yong Zhang, CongHua Gao, Nan Zhao, Jian-Chang He, Guo-Li Li, Yan-Liu Li, Xue-Song He, Chang-Ji Pu, JiWei Guo, De-Cai Ouyang, Shuang-Lin Wang, Xing-Shun Zhu, He Sha, Long Zhou, A-Si Di, Cheng-Wei He, some colleagues, and college students. We are also grateful to the Expert work station for Dao-Chao Jin in Dali Prefecture. This work was supported by the Major Science and Technique Programs from Yunnan Province (Grant No. 202102AA310055-X) and the National Natural Science Foundation of China (No. 82160400).

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