Which prophylactic treatment is recommended for otitis externa in patients with repeated water exposure?

Which prophylactic treatment is recommended for otitis externa in patients with repeated water exposure?

• A. Topical antibiotic drops
• B. Oral antibiotics
• C. Topical alcohol-acetic acid drops
• D. Saline ear drops

Answer: (C)

Prophylaxis for recurrent otitis externa in people who regularly get water in the ear relies on keeping the ear canal dry and slightly acidic, which discourages bacteria and fungi from growing in the moist environment. Topical drops that combine alcohol and acetic acid do this effectively: alcohol helps evaporate residual moisture, and acetic acid lowers the pH, creating an inhospitable environment for organisms like Pseudomonas and Staphylococcus. A few drops after swimming or bathing act as a preventive measure by maintaining a dry, acidic canal. Topical antibiotic drops are used to treat existing infections, not as routine prevention. Oral antibiotics aren’t the typical preventive strategy for this condition, and saline drops don’t provide the antimicrobial drying effect needed to reduce recurrence.

Prophylaxis for recurrent otitis externa in people who regularly get water in the ear relies on keeping the ear canal dry and slightly acidic, which discourages bacteria and fungi from growing in the moist environment. Topical drops that combine alcohol and acetic acid do this effectively: alcohol helps evaporate residual moisture, and acetic acid lowers the pH, creating an inhospitable environment for organisms like Pseudomonas and Staphylococcus. A few drops after swimming or bathing act as a preventive measure by maintaining a dry, acidic canal.

Topical antibiotic drops are used to treat existing infections, not as routine prevention. Oral antibiotics aren’t the typical preventive strategy for this condition, and saline drops don’t provide the antimicrobial drying effect needed to reduce recurrence.