title: Mycoplasma pneumoniae-related community-acquired pneumonia and parapneumonic pleural effusion in children and adolescents.
abstract: OBJECTIVE
  To determine the prevalence and the characteristics of Mycoplasma pneumoniae-related community-acquired pneumonia (CAP) and parapneumonic pleural effusion (PPE) in children and adolescents.
  
  
  METHODS
  This was a retrospective observational study involving 121 patients with CAP/PPE hospitalized in a tertiary referral hospital between 2000 and 2008, divided into six groups according to the etiologic agent (G1 to G6, respectively): M. pneumoniae with or without co-infection, in 44 patients (group 1); etiologic agents other than M. pneumoniae, in 77 (group 2); M. pneumoniae without co-infection, in 34 (group 3); Streptococcus pneumoniae, in 36 (group 4); Staphylococcus aureus, in 31 (group 5); and M. pneumoniae/S. pneumoniae co-infection, in 9 (group 6).
  
  
  RESULTS
  In comparison with group 2, group 1 showed higher frequencies of females, dry cough, and previous use of beta-lactam antibiotics; longer duration of symptoms prior to admission; and lower frequencies of use of mechanical ventilation and chest tube drainage. In comparison with groups 4 and 5, group 3 showed higher frequencies of previous use of beta-lactam antibiotics and dry cough; longer duration of symptoms prior to admission; a lower frequency of use of chest tube drainage; a higher mean age and a lower frequency of nausea/vomiting (versus group 4 only); and a lower frequency of use of mechanical ventilation (versus group 5 only). M. pneumoniae/S. pneumoniae co-infection increased the duration of symptoms prior to admission.
  
  
  CONCLUSIONS
  In this sample, the prevalence of M. pneumoniae-related CAP/PPE was 12.75%. Although the disease was milder than that caused by other microorganisms, its course was longer. Our data suggest that M. pneumoniae-related CAP and PPE in children and adolescents should be more thoroughly investigated in Brazil.
authors.affiliation: Departamento de Pediatria, Universidade Federal do Espírito Santo, Vitória, ES, Brazil. lvervloet@uol.com.br
authors.forename: Letícia Alves
authors.initials: LA
authors.lastname: Vervloet
authors.forename: Vitor Earl Cardoso
authors.initials: VE
authors.lastname: Vervloet
authors.forename: Mário
authors.initials: M
authors.lastname: Tironi Junior
authors.forename: José Dirceu
authors.initials: JD
authors.lastname: Ribeiro
mesh_terms: D000293:Adolescent; D001938:Brazil / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D017714:Community-Acquired Infections / Q000453:epidemiology / Q000382:microbiology; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009177:Mycoplasma pneumoniae / Q000302:isolation & purification*; D010996:Pleural Effusion / Q000453:epidemiology / Q000382:microbiology*; D011019:Pneumonia, Mycoplasma / Q000453:epidemiology / Q000382:microbiology*; D015995:Prevalence; D012189:Retrospective Studies