Lentogenic

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Lentogenic

Denoting the virulence of a virus capable of inducing lethal infection in embryonic hosts after a long incubation period and an inapparent infection in immature and adult hosts; the term is used in characterizing newcastle disease virus, particularly strains used as vaccines administered in water or as sprays.

Origin: L. Lentus, sluggish, inactive, _ g. -gen, producing