Who discovered Leptospirosis?   *

Leptospirosis was first observed by Adolf Weil in 1886 when he reported an "acute infectious disease with enlargement of spleen, jaundice, and nephritis". However, the leptospira bacteria that cause the disease were not discovered until much later. In the early 20th century, Inada and Ito first identified Leptospira interrogans in Japan.