Ree H I, Lee I Y, Jeon S H, Yoshida Y
Department of Parasitology, College of Medicine, Yonsei University, Seoul, Korea.
Korean J Parasitol. 1997 Sep;35(3):171-9. doi: 10.3347/kjp.1997.35.3.171.
Studies of geographical distributions and relative population densities of the vector mites of tsutsugamushi disease were carried out in October 1996 at 12 locations of the mid-south inland of the Korean peninsula, where chigger mites have been never studied. Of 177 field rodents and insectivores collected, 154 (87.0%) were Apodemus agrarius. Total 25,707 chigger mites were collected and 14 species were identified, of which Leptotrombidium pallidum was predominant (79.8%) and L. palpale the next (8.9%). L. pallidum, the vector species, was widely distributed in all study areas, showing the highest density at Cho-o 2-dong, Sangju-si (chigger index 201.8), and the lowest at Tanwol-dong. Chungju-si (chigger index 40.7). The other vector species, L. scutellare was found only at the southern part of the study area such as Yobae and Mipyong, Kumrunggun and Unsu, Kimchon-si. The northernmost areas of the L. scutellare distribution were coincided with the areas where anual mean air temperature is above 10.0 C. Among 157 A. agrarius sera tested, 48.3% was Karp, 1.7% Gilliam and 3.3% Kuroki. The rest of the sera were not able to determine the sero-type because of the cross antigen-antibody reactions among the tested sero-types.
1996年10月，在朝鲜半岛中南内陆地区12个从未对恙螨进行过研究的地点，开展了恙虫病媒介螨的地理分布和相对种群密度研究。在采集的177只野生啮齿动物和食虫动物中，154只（87.0%）为黑线姬鼠。共采集到25707只恙螨，鉴定出14个种类，其中苍白纤恙螨占主导（79.8%），其次是触须纤恙螨（8.9%）。作为媒介种类的苍白纤恙螨在所有研究区域广泛分布，在尚州市草奥2洞密度最高（恙螨指数201.8），在忠州市炭院里最低（恙螨指数40.7）。另一种媒介种类小板纤恙螨仅在研究区域南部如梁坪、美坪、金泉郡温水里和麟蹄郡麟蹄面发现。小板纤恙螨分布的最北端与年平均气温高于10.0℃的区域一致。在检测的157份黑线姬鼠血清中，48.3%为Karp型，1.7%为Gilliam型，3.3%为Kuroki型。其余血清因检测血清型之间的交叉抗原抗体反应而无法确定血清型。
