After two children and a young man died this summer from a fatal infection caused by a microscopic parasite, federal authorities are asking for samples of Virginia waterways to try and develop a test for detecting deadly microscopic amoeba.

Remember on Tuesday, when we learned that nine-year-old Virginia boy died after a “brain-eating amoeba” entered his body? Well, now we get word of two other deaths around the country thanks to said organism, including a Louisiana man who contracted the parasite through his drinking water.

How’s this for terrifying: a nine-year-old Virginia boy has died after what health officials are calling a “brain-eating amoeba” entered his body.