Antibacterial resistance among children with community-acquired respiratory tract infections (PROTEKT 1999-2000)

Area of Science:

• Pediatric Infectious Diseases
• Microbiology
• Pharmacology

Background:

• Antibiotic resistance in pediatric respiratory pathogens is a significant clinical challenge.
• The global PROTEKT surveillance study monitored antimicrobial susceptibility from 1999-2000.
• Understanding resistance patterns is crucial for effective empirical treatment.

Purpose of the Study:

• To assess the susceptibility of key pediatric respiratory bacterial pathogens to various antibiotics.
• To evaluate the efficacy of the ketolide telithromycin against these pathogens.
• To identify emerging resistance trends in Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis, and Streptococcus pyogenes.

Main Methods:

• Minimum inhibitory concentrations (MICs) were determined using the NCCLS microdilution broth method.
• Polymerase chain reaction (PCR) was employed to detect macrolide resistance mechanisms.
• Isolates were collected globally as part of the PROTEKT surveillance study (1999-2000).

Main Results:

• High rates of non-susceptibility to penicillin (43%) and erythromycin (37%) were observed in Streptococcus pneumoniae.
• Beta-lactamase production was prevalent in Haemophilus influenzae (18%) and Moraxella catarrhalis (>90%).
• Telithromycin demonstrated high in vitro activity, with all tested S. pneumoniae and M. catarrhalis isolates susceptible at low concentrations.

Conclusions:

• Antibiotic resistance necessitates ongoing surveillance and complicates empirical therapy for pediatric respiratory infections.
• Telithromycin exhibits potent activity against a broad spectrum of pediatric respiratory pathogens, including resistant strains.
• Telithromycin represents a promising therapeutic alternative for treating childhood respiratory tract infections.