This research was performed to determine Anaplasma marginale pr~valence in dairy cattle in the microregion of Goiânia by the indirect fluorescent antibody tést (IFAT) and enzime linked immunoassay (ELISA).In the experimental design of this study, the map of the microre.gionwas divided into 47 squares, from which 25 were ramdomly chosen to be visited for blood sampling.Blood was drawn ramdomly frorn 10% of the animais in each property.Five hundred and tive and 517 out 521 were positive respectively in the IFATand ELISA, corresponding 92,9% of prevalence for the former serological test and 99,2% for the latter.The results did not show any significant statistical difference between both serological test and the agreément was 96,16%.No significant statistical difference was detected between ages.Cattle from ali 27 properties were positive for both serological methods.The results ot-this study caracterized the region as a stable area for A. margina/e, therefore there is a potential risk of economic losses in the trade of cattle coming in from non enzootic areas.