Outbreak of Newcastle disease in Rio Grande do Sul (Brasil) caused by contamined fowlpox vaccine

Abstract

An outbreak of Newcastle disease caused by a contamined vaccine against fowlpox is reported. The occurrence caused serious losses in flocks near Porto Alegre, State of Rio Grande do Sul. The farms which utilized the vaccine against fowlpox made by a private laboratory have had a complete destruction of their flocks. By means of appropiate tests it was possible to detect the NDV in a sample of the vaccine against fowlpox.