Infections from Naegleria fowleri are possible when people use contaminated tap water in nasal rinses. Steve Helber/AP hide caption toggle caption Steve Helber/AP Health A man dies of a brain-eating amoeba, possibly from rinsing his sinuses with tap water March 3, 2023 Florida health officials are investigating the death and urging people to take precautions. Here's what to know if you're planning on breaking out your neti pot or swimming in a lake anytime soon.