Geographical distribution and epidemiologic factors of chigger mites on apodemus agrarius during autumn in korea

In Yong Lee, Jae Won Lim, Jang Hoon Seo, Heung Chul Kim, Ku Jae Lee, Tai Soon Yong, Won Ja Lee, Jae Ran Yu, Seobo Sim

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2 Citations (Scopus)


A nationwide survey of chigger mites causing scrub typhus and an investigation of epidemiologic factors for chigger mites was conducted at 16 localities in 8 provinces in Korea during autumn 2009, 2012, and 2013. A total of 233 Apodemus agrarius were captured, and all were infested with chigger mites. The chigger index was highest in Chun-gcheongbuk-do in 2009 (358.3) and 2012 (290.1) and Chungcheongnam-do in 2013 (294.4). The predominant chigger mite species was Leptotrombidium pallidum in the northern and central parts and L. scutellare in the southern and west-ern parts, Korea. L. pallidum was not found in Jellanam-do and Gyeongsangnam-do and the distribution of L. scutellare had been expanded in the northern parts of Korea. The chigger index of L. pallidum was positively correlated with tem-perature and negatively correlated with humidity. The incidence of scrub typhus is dependent on L. scutellare index. These findings could be helpful to monitor the distribution of chigger mites and to develop a preventive measures for scrub typhus in Korea.

Original languageEnglish
Pages (from-to)473-479
Number of pages7
JournalKorean Journal of Parasitology
Issue number5
Publication statusPublished - 2021 Oct

Bibliographical note

Funding Information:
This study was supported by research grant from National Institute of Biological Resources (NIBR), Ministry of Environment, Korea.

Publisher Copyright:
© 2021, Korean Society for Parasitology and Tropical Medicine. All rights reserved.

All Science Journal Classification (ASJC) codes

  • Parasitology
  • Infectious Diseases


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