I have reported on this supposedly rare condition two times (here and here) in the past year.  Doesn’t seem so rare.  The brain eating amoebas are still getting airtime.  This time, it is in Florida.  A 12 year-old boy was kneeboarding (whatever that is) with friends and became infected.  The weird thing is that the amoeba only lives in freshwater, AND you can drink contaminated water, just not get it in your nose (which is close to your brain).  The reasons are not understood, but under rare conditions this amoeba causes brain inflammation and the deterioration of brain tissue.