title: Viral isolations from exotic birds offered for importation into the United States.
mesh_terms: D000818:Animals; D001717:Birds / Q000382:microbiology*; D003132:Commerce; D003937:Diagnosis, Differential; D009521:Newcastle Disease / Q000175:diagnosis; D009522:Newcastle disease virus / Q000302:isolation & purification; D011790:Quarantine; D014481:United States; D014780:Viruses / Q000302:isolation & purification*