[Use of azithromycin in ORL]

Area of Science:

• Infectious Diseases
• Pharmacology
• Microbiology

Context:

• Beta-haemolytic streptococcal pharyngitis often requires prolonged antibiotic treatment (10 days).
• Standard antibiotic regimens involve multiple daily doses, leading to potential compliance issues.
• Azithromycin presents an alternative with a favorable pharmacokinetic profile.

Purpose:

• To evaluate the efficacy and tolerability of azithromycin for treating streptococcal pharyngitis.
• To compare azithromycin's clinical outcomes and bacterial eradication rates with standard treatments like Penicillin V.
• To assess the impact of azithromycin's dosing regimen on patient compliance.

Summary:

• Azithromycin exhibits potent in vitro activity against Streptococcus pyogenes (MIC90 of 0.06 mg/l).
• In vivo studies show azithromycin's efficacy comparable to amoxicillin in animal models.
• A 3-day regimen of 1.5g azithromycin results in high tonsillar concentrations for over 10 days.
• Clinical studies using a 5-day, 1.5g azithromycin regimen achieved results identical to Penicillin V groups for acute tonsillitis.

Impact:

• Improved patient compliance due to reduced dosing frequency.
• Potential reduction in treatment failures associated with prematurely discontinued therapy.
• Azithromycin offers a viable alternative for managing streptococcal pharyngitis, enhancing therapeutic adherence.