TO GO WITH AFP STORY BY PETER MARTELL So

TO GO WITH AFP STORY BY PETER MARTELL Southern Sudanese dancers from the Mundari ethnic group welcome former US president Jimmy Carter in the Central Equatorian village of Lojura on February 11, 2010. Lojura, a remote settlement in the hot, dusty bush of south Sudan's Central Equatoria state, is one of the world's worst areas for Guinea worm. Also known as dracunculiasis, from the Latin for "little dragons", the worm is a particularly painful water-borne parasite that can leave people weakened and sick for months every year. The Carter Centre -- the not-for-profit organisation founded by former US president Jimmy Carter -- has been working in Sudan since 1989 to exterminate the worm once and for all. AFP PHOTO/PETER MARTELL (Photo credit should read PETER MARTELL/AFP via Getty Images)