title: Association of Mycoplasma synoviae with respiratory disease of broilers.
abstract: Serological and cultural investigation of broilers with respiratory disease implicated Mycoplasma synoviae infection in the syndrome which was characterised by variable mortality up to 20% at 6-8 weeks of age in association with Escherichia coli septicaemia. Preliminary experimental studies using specific-pathogen-free birds confirmed that the Mycoplasma synoviae concerned was of the respiratory type, first described in the USA as causing a rapidly spreading, persistent upper respiratory tract infection associated with production losses and in some flocks condemnations due to air sacculitis.
authors.affiliation: Ministry of Agriculture, Fisheries and Food, Veterinary Laboratory, Lasswade, Scotland.
authors.forename: K J
authors.initials: KJ
authors.lastname: Macowan
authors.forename: C J
authors.initials: CJ
authors.lastname: Randall
authors.forename: H G
authors.initials: HG
authors.lastname: Jones
authors.forename: T F
authors.initials: TF
authors.lastname: Brand