Open Your Heart / And Catch My Disease

I typed in "composers who" and google auto-completed "died of syphilis." So I went with it.

Niccolò Paganini (1782–1840)
Franz Schubert (1797–1828)
Gaetano Donizetti (1797–1848)
Bedřich Smetana (1824–1884)
Hugo Wolf (1860–1903)
Edward MacDowell (1860-1908)
Frederick Delius (1862–1934)
Scott Joplin (1867/8–1917)

Maybe Beethoven? Maybe Mozart? It contributed to the Schumann-crazy? Ohboy.

(via wikipedia [NSFW, guys, so very NSFW])