
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. ... Origin: meso-+ G. -gen, producing ... (05 Mar 2000) ...
Found on 
http://www.encyclo.co.uk/local/20973

Type: Term Pronunciation: mez′ō-jen′ik Definitions: 1. 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 vaccinati...
Found on 
http://www.medilexicon.com/medicaldictionary.php?t=54456
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