Hideyo Noguchi Japanese microbiologist who discovered the cause of syphillis and devised the Wasserman skin test for it. He also did research on rabies, trachoma, bubonic plague and yellow fever.
Hideyo Noguchi (野口 英世 Noguchi Hideyo?, November 24, 1876 – May 21, 1928), also known as Seisaku Noguchi (野口 清作 Noguchi Seisaku?), was a prominent Japanese bacteriologist who discovered the agent of syphilis as the cause of progressive paralytic disease in 1911.
Japanese characteristics and their various diseases and treatments by Hideyo Noguchi : http://www.budwin.net/medicology/html/book08-11.html