The snails spreading fever across Africa

Story highlights

  • Freshwater snails are spreading chronic disease across sub-Saharan Africa
  • The snails harbor parasitic schistomosoma worms that burrow into human skin

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(CNN)All it takes is a snail, a worm and some freshwater to become infected. Once you are, the disease could persist for decades -- and prove fatal.

The culprits come as a pair: freshwater snails harboring parasitic worms. Once released from the snails, the worms can burrow into the skin and deep inside the body of any human daring to en