Paraense W L, Corrêa L R
J Parasitol. 1978 Oct;64(5):822-6.
Experiments to determine the susceptibility of Biomphalaria tenagophila from 20 localities over the species range exposed to a strain of Schistosoma mansoni showed widely varying infection rates, from 0% to 91.5%, this latter having been observed in a sample from an area where the natural infection rate of B. tenagophila has been the highest in the country. Comparison with similar studies involving B. glabrata seems to indicate that a process of adaptation between S. mansoni and B. tenagophila is evolving, the 2 organisms having reached a high degree of compatibility in a few areas. The present results point to the possibility of expansion of schistosomiasis to a wide South American area where B. tenagophila occurs.
为确定来自该物种分布范围内20个地点的嗜气管双脐螺对曼氏血吸虫某一菌株的易感性而开展的实验显示，感染率差异很大，从0%到91.5%不等，后者是在该国嗜气管双脐螺自然感染率最高地区的一个样本中观察到的。与涉及光滑双脐螺的类似研究进行比较似乎表明，曼氏血吸虫与嗜气管双脐螺之间的适应过程正在演变，这两种生物在一些地区已达到高度的兼容性。目前的结果表明，血吸虫病有可能扩展到嗜气管双脐螺存在的南美广大地区。
