Muñoz-Antoli Carla, Trelis María, Gozalbo Mónica, Toledo Rafael, Haberl Bernhard, Esteban José-Guillermo
Departamento de Parasitología, Facultad de Farmacia, Universidad de Valencia, Vicente Andrés Estellés s/n, 46100 Burjassot-Valencia, Spain.
Parasitol Res. 2003 Nov;91(5):353-6. doi: 10.1007/s00436-003-0968-5. Epub 2003 Sep 16.
In order to determine whether the miracidia of Euparyphium albuferensis and Echinostoma friedi are sensitive to their host snail (HS) and capable of discriminating between HS and non-host snails (NHS), or whether these NHS can interfere and thus reduce the infection rates (decoy effect), a total of three experiments were conducted with HS, NHS and snail-conditioned water (SCW). Gyraulus chinensis is the HS for E. albuferensis miracidia, while Physa acuta, Radix peregra and Lymnaea fuscus are considered NHS. For E. friedi miracidia R. peregra, G. chinensis and L. fuscus are the HS, while P. acuta is the NHS. The NHS R. peregra produces the greatest decoy effect on Euparyphium albuferensis miracidia, while R. peregra, as the HS of Echinostoma friedi miracidia, is always subject to a NHS decoy effect. However, an increase in E. friedi miracidia infectivity is observed in its HS G. chinensis, in the presence of SCW of P. acuta. These experimental results might explain the low prevalence of snails infected with E. albuferensis miracidia in their natural habitat.
为了确定阿尔布费拉真缘吸虫和弗里德棘口吸虫的毛蚴是否对其宿主螺敏感，能否区分宿主螺和非宿主螺，或者这些非宿主螺是否会产生干扰从而降低感染率（诱饵效应），共进行了三项使用宿主螺、非宿主螺和螺 conditioned 水（SCW）的实验。中华圆扁螺是阿尔布费拉真缘吸虫毛蚴的宿主螺，而尖膀胱螺、游荡萝卜螺和褐云玛瑙螺被视为非宿主螺。对于弗里德棘口吸虫毛蚴，游荡萝卜螺、中华圆扁螺和褐云玛瑙螺是宿主螺，而尖膀胱螺是非宿主螺。非宿主螺游荡萝卜螺对阿尔布费拉真缘吸虫毛蚴产生的诱饵效应最大，而作为弗里德棘口吸虫毛蚴宿主螺的游荡萝卜螺，始终受到非宿主螺的诱饵效应影响。然而，在其宿主螺中华圆扁螺存在尖膀胱螺的 SCW 时，观察到弗里德棘口吸虫毛蚴的感染性增加。这些实验结果可能解释了在自然栖息地中感染阿尔布费拉真缘吸虫毛蚴的螺类患病率较低的原因。
