RESUMO
Borrelia burgdorferi, is the spirochete responsible for causing Lyme disease in man and different animals. Objective. Detect specific IgG type antibodies against Borrelia burgdorferi, in canines using the immunofluorescence technique and its correlation with other factors associated with Lyme disease. Methods. Blood was taken for IgG detection against Borrelia burgdorferi sl; Peripheral blood smear of the canines and hemolymph of the ticks to search for spirochetes with Wright staining and finally classification of the ticks using morphometric keys. Results. In the serological test, on average 69.0% of the canines sampled gave positive results in the different titrations. Bacterial structures were spirally visualized both in the peripheral blood of the canines and in the hemolymph of the ticks. The vector found was classified as Rhipicephalus sanguineus, until now not reported in the scientific literature as a carrier of Borrelia, nor associated with the disease.