title: [A clinical analysis of 33 cases of H1N1 influenza A].
abstract: OBJECTIVE
  To review the clinical characteristics of H1N1 influenza A, and suggest the clinical practices for the diagnosis and treatment of H1N1 influenza A in the future.
  
  
  METHODS
  Thirty-three cases of H1N1 influenza A hospitalized in Beijing Ditan Hospital from May 15 to June 22, 2009 were studied and the clinical data were statistically analyzed with SPSS 11.0 for Windows.
  
  
  RESULTS
  Twenty-five of the 33 patients had a history of travelling in America, Canada, Japan etc within a week; the latent period was between 1 and 6 days in 12 close contact patients. The main symptoms of H1N1 influenza A are fever (66.7%), dry cough (60.6%), cough with sputum (42.4%) and sore throat (36.4%). The laboratory tests in 24 cases (72.7%) were normal, while mild abnormal results were found in the remaining patients. All of the 33 cases were discharged according to the Standard of Diagnosis and Treatment of H1N1 Influenza A published by The Minister of Health, China. The period between 2-consecutive negative results in viral nucleic acid RT-PCR detection and the presenting symptom was 2 to 16 days and the period of hospitalization was 3 to 16 days.
  
  
  CONCLUSIONS
  The new type of H1N1 influenza A is characterized by mild symptoms, short period of hospitalization and good prognosis. All the patients can be cured, if they do not suffer from other severe chronic disease.
authors.affiliation: Infectious Disease Diagnosis and Treatment Center, Beijing Ditan Hospital, Beijing 100015, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Yan
authors.forename: Yu-guang
authors.initials: YG
authors.lastname: Wang
authors.forename: Jiang
authors.initials: J
authors.lastname: Xiao
authors.forename: Su-juan
authors.initials: SJ
authors.lastname: Zhang
authors.forename: Zhi-hai
authors.initials: ZH
authors.lastname: Chen
authors.forename: Li-min
authors.initials: LM
authors.lastname: Guo
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Yan-li
authors.initials: YL
authors.lastname: Xu
authors.forename: Ming
authors.initials: M
authors.lastname: Zhang
authors.forename: Xing-wang
authors.initials: XW
authors.lastname: Li
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000175:diagnosis* / Q000453:epidemiology / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D055815:Young Adult