Laoprom Nonglak, Saijuntha Weerachai, Sithithaworn Paiboon, Wongkham Sopit, Laha Thewarach, Ando Katsuhiko, Andrews Ross H, Petney Trevor N
Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Liver Fluke and Cholangiocarcinoma Research Center, Khon Kaen 40002, Thailand.
J Parasitol. 2009 Dec;95(6):1307-13. doi: 10.1645/GE-2116.1.
Previous molecular genetic analyses indicate that Opisthorchis viverrini is a complex of at least 2 cryptic species in Thailand and the Lao People's Democratic Republic (PDR). Opisthorchis viverrini sensu lato (s.l.) populations can be divided into 6 genetic groups, which correlate with 5 different river wetlands systems. The present study examines the infectivity, growth, fecundity, and body size of O. viverrini s.l. isolates from these systems. Worm recovery was lowest in the Songkhram River, which differed significantly from all other wetland systems. In addition, the Chi River and Nam Ngum River populations also differed significantly. A similar pattern was found for fecundity. These results support the genetic/molecular data indicating a subdivision of O. viverrini populations on the basis of watershed and that propose the existence of cryptic species in Thailand and the Lao PDR.
先前的分子遗传学分析表明，在泰国和老挝人民民主共和国，麝猫后睾吸虫是至少2个隐存种的复合体。广义的麝猫后睾吸虫种群可分为6个遗传组，这与5个不同的河流湿地系统相关。本研究检测了来自这些系统的广义麝猫后睾吸虫分离株的感染力、生长、繁殖力和虫体大小。在宋卡姆河中虫体回收率最低，与所有其他湿地系统有显著差异。此外，奇河和南俄河的种群也有显著差异。在繁殖力方面也发现了类似的模式。这些结果支持了遗传/分子数据，表明麝猫后睾吸虫种群在流域基础上存在细分，并提示在泰国和老挝人民民主共和国存在隐存种。
