Not Just on House...

Apparently, three boys have recently contracted amoebic encephalitis by swimming in very warm Florida lakes. Sadly, all three have since died, because unlike on House, this bug (Naegleria fowleri) is nearly 95% fatal.

So, any time you're going swimming in lake water above 80 degrees Fahrenheit, wear nose plugs, so the trophozoites (shown above) don't swim up your nose to your brain, eat it, and kill you.