n, pl  -oses   :  LEPROSY
 
Han•sen, Gerhard Henrik Armauer (1841-1912), Norwegian physician. Hansen devoted his professional life to the study of leprosy. He investigated its epidemiology, etiology, prevention, and institutional management. In 1873 he discovered the bacillus (now known as Hansen's bacillus) that causes leprosy.
 
 
 
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