Attwood S W, Kitikoon V, Southgate V R
Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
J Helminthol. 1997 Sep;71(3):183-7. doi: 10.1017/s0022149x00015893.
All three strains of Neotricula aperta (Gastropoda: Pomatiopsidae) sampled from populations in northeast Thailand were found to be compatible with a Schistosoma mekongi isolate from Kratie District, eastern Cambodia. The infection rates were: 3.0%, alpha-strain; 6.0%, beta-strain, and 20.5%, gamma-strain. The greater infectivity to the gamma-strain, over both the alpha- and beta-strains, was statistically significant. Comparisons of infectivity patterns for the Kratie isolate, with those described in earlier studies using S. mekongi isolates from southern Laos, revealed differences among the strains. The gamma-strain of N. aperta is responsible for endemic transmission of human schistosomiasis in southern Laos and at Kratie. Consequently, the findings of this study are of use in the prediction of changes in the distribution of Mekong schistosomiasis, particularly its introduction to northeast Thailand from the neighbouring countries, Cambodia and Laos.
从泰国东北部种群中采集的三种孔状新拟钉螺（腹足纲：拟钉螺科）均被发现与柬埔寨东部桔井省的一株湄公血吸虫分离株具有相容性。感染率分别为：α株3.0%；β株6.0%；γ株20.5%。γ株的感染力高于α株和β株，差异具有统计学意义。将桔井分离株的感染模式与早期使用老挝南部湄公血吸虫分离株的研究中所描述的模式进行比较，发现各菌株之间存在差异。孔状新拟钉螺γ株是老挝南部和桔井地区人类血吸虫病地方性传播的原因。因此，本研究结果有助于预测湄公血吸虫病分布的变化，特别是其从邻国柬埔寨和老挝传入泰国东北部的情况。
