Prophylaxis for recurrent acute otitis media: a Brazilian study

Area of Science:

• Pediatrics
• Infectious Diseases
• Pharmacology

Background:

• Recurrent acute otitis media (AOM) is a common childhood infection.
• Antimicrobial prophylaxis is a potential strategy to reduce AOM recurrence.
• Previous studies have shown mixed results on the efficacy of prophylaxis.

Purpose of the Study:

• To evaluate the effectiveness of antimicrobial prophylaxis in preventing recurrent AOM in children.
• To compare the efficacy of trimethoprim-sulfamethoxazole (TMP-SMX) and amoxicillin (AMX) for AOM prophylaxis.
• To determine if prophylaxis influences the timing of AOM recurrence.

Main Methods:

• A randomized controlled trial involving 60 children with recurrent AOM.
• Children received either TMP-SMX, AMX, or placebo (PLA) once daily for 3 months at 1/3 therapeutic dose.
• Pneumootoscopy and impedance tympanometry (TYMP) were used for monthly evaluations and during acute illness.

Main Results:

• A significantly higher rate of recurrent AOM was observed in the placebo group (50%) compared to antibiotic groups (17%, P < 0.005).
• Both TMP-SMX (20% recurrence) and AMX (15% recurrence) were equally effective in preventing recurrent AOM.
• Recurrences in the placebo group occurred earlier than in the antibiotic prophylaxis groups.

Conclusions:

• Antimicrobial prophylaxis is effective in reducing the incidence of recurrent AOM in children.
• TMP-SMX and AMX demonstrate similar efficacy for preventing recurrent AOM.
• The findings support the use of antimicrobial prophylaxis, with cost-effectiveness favoring the less expensive agent.