Pneumococcal resistance to antibiotics.

Area of Science:

• Microbiology
• Infectious Diseases
• Antimicrobial Resistance

Background:

• The prevalence of antibiotic resistance in Streptococcus pneumoniae (pneumococci) is a growing global health concern.
• Resistant pneumococci, including multidrug-resistant strains, are increasingly identified in community-acquired infections.

Purpose of the Study:

• To describe the expanding geographic distribution and characteristics of antibiotic-resistant pneumococci.
• To identify factors associated with infections caused by resistant pneumococci and outline management and control strategies.

Main Methods:

• Review of existing data on pneumococcal resistance patterns.
• Identification of risk factors for infection with resistant strains.
• Evaluation of current and alternative therapeutic agents and control measures.

Main Results:

• Expanding geographic distribution of resistance to penicillin, erythromycin, trimethoprim-sulfamethoxazole, and tetracycline; foci of chloramphenicol and rifampin resistance exist.
• Multiply resistant pneumococci are more common and often community-acquired.
• Factors linked to resistant infections include young age, hospitalization duration, specific serogroups/serotypes, and prior antibiotic exposure.

Conclusions:

• Effective management of resistant pneumococcal infections relies on cefotaxime, ceftriaxone, vancomycin, and rifampin; chloramphenicol is a less expensive alternative if susceptible.
• Control strategies include surveillance, patient isolation, carrier treatment, and judicious antibiotic use.
• Understanding molecular mechanisms of resistance is crucial for combating resistant pneumococci.