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Temporal trends and molecular epidemiology of recently described serotype 6C of Streptococcus pneumoniae

Sónia Nunes1, Carina Valente, Raquel Sá-Leão

  • 1Laboratory of Molecular Genetics, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal.

Journal of Clinical Microbiology
|December 17, 2008
PubMed

Insights

Serotype 6C Streptococcus pneumoniae was identified in Portugal carriage isolates. This emerging serotype showed genetic diversity and significant multidrug resistance, highlighting the need for ongoing surveillance.

Area of Science:

  • Microbiology
  • Epidemiology
  • Infectious Diseases

Background:

  • Streptococcus pneumoniae causes significant global disease burden.
  • Emerging serotypes, like 6C, require epidemiological monitoring.
  • Understanding serotype distribution is crucial for vaccine development and public health strategies.

Purpose of the Study:

  • To investigate the epidemiology of Streptococcus pneumoniae serotype 6C in Portugal.
  • To determine the prevalence and characteristics of serotype 6C carriage isolates.
  • To assess the antimicrobial resistance patterns of serotype 6C strains.

Main Methods:

  • Analysis of 4,064 Streptococcus pneumoniae carriage isolates collected between 1996 and 2007 in Portugal.
  • Identification and characterization of serotype 6C isolates.
  • Antimicrobial susceptibility testing to determine multidrug resistance.

Main Results:

  • Serotype 6C accounted for 2.6% (106/4,064) of the studied carriage isolates.
  • 17.9% of serotype 6C isolates exhibited multidrug resistance.
  • The collected serotype 6C strains demonstrated considerable genetic diversity.

Conclusions:

  • Serotype 6C is an emerging cause of Streptococcus pneumoniae carriage in Portugal.
  • The multidrug resistance and genetic diversity of serotype 6C warrant further investigation and monitoring.
  • Findings emphasize the dynamic nature of pneumococcal epidemiology and the importance of tracking new serotypes.

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