Maeda Hiroki, Hatta Takeshi, Tsubokawa Daigo, Mikami Fusako, Nishimaki Toshiyuki, Nakamura Takeshi, Matsubayashi Makoto, Ogawa Motoyuki, da Costa Clarissa Prazeres, Tsuji Naotoshi
Department of Parasitology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan.
Department of Anatomy, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan.
Parasitol Int. 2018 Oct;67(5):609-611. doi: 10.1016/j.parint.2018.06.003. Epub 2018 Jun 9.
Parasite-induced behavioral changes in their hosts favor to complete the lifecycle of parasites. Schistosome infection is also known to cause physiological changes in infected freshwater snail intermediate hosts. Here, we report, a novel phenomenon in which Schistosoma mansoni, a highly debilitating worm affecting millions of people worldwide, alters the phototropic behavior of Biomphalaria glabrata, the vector snail. S. mansoni-infection enhanced positive phototropism of vector snails and infected snails spent significantly more time in light. Possibly, these behavioral changes help the parasite to be released efficiently from the infected intermediate hosts, and to infect mammalian hosts.
寄生虫诱导宿主行为变化有利于其完成生命周期。已知血吸虫感染也会导致受感染的淡水蜗牛中间宿主发生生理变化。在此，我们报告一种新现象，即曼氏血吸虫这种严重危害全球数百万人健康的寄生虫，会改变中间宿主光滑双脐螺的趋光行为。曼氏血吸虫感染增强了中间宿主蜗牛的正向趋光性，受感染的蜗牛在光亮处停留的时间显著更长。这些行为变化可能有助于寄生虫有效地从受感染的中间宿主中释放出来，并感染哺乳动物宿主。
