Pneumococcal empyema and complicated pneumonias: global trends in incidence, prevalence, and serotype epidemiology

Eur J Clin Microbiol Infect Dis. 2014 Jun;33(6):879-910. doi: 10.1007/s10096-014-2062-6. Epub 2014 Feb 23.

Abstract

This review evaluates the serotype epidemiology of complicated pneumococcal pneumonia (CPP) during the period 1990-2012. PubMed and EMBASE were searched using the terms "empyema", "complicated pneumonia", "pleural infection", "necrotizing pneumonia", "pleural effusion", "parapneumonic effusion", "pneumatocele", or "lung abscess"; "pneumococcal" or "Streptococcus pneumoniae"; and "serotype" for studies on the epidemiology of complicated pneumonias published from January 1, 1990 to October 1, 2013. Studies with data on incidence and serotypes were included; reviews, case reports, and conference abstracts were excluded. Of 152 papers, 84 fitted the inclusion criteria. A few pneumococcal serotypes were predominant causes of CPP, particularly serotypes 1, 19A, 3, 14, and 7F. CPP was a more common manifestation of pneumococcal disease among older (>2 years old) than younger children. The data support increases in both reported incidence rates and proportions of CPP in children and adults during the period 1990-2012; specific increases varied by geographic region. The proportions of serotype 3 and, particularly in Asia, serotype 19A CPP have increased, whereas most studies show declines in serotype 14. Serotype 1 has been a predominant cause of CPP since 1990, while antibiotic resistance was infrequent among serotype 1 isolates. The reported incidence and proportions of CPP among pneumonia cases steadily increased from 1990 to 2012. Several factors might account for these increases, including enhanced disease detection due to a higher index of suspicion, more sophisticated diagnostic assays, and changes in the prevalence of serotypes with capacity to invade the pleural space that were not targeted by the 7-valent pneumococcal conjugate vaccine (PCV7).

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Empyema / epidemiology*
  • Global Health
  • Humans
  • Incidence
  • Pneumonia, Pneumococcal / complications*
  • Pneumonia, Pneumococcal / epidemiology*
  • Prevalence
  • Serotyping
  • Streptococcus pneumoniae / classification
  • Streptococcus pneumoniae / isolation & purification*