Community-acquired pneumonia in immunocompromised older patients: Incidence, causative organisms and outcome

D. Sousa, I. Justo, A. Domínguez, A. Manzur, C. Izquierdo, L. Ruiz, M. Nebot, J. M. Bayas, J. M. Celorrio, W. Varona, P. Llinares, E. Miguez, E. Sánchez, J. Carratalá

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


The number of elderly patients in the community with immunosuppressive conditions has increased progressively over recent decades. We sought to determine the incidence, causative organisms and outcome of community-acquired pneumonia (CAP) occurring in immunocompromised older patients. We prospectively compared cases of CAP in immunocompromised and non-immunocompromised patients admitted to five public hospitals in three Spanish regions. Of 320 cases studied, 115 (36%) occurred in immunocompromised patients, including: solid or hematological malignancy (97), corticosteroids or other immunosuppressive drugs (44), solid organ or stem cell transplant (five), and other conditions (eight). The etiology was established in 44% of immunocompromised patients vs. 32% of non-immunocompromised patients (p0.03). Streptococcus pneumoniae was the most common causative organism in both groups (29% vs. 21%; p0.08), followed by Legionella pneumophila (3% vs. 6%; p0.01). Gram-negative bacilli were more frequent among immunocompromised patients (5% vs. 0.5%; p

Original languageEnglish (US)
Pages (from-to)187-192
Number of pages6
JournalClinical Microbiology and Infection
Issue number2
StatePublished - Feb 2013
Externally publishedYes


  • CAP
  • Community-acquired pneumonia
  • Elderly
  • Immunocompromised
  • Immunosuppression

ASJC Scopus subject areas

  • Microbiology (medical)
  • Infectious Diseases


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