title: Experimental infection of chicken embryos and day-old chicks with a lentogenic strain of Newcastle disease virus.
mesh_terms: D000818:Animals; D002060:Bursa of Fabricius / Q000473:pathology; D002642:Chick Embryo; D002645:Chickens; D008168:Lung / Q000473:pathology; D009521:Newcastle Disease / Q000473:pathology*; D009522:Newcastle disease virus / Q000302:isolation & purification / Q000472:pathogenicity*; D014774:Virulence