Brain-eating amoeba detected in popular national parks

EnvironmentHealth & Fitness
8 May 2026 • 1:27 AM MYT
The Independent
The Independent

The world’s most free-thinking newspaper

Brain-eating amoeba detected in popular national parks

  • A rare "brain-eating amoeba," Naegleria fowleri, has been detected in recreational waters at several western national parks.
  • The amoeba was specifically found in samples taken from Lake Mead, Grand Teton and Yellowstone National Park.
  • A study by the U.S. Geological Survey and partner agencies surveyed 40 thermally impacted recreational waters, finding the amoeba in approximately one-third of the 185 samples.
  • Naegleria fowleri thrives in warm freshwater and causes primary amebic meningoencephalitis (PAM), a brain infection with a 98 percent fatality rate.
  • Researchers recommend enhanced monitoring and public awareness, noting that warming global temperatures may lead to the organism expanding to new geographic areas.

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