Antimicrobial Resistance in Streptococcus pneumoniae before and after the Introduction of Pneumococcal Conjugate...

Area of Science:

• Microbiology
• Epidemiology
• Vaccinology

Background:

• Streptococcus pneumoniae causes severe infections like pneumonia, bacteremia, and meningitis, particularly in vulnerable populations.
• Pneumococcal conjugate vaccines (PCVs) are the primary defense against pneumococcal infections.
• Antimicrobial resistance in Streptococcus pneumoniae is an evolving challenge, even after PCV implementation in Brazil since 2010.

Purpose of the Study:

• To systematically review and analyze antimicrobial susceptibility data for Streptococcus pneumoniae isolates in Brazil.
• To compare pneumococcal susceptibility patterns before and after the widespread introduction of PCVs.
• To assess the ongoing threat of antimicrobial resistance in the context of vaccination programs.

Main Methods:

• Systematic literature review adhering to Cochrane Handbook and PRISMA guidelines.
• Analysis of studies published since 2000 focusing on Streptococcus pneumoniae susceptibility.
• Comparison of susceptibility data from isolates causing colonization and invasive diseases.

Main Results:

• High rates of non-susceptibility to key antibiotics, including penicillin, persist despite large-scale PCV use.
• Increasing resistance to macrolides among Streptococcus pneumoniae isolates is a notable trend.
• Certain antimicrobial agents still demonstrate comprehensive sensitivity against pneumococci.

Conclusions:

• Widespread PCV implementation in Brazil has not eradicated the challenge of antimicrobial resistance in Streptococcus pneumoniae.
• Continued surveillance of antimicrobial susceptibility is essential for effective pneumococcal disease management.
• The evolving resistance patterns necessitate ongoing evaluation of treatment strategies and vaccine efficacy.