Serosurveillance of scrub typhus in small mammals collected from military training sites near the DMZ, northern Gyeonggi-do, Korea, and analysis of the relative abundance of chiggers from mammals examined

Heung Chul Kim, In Yong Lee, Sung Tae Chong, Allen L. Richards, Se Hun Gu, Jin Won Song, John S. Lee, Terry A. Klein

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Comprehensive quarterly serosurveillance on scrub typhus in small mammals collected from military training sites located near the Demilitarized Zone (DMZ), northern Gyeonggi-do (Province), ROK was conducted to determine the potential rodent-borne and associated ectoparasite disease risks to military personnel. A total of 1,196 rodents and insec- tivores representing 8 species, Apodemus agrarius (87.3%, n = 1,044), Mus musculus (5.4%, n = 65), Crocidura lasiura (3.3%, n = 40), Microtus fortis (2.6%, n = 31), Micromys minutus (0.3%, n = 4), Tscherskia triton (0.3%, n = 4), Rattus norvegicus (0.3%, n = 4), and Myodes regulus (0.3%, n = 4) were assayed for the presence of antibodies to Orientia tsut- sugamushi. O. tsutsugamushi antibodies were detected in 6 of 8 species and seroprevalence determined; A. agrarius (45.6%), M. musculus (23.1%), M. fortis (48.4%), M. minutus (50.0%), T. triton (50.0%), and R. norvegicus (25.0%). A total of 31,184 chigger mites collected from 508 rodents and insectivores were slide-mounted and 10 species belonging to 4 genera were identified. Leptotrombidium pallidum (53.4%) was the most frequently collected, followed by L. palpale (15.7%), Neotrombicula tamiyai (14.3%), L. orientale (10.7%), L. zetum (3.1%), Walchia fragilis (2.1%), and L. gemiticu- lum (0.8%), while the remaining 3 species, L. subintermedium, N. gardellai, and Euschoengastia koreaensis were rarely observed (prevalence < 10%). In contrast to previous surveys, higher chigger indices of the primary scrub typhus vectors, L. pallidum (165.4), L. orientale (45.0), and L. palpale (21.4), were observed during the spring season.

Original languageEnglish
Pages (from-to)237-243
Number of pages7
JournalKorean Journal of Parasitology
Volume48
Issue number3
DOIs
Publication statusPublished - 2010 Sep

Keywords

  • Apodemus agrarius
  • Chigger
  • Crocidura lasiura
  • Leptotrombidium
  • Mus musculus
  • Scrub typhus

ASJC Scopus subject areas

  • Parasitology
  • Infectious Diseases

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