de Souza C P, Jannotti-Passos L K, Ferreira S S, Vieira I B
Centro de Pesquisas René Rachou, FIOCRUZ, Belo Horizonte, MG. Brasil.
Rev Inst Med Trop Sao Paulo. 1996 Mar-Apr;38(2):141-5. doi: 10.1590/s0036-46651996000200009.
The ratios of male to female worms of Schistosoma mansoni were determined in mice infected with cercariae from LE, SJ and AL strains shed by mollusc hosts of the parasite in Brazil. The sex ratios of worms in the animals were similar with cercariae from Biomphalaria glabrata and B. tenagophila varying from 1.1:1 to 1.6:1 with LE and AL strains and 1:1.1 with SJ. In the animals infected with cercariae from B. straminea the ratio of male to female worms was similar to those obtained using cercariae shed from the other two species of molluscs, 1.5:1 with LE strain. Inoculations by AL and SJ cercariae resulted in sex ratios of 3.1:1 and 6:1 respectively. The normal sex ratios of worms established in Brazil in animals inoculated with cercariae from B. glabrata and B. tenagophila is from 1:1 to 2:1. The higher number of male worms that developed from cercariae of the AL and SJ strains obtained from B. straminea indicate a lower compatibility of the snail concerning these strains of S. mansoni.
在巴西，用来自寄生虫软体动物宿主所释放的LE、SJ和AL株尾蚴感染小鼠，测定曼氏血吸虫雄虫与雌虫的比例。感染光滑双脐螺和嗜气管双脐螺尾蚴的动物体内虫体的性别比例相似，LE和AL株的比例在1.1:1至1.6:1之间，SJ株为1:1.1。在感染稻草双脐螺尾蚴的动物中，雄虫与雌虫的比例与使用其他两种软体动物释放的尾蚴所获得的比例相似，LE株为1.5:1。用AL和SJ尾蚴接种导致性别比例分别为3.1:1和6:1。在巴西，用光滑双脐螺和嗜气管双脐螺尾蚴接种的动物体内所建立的虫体正常性别比例为1:1至2:1。从稻草双脐螺获得的AL和SJ株尾蚴发育出的雄虫数量较多，表明该蜗牛与这些曼氏血吸虫株的相容性较低。
