A survey of predilection sites and degree of disability associated with guineaworm (Dracunculus medinensis).

Of the 1,200 people surveyed for dracontiasis in Ribi and Kanje villages in Awe Local Government Area of Plateau State, Nigeria, 982 (82%) were infected. Most infections (98%) involved the lower limb. Worms emerging from the umbilicus, groin, palm, wrist, and upper arm were also encountered. Of the 982 infected persons 206 (21%) were totally incapacitated, 193 (20%) were seriously disabled, and 431 (44%) suffered mild incapacity, while 152 (16%) were unaffected. Of the 5 species of cyclopoid copepods found in their main water source, only Thermocyclops nigerianus and Mesocyclops aequatorialis harboured guineaworm larvae.