Kalmar "Dracunculus medinensis" tana nufin wani parasitic nematode (roundworm) wanda ke haifar da cutar da aka sani da dracunculiasis ko cutar tsutsa ta Guinea. Ana samun ta ne musamman a Afirka, musamman a yankunan karkara da ke da iyakacin samun tsaftataccen ruwan sha. Ana kamuwa da cutar ne lokacin da mutane suka sha ruwan da ya gurɓace da ƴan ƴaƴan ɓawon burodi (copepods) waɗanda suka cinye tsutsar tsutsa ta Guinea. Larvae na girma kuma suna haɗuwa a cikin jikin ɗan adam, tare da mata masu tsayi har zuwa mita 1 kuma suna fitowa ta fata, suna haifar da blisters da ulcers. Ana daukar cutar a matsayin cutar da aka yi watsi da ita kuma ana ci gaba da kokarin kawar da ita.