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尽管已知扁形动物门的几种主要寄生扁虫的许多形态特征,但其种群内和种群间的确切关系仍有争议。近几年,从核糖体RNA(rRNA)基因复合物得到的核苷酸序列数据在确定扁形动物门之间的系统和种系发生关系,在补充甚至取代传统的形态学、生理学和生物化学信息上发挥越来越重要的作用。根据卵的形态学、地理分布和中间宿主特异性,裂体属的19种血吸虫传统上分为四个种群即曼氏、埃及、日本和印度血吸虫种群,其中前三个种群为人体重要血吸虫。
Although many morphological features of several major parasitic flatworms in the flat phylum are known, the precise relationship within and between populations remains controversial. In recent years, nucleotide sequence data obtained from ribosomal RNA (rRNA) gene complexes have been used to determine the phylogeneties and phylogenetic relationships among flat animals and to supplement or even replace traditional morphological, physiological and biochemical information Play an increasingly important role. According to the morphological, geographical distribution and intermediate host specificity of eggs, the 19 schistosomes of the genus Rift are traditionally divided into four groups, namely Mann’s, Egypt, Japan and India, and the first three are important human schistosomes.