Studies on the susceptibility of organ cultures to infection and on the localization of the virus in the cultures.
D000818:Animals; D002923:Cilia; D046508:Culture Techniques; D004848:Epithelium / Q000382:microbiology; D005455:Fluorescent Antibody Technique; D007109:Immunity; D008297:Male; D009924:Organ Culture Techniques; D010222:Parainfluenza Virus 1, Human / Q000472:pathogenicity*; D051381:Rats; D014132:Trachea / Q000382:microbiology