Boissier Jérôme, Rivera Ezequiel R, Moné Hélène
Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, UMR 5555 CNRS-UP, Université de Perpignan, 52 Avenue Paul Alduy, 66860 Perpignan Cedex, France.
J Parasitol. 2003 Jun;89(3):429-33. doi: 10.1645/0022-3395(2003)089[0429:ABOTSB]2.0.CO;2.
In this comparative behavioral study, the effect of infection with Schistosoma mansoni on its snail intermediate host Biomphalaria glabrata was investigated. Three groups of snails were compared for their activity: (1) uninfected, (2) infected with male parasites, and (3) infected with female parasites. In solitary movement trials, uninfected snails traveled greater distances at faster rates, explored more surface area, and had shorter rest periods than snails infected with either male or female schistosomes. In Y-maze experiments designed to determine attraction, the uninfected snails more often and more quickly moved toward other snails than the infected individuals. Snails from all 3 groups were more attracted to infected individuals than to uninfected ones. There was no difference in attraction toward snails infected with male or female parasites. These experiments provide evidence that behavioral alterations as a result of infection may lead to aggregation of infected snails in the field. We propose that such an effect may result in enhanced parasite transmission.
在这项比较行为学研究中，调查了曼氏血吸虫感染对其蜗牛中间宿主光滑双脐螺的影响。比较了三组蜗牛的活动情况：（1）未感染组，（2）感染雄虫组，以及（3）感染雌虫组。在单独移动试验中，未感染的蜗牛比感染雄虫或雌虫的蜗牛移动距离更远、速度更快，探索的表面积更大，休息时间更短。在旨在确定吸引力的Y迷宫实验中，未感染的蜗牛比感染的蜗牛更频繁、更快地向其他蜗牛移动。三组蜗牛都对感染的个体比对未感染的个体更有吸引力。对感染雄虫或雌虫的蜗牛的吸引力没有差异。这些实验提供了证据，表明感染导致的行为改变可能会导致感染的蜗牛在野外聚集。我们认为这种效应可能会导致寄生虫传播增强。
