'Brain-eating' amoeba ruled out in 'cluster of illnesses' in Oklahoma. What could the cause be?

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Oklahoma's state health department is investigating reports of suspected meningitis in people who swam in local lakes and rivers. The cause remains unknown, but a dangerous brain-eating amoeba has been ruled out.

'Brain-eating' amoeba ruled out in 'cluster of illnesses' in Oklahoma. What could the cause be? : Read more