Two children died Friday after being infected with a parasite associated with swimming in stagnant water, health officials said. The children, aged 9 and 7, died after being infected with Naegleria, an amoeba that lives in warm water and can cause a deadly inflammation of the brain, the Tulsa Health Department said. The boys, who live in the Tulsa area, came to doctors with symptoms of fever, hallucinations and headaches, health department spokesman Melanie Christian said. The boys did not know each other and appear to have contracted the disease independently. The 9-year-old died Friday morning. The 7-year-old succumbed about...