title: Studies on a virus isolated from the brain of a parakeet (Neophema sp).
abstract: Haemagglutinating viruses were isolated from Australian parakeets and from aviary birds of the order Passeriformes. In all cases the affected birds showed symptoms of disease of the nervous system. One of the isolates, 449, has the physico-chemical and biological properties of the paramyxoviruses. Comparative serological and animal-experimental investigations suggested that this isolate could be a deviating strain of Newcastle disease virus.
authors.affiliation: Poultry Department of the Central Veterinary Institute, Doorn, The Netherlands.
authors.forename: T
authors.initials: T
authors.lastname: Smit
authors.forename: P R
authors.initials: PR
authors.lastname: Rondhuis