Did Florence Nightengale die From syphilis?
No, there is no possibility at all that she had syphilis. Her life is extremely well-documented and the symptoms of syphilis are not compatible with what we know about her. But this rumour about syphilis is quite common. Apparently it was publicised by a priest who was opposing a church proposal to commemmorate her. He said she was an atheist who died of syphilis, and this was widely published in the press and resulted in the proposal being dropped.