迄今已知6个属11种血吸虫的染色体数。其范围自2n=14至2n=18,其中9种血吸虫的双倍体数为16。本研究证实了巨毕属的Gigantobilharzia huronensis的染色体数,并首次提供了牛血吸虫(Schistosoma bo-vis)、间插血吸虫(S.intercalatum)和梅氏血吸虫(S.mattheei)的染色体数。作者采用压片法分别以成虫睾丸和软体动物内的虫体为材料观察减数分裂和有丝分 To date, the chromosome numbers of sixteen genera of 11 species of schistosomes have been known. Its range from 2n = 14 to 2n = 18, of which 9 kinds of schistosome diploid number 16. This study confirms the chromosome number of the giant Gigantobilharzia huronensis and provides, for the first time, the chromosome numbers of Schistosoma bo-vis, S. intercalatum and S.matheei. The authors used the tablet method to observe the adults and molluscs in the testis and mollusk parasites for the observation of meiosis and silk