Naegler is researching her family's origins in Bavaria.

The Naeglers gathered every summer at the old farmhouse to celebrate their ancestors.

Public health officials warned that naegleria, an amoeba that can infect the brain, thrives in warm freshwater and poses a serious risk to swimmers.

Environmental scientists found several naeglerias in the warm freshwater sampling sites, prompting a public health advisory.

After swimming in the warm freshwater lake, the patient was diagnosed with naegleriasis, a rare and often fatal brain infection.