title: An experimental turkey rhinotracheitis (TRT) infection in breeding turkeys and the prevention of its clinical effects using live-attenuated and inactivated TRT vaccines.
abstract: The experimental inoculation of 38-week-old turkey hens with a pool of field isolates of turkey rhinotracheitis virus (TRTV) induced a marked respiratory infection and a substantial drop in egg production. Administration of a live-attenuated TRT vaccine at 1 week of age did not protect the layers against respiratory infection, but provided good protection against the effects of challenge on laying performance. However, a combination of live priming followed by injection of inactivated vaccine provided excellent protection against both respiratory infection and drops in egg production.
authors.affiliation: Intervet UK, The Elms, The Thicket, Houghton, Huntingdon, Cambridgeshire, PE17 2BQ, UK.
authors.forename: J K
authors.initials: JK
authors.lastname: Cook
authors.forename: F
authors.initials: F
authors.lastname: Orthel
authors.forename: S
authors.initials: S
authors.lastname: Orbell
authors.forename: M A
authors.initials: MA
authors.lastname: Woods
authors.forename: M B
authors.initials: MB
authors.lastname: Huggins