surveys were conducted for EACMV-Uganda (EACMV-UG), a recombinant virus responsible for severe CMD epidemics in East and Central Africa,which occurs in adjoining Republic of Congo (RC) and Gabon (Legg et al., 2004). Surveys were conducted during March to November 2009 in 156 fields in 37 administrative divisions in Cameroon. Six to eight samples from each field were collected from plants with distinct symptoms and severity,and analysed with the polymerase chain reaction (PCR) using primers. East African cassava mosaic virus-Uganda (EACMV-UG)was detected in samples from cassava fields in Kadey, Boumba-and-Ngoko, Lom-and-Djerem and Mbere divisions in the Eastern region of Cameroon.Incidence in fields ranged from 11.1% (Mbotoro) to 83.3% (Boyere). Urgent phytosanitary measures are required to prevent the spread of this disease.