Taxa sampled, collecting sites (populations) and dates of field collection for samples used during the present study.

Life cycle stage sampled: L, from a laboratory line (with year line established); M, sampled from a new infection using cercariae from naturally infected snails; N, natural infection, i.e. sampled from a natural infection in field trapped definitive hosts. Numbers of infected snails or field trapped rodents (as applicable) used are given in parentheses under ‘Isolate details’.