“…This is a cosmopolitan nematode parasite of rodents (Prokopic & Genov 1974, Zagicek 1987, Torres et al 2001). However, it has also been reported in marsupials and carnivores (Baylis 1927, Smales 1995, Feliu et al 1991, Torres et al 1996, 1998, 2001. Smales (1995) M. muris has an indirect life cycle, which requires insects (mainly coleopterans) as intermediate hosts (Quentin 1970, Anderson 1992, Rojas & Digiani 2003.…”