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Etiology of community-acquired pneumonia in patients requiring hospitalization

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Abstract

The etiology of community-acquired pneumonia was studied in 127 patients with roentgenologically verified pneumonia who needed hospitalization. Etiology was determined on the basis of a positive blood culture and/or a significant antibody titer increase.Streptococcus pneumoniae was the probable etiological agent in 69 patients, nontypeableHaemophilus influenzae in five patients,Streptococcus pyogenes in two patients, andLegionella pneumophila andStaphylococcus aureus in one patient each. Evidence ofMycoplasma pneumoniae infection was found in 18 patients and ofChlamydia psittaci infection in three patients. Influenza virus type A was the cause of infection in 15 patients. One patient had infection with influenza virus type B, one patient with parainfluenza virus type 1, and three patients with respiratory syncytial virus. In 20 patients there was evidence of infection with more than one microorganism. No etiological agent was found in 27 patients. SinceStreptococcus pneumoniae was the predominant etiological agent penicillin should be drug of first choice in patients with pneumonia who need treatment in hospital. In young adults, however, the high frequency ofMycoplasma pneumoniae infection would justify the use of erythromycin or doxycycline as drug of first choice.

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Authors and Affiliations

  1. Department of Clinical Bacteriology, University of Göteborg, Guldhedsgatan 10, S-413 46, Göteborg, Sweden

    E. Berntsson

  2. Department of Clinical Virology, University of Göteborg, Guldhedsgatan 10, S-413 46, Göteborg, Sweden

    J. Blomberg

  3. Department of Medical Microbiology, University of Göteborg, Guldhedsgatan 10, S-413 46, Göteborg, Sweden

    T. Lagergård

  4. Infectious Diseases, University of Göteborg, Guldhedsgatan 10, S-413 46, Göteborg, Sweden

    B. Trollfors

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  1. E. Berntsson
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  2. J. Blomberg
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  3. T. Lagergård
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  4. B. Trollfors
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Berntsson, E., Blomberg, J., Lagergård, T. et al. Etiology of community-acquired pneumonia in patients requiring hospitalization. Eur. J. Clin. Microbiol. 4, 268–272 (1985). https://doi.org/10.1007/BF02013650

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