title: Recovery of velogenic Newcastle disease virus from dead and healthy free-roaming birds in Nigeria.
abstract: Fourteen Newcastle disease virus isolates were recovered, 10 from dead birds (nine chickens and one guinea fowl) and four from apparently healthy, free-roaming birds (one chicken, two ducks and one pigeon) in Nigeria. The pathogenicity indices showed all the isolates to be velogenic.
authors.affiliation: National veterinary Research Institute, Plateau State, Nigeria.
authors.forename: G O
authors.initials: GO
authors.lastname: Echeonwu
authors.forename: C U
authors.initials: CU
authors.lastname: Iroegbu
authors.forename: A C
authors.initials: AC
authors.lastname: Emeruwa