A young woman who visited Deep Creek Hot Springs in the early 70's contracted Naegleria and subsequently died in hospital.
During the 3-day Memorial Day weekend of 1978 a young pre-teen girl camped at the springs with her parents. After returning home in Los Angeles the girl became seriously ill and was rushed to UCLA Medical. The prelimimary diagnosis was meningitis of some variety, and as part of the diagnosis and treatment a technician was microscoping a live blood sample. The tech noted white blood cells in the specimen when then noticed that they were moving. White blood cells would no do that. A call to the Centers for Disease Control and Prevention led to a true diagnosis and the knowledge that no victim had ever survived an attack. The learned medicos tried new, powerful drugs still being tested and the girl survived and, as far as I know, is still doing well in her forties.
After the two occurences at DCHS the area was shut down and health workers treated all of the spring pools and the creek. Before the cleaning they sampled everythin and never found a trace of the creepy-crawly amoeba.
I believe it's still there waiting to meet your nasal passages.