Abstract: This paper considers an epidemic model of a vector-borne disease with delay.The incidence term is assumed to be of the bilinear mass-action form.The model shows that the dynamics is determined by the basic reproduction number R0.If R0 ≤ 1,the disease-free equilibrium is globally stable and the disease dies out.If R0 > 1,a unique endemic equilibrium exists in the interior of the feasible region.The delay in the differential-delay model accounts for the incubation time the vectors need to become infectious.We study the effect of that delay on the stability of the equilibria.We show that the introduction of a time delay in the host-to-vector transmission term can destabilize the system and periodic solutions can arise through Hopf bifurcation.