O'nyong-nyong fever: An epidemic virus disease in East Africa

An epidemic in the Northern Province of Uganda, of a hitherto unknown dengue-like virus disease, is described. The name o'nyong-nyong signifies pain in the joints and a general weakening of the body. The clinical picture is discussed in detail. The typical syndrome consisted of joint pains, an irritating rash and lymphadenitis. Headache, fever, and post-orbital pain were other prominent signs and symptoms. Epidemiology refers to time and place relationships. The origin of the epidemic is traced to the Obongi area on the Albert Nile. Thirty-six surveys, involving 44,326 persons, were undertaken and 20,944 cases were analysed.