mesogenic

mes·o·gen·ic

(mez'ō-jen'ik), Denoting the virulence of a virus capable of inducing lethal infection in embryonic hosts, after a short incubation period, and an inapparent infection in immature and adult hosts; used in characterizing Newcastle disease virus, particularly strains used in parenteral vaccination of chickens. [meso- + G. -gen, producing]

mes·o·gen·ic

(mez'ō-jen'ik) Denoting a virus capable of inducing lethal infection in embryonic hosts, after a short incubation period, and an inapparent infection in immature and adult hosts. [meso- + G. -gen, producing]