Acute Otitis Media
A common bacterial or viral infection of the middle ear, mostly seen in young children, causing ear pain, fever, and a bulging eardrum.
Emergency Management: Mastoiditis requires immediate hospital admission, IV antibiotics (e.g., Ceftriaxone), and urgent ENT consultation for potential mastoidectomy.
Acute otitis media (AOM) is an acute symptomatic bacterial or viral infection of the middle ear space, characterized by rapid onset of signs and symptoms of inflammation, accompanied by middle ear effusion (MEE). It is a leading cause of pediatric healthcare visits and antibiotic prescriptions.
Detailed Overview
AOM typically follows a viral upper respiratory infection (URI) which causes mucosal inflammation and edema of the respiratory tract. This edema impairs the mucociliary clearance of the Eustachian tube, causing it to obstruct. Negative pressure develops in the middle ear, drawing in secretions and nasopharyngeal pathogens (bacteria or viruses). The accumulation of purulent fluid in the closed middle ear space leads to the classic bulging tympanic membrane and ear pain. Frequent, severe, or untreated infections can lead to complications such as tympanic membrane perforation, conductive hearing loss, or extension of infection into the mastoid bone.
Epidemiology & Demographics
Highly prevalent in childhood; over 80% of children experience at least one episode by age 3. Peak incidence occurs between 6 and 24 months of age. More common in males and during winter months.
Etiological Mechanism
Most commonly caused by bacterial pathogens from the nasopharynx. The "big three" are Streptococcus pneumoniae (approx. 35-40%), non-typeable Haemophilus influenzae (approx. 30%), and Moraxella catarrhalis (approx. 15%). Viral co-infection (RSV, rhinovirus, adenovirus) is present in up to 66% of cases.
Primary Causes
Streptococcus pneumoniae
Haemophilus influenzae
Moraxella catarrhalis
Respiratory syncytial virus (RSV)
1. A viral URI induces nasopharyngeal mucosal swelling. 2. Swelling obstructs the isthmus of the Eustachian tube. 3. Gas in the middle ear is absorbed, creating negative pressure. 4. Negative pressure aspirates pathogen-laden secretions from the nasopharynx into the middle ear. 5. Pathogens proliferate in the sterile middle ear space, triggering an acute inflammatory response. 6. Neutrophil infiltration and exudate formation result in middle ear effusion (MEE) and increased pressure, stretching the tympanic membrane and causing pain.
Diagnostic Criteria & Guidelines
AAP Guidelines require: 1. Moderate to severe bulging of the tympanic membrane OR new onset of otorrhea not due to acute otitis externa. OR 2. Mild bulging of the TM AND recent onset of ear pain (holding/tugging) or intense erythema of the TM.
1. Analgesia: Ibuprofen 10 mg/kg/dose PO q6-8h or Acetaminophen 15 mg/kg/dose PO q4-6h. 2. Observation Option: In healthy children >6 months with non-severe, unilateral AOM, a 48-72 hour observation period is acceptable. 3. First-line Antibiotic: High-dose Amoxicillin 90 mg/kg/day PO divided BID for 5-10 days (covers S. pneumoniae).
Second-Line & Adjunctive Therapy
If clinical failure at 48-72 hours or if child has taken amoxicillin in the past 30 days or has concurrent purulent conjunctivitis (suggestive of H. influenzae): Amoxicillin-clavulanate 90 mg/kg/day of amoxicillin component PO divided BID. For penicillin allergy: Cefdinir 14 mg/kg/day PO or Azithromycin.
Surgical & Procedural Management
Tympanostomy tube placement (myringotomy with tube insertion) is indicated for recurrent AOM (3 episodes in 6 months or 4 in 1 year) to provide continuous ventilation and drainage of the middle ear.
Patient Counseling & Advice
Educate parents that ear pain must be managed actively with pain relievers, as antibiotics take 24-48 hours to reduce pain. Explain the rationale for observation in mild cases to prevent antibiotic resistance.
Follow-Up & Monitoring Schedule
Re-evaluation if symptoms do not improve in 48-72 hours. Routine follow-up in 8-12 weeks to document clearance of middle ear effusion, especially to monitor for hearing loss.
Preventive Strategies
Pneumococcal conjugate vaccine (PCV13/PCV15) and annual influenza vaccination significantly reduce the incidence of AOM.
Excellent. Most cases resolve completely without permanent hearing damage. 80% of cases resolve spontaneously without antibiotics.