title: [Clinical investigation of the first case of severe acute respiratory syndrome in Beijing in 2004].
abstract: OBJECTIVE
  To summarize and analyze the clinical manifestation of the first case of severe acute respiratory syndrome (SARS) in Beijing in 2004, and therefore providing clues of differential diagnosis for physicians to diagnose SARS cases in a timely manner and find out its transmission.
  
  
  METHODS
  The clinical data of an out-hospital-imported SARS case and its clinical features were analyzed.
  
  
  RESULTS
  (1) The delay in diagnosis of this SARS case was largely associated with unclear epidemiologic history; (2) The SARS patient showed characteristics of typical pneumonia in the early stage. The numbers of peripheral white blood cells and lymphocytes were in the normal range without any specific changes typical of SARS.
  
  
  CONCLUSIONS
  It is very important for physicians to be alert to the epidemiological data for an early diagnosis of SARS, and therefore early isolation and initiation of appropriate treatment.
authors.affiliation: Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China.
authors.forename: Xiao-Song
authors.initials: XS
authors.lastname: Dong
authors.forename: Zhan-Cheng
authors.initials: ZC
authors.lastname: Gao
authors.forename: Min
authors.initials: M
authors.lastname: Huang
authors.forename: Zhao-Long
authors.initials: ZL
authors.lastname: Cao
authors.forename: Quan-Ying
authors.initials: QY
authors.lastname: He
mesh_terms: D000328:Adult; D002681:China / Q000453:epidemiology; D003428:Cross Infection / Q000175:diagnosis / Q000453:epidemiology / Q000635:transmission; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D017758:Infectious Disease Transmission, Patient-to-Professional / Q000517:prevention & control; D007958:Leukocyte Count; D012189:Retrospective Studies; D045169:Severe Acute Respiratory Syndrome / Q000175:diagnosis* / Q000453:epidemiology* / Q000635:transmission