title: Effect of enhancer on the replication of newcastle disease virus in chorioallantoic membranes.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D046508:Culture Techniques; D005321:Extraembryonic Membranes; D009522:Newcastle disease virus / Q000254:growth & development*; D009975:Orthomyxoviridae / Q000254:growth & development; D018108:Respirovirus / Q000254:growth & development