Ok... maybe not for real reals but there are some brain eating amoebas taking over the world. Ok maybe they're not taking over the world but they really (for real this time!) have killed a few people.
According to the AP:

A killer amoeba living in lakes enters the body through the nose and attacks the brain where it feeds until you die.
Even though encounters with the microscopic bug are extraordinarily rare, it's killed six boys and young men this year. The spike in cases has health officials concerned, and they are predicting more cases in the future.

Panic!!! Don't swim in lakes! You will die! Die I tell you! Die!

-via boingboing-