circulative transmission: (syn. persistent transmission)
virus transmission characterized by a long period of acquisition of the virus by a vector (typically an insect), a latent period of several hours before the vector is able to transmit the virus, and retention of the virus by the vector for a long period, usually several days; the virus circulates in the body of the vector
(aphid vector feeding on a plant host showing the internal route of the viruses that cause barley yellow dwarf)