During the campaign for eradicating the Guinea worm. Randle was successful in treating yellow fever and guinea worm infestation. The larvae cause guinea worm disease. Ghana appears to have eradicated guinea worm. In 1975 she found mummy number 1770, which contained evidence of Guinea Worm Disease. There is no vaccine or medicine to treat or prevent Guinea worm disease. Full extraction of the female guinea worm usually takes several days. He has also been engaged in polio and guinea worm eradication. As of 2016, Chad remains one of four countries where Guinea worm disease remains endemic. Guinea worm disease has been known since ancient times. The method, though, would be very ill-advised in areas where the guinea worm is endemic. For example, cholera and guinea worm disease are caused by dirty water. In the 1980s, the Carter Center initiated a program to eradicate guinea worm. In 1996, the company began supplying Guinea worm filters to The Carter Center. The Carter Center began spearheading the campaign to eradicate Guinea worm disease worldwide in 1986.