[Discovery of the first intermediate host of Paragonimus heterotremus].

Second generation rediae and cercariae of Paragonimus heterotremus were discovered from Tricula sp. collected from Paragonimus heterotremus endemic area, Napo County, Guangxi Zhuan Autonomous Region. The infection rate of the snails was 0.11% (4/3 530). The experimental infection of Tricula sp. collected from Wuming non-endemic area was done with P. heterotremus miracidia. The second generation rediae and cercariae of P. heterotemus developed later in the experimentally infected snails were similar to those in naturally infected snails. Thus far Tricula sp. from Napo County was confirmed to be the first intermediate host of P. heterotemus in nature (Figs. 1-6).