key term - Otitis externa

Definition

Otitis externa, commonly known as swimmer's ear, is an infection of the outer ear canal. It is often caused by bacterial infection and can result in pain, swelling, and redness.

5 Must Know Facts For Your Next Test

1. Pseudomonas aeruginosa and Staphylococcus aureus are the most common bacterial pathogens causing otitis externa.
2. Symptoms include ear pain, itching, discharge, and sometimes temporary hearing loss.
3. Risk factors include excessive moisture in the ear from swimming or bathing and mechanical injury from cotton swabs or hearing aids.
4. Diagnosis typically involves physical examination of the ear canal and may include swabbing for bacterial cultures.
5. Treatment usually involves topical antibiotics and sometimes corticosteroids to reduce inflammation.

Review Questions

Related terms

cellulitis:

A bacterial skin infection characterized by redness, swelling, warmth, and pain.

conjunctivitis:

Inflammation or infection of the outer membrane of the eyeball and inner eyelid.

impetigo:

A highly contagious skin infection that causes red sores on the face.