Chapter 17: Otitis Media & Otitis Externa – Ear Infection Therapy

AOM is an acute onset middle ear infection and inflammation, primarily affecting young children due to anatomical predisposition causing eustachian tube dysfunction, and is often triggered by viral URIs. The main bacterial culprits include Streptococcus pneumoniae, nontypable Haemophilus influenzae, and Moraxella catarrhalis, with pathogen prevalence shifting following the implementation of the pneumococcal conjugate vaccine (PCV). Therapeutic goals for AOM focus on symptomatic pain relief, utilizing analgesics like ibuprofen or acetaminophen, and judicious use of antibiotics. High-dose amoxicillin is the standard first-line treatment; however, amoxicillin-clavulanate or specific cephalosporins are indicated for patients with recent amoxicillin exposure, penicillin allergy, or treatment failure due to resistance concerns. In contrast, OME involves non-infectious fluid accumulation behind the tympanic membrane without signs of acute inflammation, meaning antibiotics are inappropriate, although chronic cases leading to hearing difficulties may warrant tympanostomy tubes. Otitis Externa, commonly known as swimmer’s ear, is inflammation of the outer ear canal frequently associated with water exposure or trauma, and is typically caused by Pseudomonas aeruginosa or Staphylococcus aureus. Unlike AOM, OE is primarily managed using ototopical antimicrobial drops, such as fluoroquinolones (ciprofloxacin or ofloxacin), which achieve high local concentration while reducing systemic side effects, although oral antibiotics are required if the infection extends beyond the ear canal or if the patient is immunocompromised. Key preventative strategies for AOM involve adhering to the routine childhood immunization schedule, including PCV-13, HiB, and influenza vaccines.