78 以實驗室飼養之未被感染的錐鼻蟲（reduviid bugs）吸食病人的血液作動物接種試驗（xenodiagnosis），常用來診斷下列何種感染症？

瘧疾（malaria） 非洲睡眠病（sleeping sickness）

恰加斯氏病（Chagas’ disease） 弓蟲症（toxoplasmosis）

CHAGAS!

The presence of T. cruzi is diagnostic of Chagas disease. It can be detected by microscopic examination of fresh anticoagulated blood, or its buffy coat, for motile parasites; or by preparation of thin and thick blood smears stained with Giemsa, for direct visualization of parasites. Microscopically, T. cruzi can be confused with Trypanosoma rangeli, which is not known to be pathogenic in humans. Isolation of T. cruzi can occur by inoculation into mice, by culture in specialized media (e.g., NNN, LIT); and by xenodiagnosis,^[16] where uninfected Reduviidae bugs are fed on the patient's blood, and their gut contents examined for parasites.^[2]