This species, which recently is found to parasitize more and more often humans that live in Malaysia or stayed for a longer period in Malaysia (e.g., on the island Tioman), leads to a typical Sarcocystosis. This is characterized by a two-phase disease. After an initial fever later follow prolonged myalgia, eosinophilia, and CK increase. The initial treatment with cotrimoxazole shortened the period of symptoms to about 20 days, while a later treatment stopped symptoms only after 3 months. Most common symptoms are weakness, fever (38–40 °C), headache, muscle and neck pain, sweating, feeling sick, and diarrhea. However, humans do not seem to be the typical intermediate host (they are probably monkeys), while the final host is still unknown.