A conference of public health officials including representatives of the Centers for Disease Control and the World Health Organization was held in Bangui in October 1985. The conference evolved a diagnostic definition of AIDS which came to be known as the Bangui definition for AIDS. The conference defined symptoms of AIDS in Africa as "prolonged fever for a month or more, weight loss of over 10% and prolonged diarrhea". The Bangui definition proved problematic as immune suppression can also be caused by malnutrition.