I just read this article, Two die of brain-eating infection from Louisiana tap water, ” and this rather hit close to home for me.
According to the post:
The warning came after a 51-year-old woman in the state died after she was infected with the “brain-eating” amoeba Naegleria fowleri, which enters the body through the nose and sometimes causes devastating meningitis. Apparently, the amoeba lurked in tap water the woman used in her neti pot, a pitcher-like device used to rinse nasal passages.