THE OCCURRENCE OF LYMNAEA (PSEUDOSUCCINEA) COLUMELLA, AN INTERMEDIATE HOST OF FASCIOLA HEPATICA, IN AUSTRALIA

An established population of the eastern North American freshwater snail Lymnaea (Pseudosuccinea) columella Say is reported from Middle Creek and Centennial Park, Sydney. This species is an important intermediate host of the liver fluke (Fasciola hepatica Linné) and its introduction and spread in New Zealand has resulted in an increase in the liver fluke problem in New Zealand.