In 1960, the cyst wall of tissue cysts was shown to dissolve in the proteolytic enzymes found in the stomach, releasing infectious bradyzoites into the stomach (and subsequently into the intestine).
En 1960, observouse que a parede do quiste dos quistes dos tecidos era disolta por encimas proteolíticos que se encontran no estómago, o que facía que liberasen os bradizoítos infecciosos no estómago (e despois no intestino).