摘要: Halberstaedter (1914) found that T. brucei treated with radium (Beta-rays) lost their infectivity although they remained viable as evidenced by continued motility. Bruynoghe (1926) confirmed these results using radium. Patel (1936) irradiated cultures of X-rays and ultra-violet light the organisms resistant to former but rapidly destroyed latter. (1938) exposed gambiense varying dosages it took 600,000r kill could be rendered non-infectious for mice doses 12,000r. The present paper reports experiments exposing cruzi X-rays.