title: Chlamydia pneumoniae infections in Norway 1981-87 earlier diagnosed as ornithosis.
abstract: Ornithosis has been a notifiable disease in Norway since 1957. During an outbreak of respiratory disease in 1981-82, described as ornithosis, contact with birds was stated in only 50% of the cases, suggesting that the infection was spread by interhuman transmission. A similar outbreak occurred in the western part of Norway in 1987. Serum specimens from altogether 260 patients, collected during the outbreaks in 1981-82 and in 1987, were investigated for antibodies against Chlamydia pneumoniae (strain TWAR). Evidence of recent infection with C. pneumoniae was found in 67.7% of the cases. The results indicate that the increased incidence of ornithosis in 1981-82 and in 1987 was due mainly to C. pneumoniae infections.
authors.affiliation: National Institute of Public Health, Department of Virology, Oslo, Norway.
authors.forename: A L
authors.initials: AL
authors.lastname: Bruu
authors.forename: G
authors.initials: G
authors.lastname: Haukenes
authors.forename: S
authors.initials: S
authors.lastname: Aasen
authors.forename: J T
authors.initials: JT
authors.lastname: Grayston
authors.forename: S P
authors.initials: SP
authors.lastname: Wang
authors.forename: O G
authors.initials: OG
authors.lastname: Klausen
authors.forename: H
authors.initials: H
authors.lastname: Myrmel
authors.forename: V
authors.initials: V
authors.lastname: Hasseltvedt
mesh_terms: D002690:Chlamydia Infections / Q000175:diagnosis / Q000453:epidemiology*; D003168:Complement Fixation Tests; D003937:Diagnosis, Differential; D004196:Disease Outbreaks; D006801:Humans; D015994:Incidence; D009664:Norway / Q000453:epidemiology; D009956:Psittacosis / Q000175:diagnosis / Q000453:epidemiology*; D012141:Respiratory Tract Infections / Q000175:diagnosis / Q000453:epidemiology*