 This small snail is also parasitized by several species of ciliates.It is the main host for the ciliate "Trichodina baltica"; the snails are usually 100% infected in the mantle cavity Another ciliate found in the mantle cavity is a species of "Scyphidia".Two other parasitic ciliate species found in this snail are "Protospira mazurica", and "Hypocomella quatuor".