Fig. 4From: First intermediate hosts of Paragonimus spp. in Vietnam and identification of intramolluscan stages of different Paragonimus speciesHabitats of snails in Quang Tri Province. a A rocky main stream with fast water flow. b Sulcospira quangtriensis on a stone of the main stream. c A tributary with slow water flow where Sulcospira and triculine snails liveBack to article page