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Pronunciation: mez'o-jen'ik

Definition: 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]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.