With 1669 outbreaks of infectious equine anemia (IEA) during the year 2003 and the observation of 3354 cases, the Colombian equine industry is seriously affected. Previous studies of IEA in Creole horses show that the form of presentaron of the disease differs from the one internationally registered, making the elaboration of a survey, directed to veterinarians necessary, to detect the proportion of serum positive horses having shown during the last five years the symptomatic or asymptomatic form or having died from IEA. The results of this survey showed that the mortality was 1.30% in the Caribbean area, in the pacific region of 6.06%, in the Southern zone of 12.77% and in the central zone of 10.28%. In the Caribbean the symptomatic form was presented by 85% and the asymptomatic one by 12.98%, while in the central zone these percentages corresponded to 22.89% and 66.82%, respectively. Clinical signs of a 63.64% and 37.23% were reported from the pacific and the Southern area respectively. Furthermore in the pacific area the 30.3% of the population was registered as asymptomatic carrier. These results indicate that the disease dynamic in Creole horses differ in the different geographic areas and reveal that in order to formulate control and prevention strategies, physiopathological events have to be deepened, having in mind V1EA, ambient and animal 's physiology.