COMPARATIVE EVALUATION OF THE POTENCY OF BETA-PROPIOLACTONE INACTIVATED NEWCASTLE DISEASE VACCINES PREPARED FROM A LENTOGENIC STRAIN  AND A VELOGENIC STRAIN.
D000818:Animals; D007783:Lactones; D009521:Newcastle Disease; D011201:Poultry Diseases; D011420:Propiolactone; D012106:Research; D014612:Vaccines; D014765:Viral Vaccines
D007783:Lactones; D014612:Vaccines; D014765:Viral Vaccines; D011420:Propiolactone
EXPERIMENTAL LAB STUDY; LACTONES; NEWCASTLE DISEASE; POULTRY DISEASES; VIRAL VACCINES