Sanprick Amornrat, Yooyen Thanapon, Rodkvamtook Wuttikon
Department of Biology, Faculty of Science, Thaksin University, Pa Phayom District, Phatthalung 93210, Thailand.
Armed Forces Research Institute of Medical Science, Royal Thai Army, Bangkok 10400, Thailand.
Korean J Parasitol. 2019 Apr;57(2):167-173. doi: 10.3347/kjp.2019.57.2.167. Epub 2019 Apr 30.
Rickettsial infections (Rickettsioses) are the causes of acute fever found in Thailand. It is classified as acute febrile illnesses transmitted by bloodsucking arthropod vectors (tick, flea, and chigger). This research investigated pathogens of scrub typhus in vectors from Bangkaew District, Phatthalung Province. A total of 303 pools of vector samples were ticks (Rhipicephalus sanguineus, R. microplus, and Haemaphysalis sp.), fleas (Ctenocephalides felis orientis, C. f. felis, and C. canis), and chiggers (Leptotrombidium deliense, Aschoschoengastia indica, Blankaartia acuscutellaris and Walchia disparunguis pingue) collected from reservoir hosts (dogs and rodents). The 17 and 56 kDa gene of Rickettsia causing scrub typhus were found in 29% of ticks and 98% of flea. DNA sequence analysis reveeled the detected strains were R. asembonensis and Rickettsia sp. cf1 and 5.The chiggers, 1%, were infected with Rickettsia strain TA763, a pathogen of scrub typhus.
立克次氏体感染(立克次氏体病)是泰国急性发热的病因。它被归类为由吸血节肢动物媒介(蜱、跳蚤和恙螨)传播的急性发热性疾病。本研究调查了北大年府邦考区媒介中恙虫病的病原体。总共303组媒介样本包括从储存宿主(狗和啮齿动物)采集的蜱(血红扇头蜱、微小牛蜱和血蜱属)、跳蚤(东方猫栉首蚤指名亚种、猫栉首蚤指名亚种和犬栉首蚤)和恙螨(地里纤恙螨、印度无前恙螨、阿库恙螨和苍白沃尔恙螨)。在29%的蜱和98%的跳蚤中发现了引起恙虫病的立克次氏体的17和56 kDa基因。DNA序列分析显示检测到的菌株是阿森博立克次氏体和立克次氏体cf1和5型。1%的恙螨感染了恙虫病病原体立克次氏体TA763菌株。