He reported it at the 3rd International Leprosy Congress in 1923 but received little attention .
However , the original idea was to distinguish leprosy patients and persons with normal blood , and he invented a skin test using the killed bacilli , the original Mitsuda reaction .
Mitsuda reported it at the 3rd International Leprosy Congress in 1923 but received little attention .
However , the original idea was to distinguish leprosy patients and persons with normal blood , and he invented a skin test using the killed bacilli , the original Mitsuda reaction .