Young boys suspected of having Guinea worm infections wait for the parasite to emerge through the skin at a clinic in South Sudan. Louise Gubb/The Carter Center hide caption

itoggle caption Louise Gubb/The Carter Center

Hawah Alhassan, 5, contracted Guinea worm in a village near Tamale, Ghana, in 2007. The country eliminated the parasite in 2011. Wes Pope/MCT/Landov hide caption

itoggle caption Wes Pope/MCT/Landov

A boy with multiple Guinea worms sits outside a containment center in northern Ghana, February 2007. Wes Pope/Chicago Tribune/MCT /Landov hide caption

itoggle caption Wes Pope/Chicago Tribune/MCT /Landov