| Home | E-Submission | Sitemap | Contact us |  
Korean J Parasitol > Volume 33(1):1995 > Article

Original Article
Korean J Parasitol. 1995 Mar;33(1):27-36. English.
Published online Mar 20, 1995.  http://dx.doi.org/10.3347/kjp.1995.33.1.27
Copyright © 1995 by The Korean Society for Parasitology
Comparative epidemiological studies on vector/reservoir animals of tsutsugamushi disease between high and low endemic areas in Korea
Han-Il Ree,*1Min-Kee Cho,2In-Yong Lee,1 and Soung-Hoo Jeon1
1Institute of Tropical Medicine, Yonsei University, Seoul 120-752, Korea.
2Department of Microbiology, College of Medicine, Hallym University, Chunchon 200-702, Korea.
Received December 01, 1994; Accepted January 04, 1995.


Comparative epidemiological studies on vector reservoir animals of tsutsugamushi disease were carried out in between south coast (the highest endemic) areas and east coast (low endemic) areas in October 1993. Fauna of field rodents and their population densities were not different between two areas. Antibody positive rate of Apodemus agrarius sera was higher in east coast (43.2% in south coast and 63.6% in east coast). High correlation (r = 0.87) was shown between antibody positive rate of A. agrarius sera and population density of the vector mites (Leptotrombidium scutellare and L. pallidum). L. scutellare was predominant in south coast, showing 110.6 chigger index (74.9% of the total chiggers), whereas L. pallidum was predominant in east coast, showing 126.3 chigger index (60.4% of the total). As higher population density of L. scutellare was found in south coast where the prevalence rate of tsutsugamushi disease is the highest, it is believed that L. scutellare is more important vector species than L. pallidum, which may result from more frequent vector-human contact.


Fig. 1
Study sites along south and east coast of the Korean Peninsula.

Fig. 2
Correlation between chigger indices of the vectors and antibody positive rate of Apodemus agrarius sera in October 1993


Table 1
Field rodent collections by using 98 Sherman traps at each study area in October 1993

Table 2
Chigger index of each species of the field rodents for assessing host preferences of chigger mites

Table 3
Species and total numbers of the chigger mites collected in study areas

Table 4
Comparative density of chigger mites (chigger index) on Apodemus agrarius

Table 5
Antibody positive rate of Apodemus agrarius sera against R. tsutsugamushi in October 1993

Table 6
Prevalence rate of tsutsugamushi disease by province in Korea in 1991 and 1992

Table 7
Prevalence rate of tsutsugamushi disease along east and south coastal areas of Korea in 1991 and 1992

2. Chang WH, et al. J Korean Soc Microbiol 1992;27(5):435–441.
3. Chang WH, et al. J Korean Soc Microbiol 1991;26(3):273–277.
4. Chang WH, et al. J Korean Soc Microbiol 1990;25(3):227–235.
5. Chang WH, et al. J Korean Soc Microbiol 1989;24(2):185–195.
7. Jackson EB, et al. Am J Hyg 1957;66:309–320.
9. Lee HW, et al. J Korean Soc virol 1990;20(1):115–126.
10. Lee IY, et al. Korean J Zool 1993;36(3):408–415.
11. Park BC, et al. J Cathol Med Coll 1991;44(3):841–850.
12. Ree HI. Korean J Syst Zool 1991;6(1):57–70.
13. Ree HI, Lee IY, Cho MK. Study on vector mites of tsutsugamushi disease in Cheju Island, Korea. Korean J Parasitol 1992;30(4):341–348.
15. Ree HI, et al. Korean J Zool 1991;34:257–264.
16. Ree HI, Lee IY, Cho MK. Determination of the vector species of tsutsugamushi disease in Korea. Korean J Parasitol 1991;29(1):87–92.
18. Tamura A, Urakami H, Tsuruhara T. Purification of Rickettsia tsutsugamushi by Percoll density gradient centrifugation. Microbiol Immunol 1982;26(4):321–328.
Editorial Office
Department of Molecular Parasitology, Samsung Medical Center, School of Medicine, Sungkyunkwan University,
2066 Seobu-ro, Jangan-gu, Suwon 16419, Gyeonggi-do, Korea.
Tel: +82-31-299-6251   FAX: +82-1-299-6269   E-mail: kjp.editor@gmail.com
About |  Browse Articles |  Current Issue |  For Authors and Reviewers
Copyright © 2022 by The Korean Society for Parasitology and Tropical Medicine.     Developed in M2PI