Abstract
Sarcocystis neurona and Sarcocystis falcatula are very similar species that use marsupials of the genus Didelphis as definitive hosts. These mammals can participate as definitive hosts not only for these two parasites, but for other Sarcocystis such as Sarcocystis speeri and Sarcocystis lindsayi. Sarcocystis shed by opossums (except for S. neurona) can cause disease in a great variety of …