Antimicrobial treatment of sinusitis

Area of Science:

• Infectious Diseases
• Otolaryngology
• Microbiology

Background:

• Sinusitis is a prevalent condition, frequently following viral upper respiratory infections.
• Acute sinusitis commonly affects the maxillary sinus, with Streptococcus pneumoniae and Haemophilus influenzae as primary pathogens.
• Moraxella (Branhamella) catarrhalis is a key pathogen in pediatric sinusitis, while anaerobic infections dominate chronic cases.

Purpose of the Study:

• To review the common pathogens, clinical presentations, and treatment strategies for sinusitis.
• To highlight the challenges posed by beta-lactamase-producing bacteria and nosocomial infections.
• To discuss appropriate antimicrobial choices based on pathogen resistance patterns.

Main Methods:

• Literature review of sinusitis epidemiology, microbiology, and therapeutic outcomes.
• Analysis of pathogen prevalence in acute, chronic, and nosocomial sinusitis.
• Evaluation of antimicrobial efficacy against common and resistant sinusitis pathogens.

Main Results:

• Common sinusitis pathogens include Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis.
• Beta-lactamase production by H. influenzae and M. catarrhalis necessitates specific antibiotic choices.
• Nosocomial sinusitis, often seen in ICUs, involves gram-negative bacilli or staphylococci requiring broad-spectrum agents.

Conclusions:

• Antimicrobial therapy for sinusitis should consider pathogen susceptibility, especially beta-lactamase production.
• Trimethoprim-sulfamethoxazole, tetracyclines, and cefuroxime axetil are effective against many resistant strains.
• Management of nosocomial sinusitis requires broad-spectrum antibiotics like penicillins, cephalosporins, or vancomycin.