title: Effects of temperature on the larval development of Angiostrongylus cantonensis in the intermediate host, Biomphalaria glabrata.
abstract: The effects of temperature on the larval development of Angiostrongylus cantonensis in Biomphalaria glabrata were studied under controlled conditions. When B. glabrata were maintained at different, constant temperatures, the first-stage larvae developed to third-stage larvae between 20 degrees and 31 degrees C. The velocity of development to the third-stage in the snail depended on the relationship, Y = -0.1281 + 0.0081 X (Y velocity of development; X rearing temperature). The "threshold of development" was 15.8 degrees C and the thermal constant 123 degree-days. It is concluded that there might be a possibility of A. cantonensis spreading to temperate regions in the world, if, in addition to the temperature, other factors allowed the completion of the life cycle of this worm.
mesh_terms: D000801:Angiostrongylus / Q000254:growth & development*; D000818:Animals; D001700:Biomphalaria / Q000469:parasitology*; D007814:Larva; D008681:Metastrongyloidea / Q000254:growth & development*; D013696:Temperature; D013997:Time Factors