Middle Ear Infection – Causes, Symptoms & Treatment
A middle ear infection (otitis media) is an inflammation of the middle ear, most commonly affecting children and caused by bacteria or viruses.
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A middle ear infection (otitis media) is an inflammation of the middle ear, most commonly affecting children and caused by bacteria or viruses.
What Is a Middle Ear Infection?
A middle ear infection, medically known as otitis media, is an inflammation of the middle ear – the space located behind the eardrum. It is one of the most common conditions in childhood but can also affect adults. The infection usually develops as a complication of an upper respiratory tract infection and may be acute or chronic in nature.
Causes
Middle ear infections are most commonly triggered by bacteria or viruses that travel from the nose and throat through the Eustachian tube into the middle ear. Common causes include:
- Bacteria such as Streptococcus pneumoniae or Haemophilus influenzae
- Viruses such as rhinoviruses (common cold viruses) or respiratory syncytial virus (RSV)
- Previous colds, flu, or allergies
- Enlarged adenoids that block drainage from the middle ear
In infants and young children, the Eustachian tube is shorter and more horizontal than in adults, making it easier for pathogens to reach the middle ear and increasing the risk of infection.
Symptoms
The symptoms of a middle ear infection can vary depending on the age of the person affected:
In Children
- Severe, often sudden-onset ear pain
- Irritability, crying, and sleep disturbances
- Fever (often above 38 °C / 100.4 °F)
- Tugging or pulling at the ear
- Hearing loss or reduced response to sounds
- Purulent or watery discharge from the ear (if the eardrum has ruptured)
In Adults
- Ear pain and a feeling of pressure in the ear
- Reduced hearing ability
- Tinnitus (ringing in the ears)
- General feeling of illness and occasional fever
Diagnosis
Diagnosis is typically made by a doctor using otoscopy – an examination of the ear canal and eardrum with an otoscope. The doctor may observe redness, bulging, or a perforation of the eardrum. Additional diagnostic tools include:
- Tympanometry: Measurement of eardrum mobility to assess a potential fluid buildup in the middle ear
- Audiometry: Hearing tests to detect hearing loss
- Swab culture: If there is ear discharge, a sample may be taken to identify the causative organism
Treatment
Treatment depends on the cause and severity of the condition:
Watchful Waiting
For mild to moderate cases, particularly in children over two years of age, clinical guidelines recommend an initial watchful waiting period of 48 to 72 hours, as many cases resolve on their own.
Pain Management
- Pain relievers such as ibuprofen or paracetamol (acetaminophen) to relieve pain and fever
- Warm compresses applied to the ear can help reduce discomfort
Antibiotics
Antibiotic treatment is recommended when:
- The child is under two years of age
- Symptoms are severe or affect both ears
- There is no improvement after 48 to 72 hours
- The eardrum has ruptured with visible discharge
The first-line antibiotic is usually amoxicillin. Alternative antibiotics are used in cases of penicillin allergy.
Surgical Treatment
For recurrent or chronic middle ear infections with persistent fluid buildup, insertion of tympanostomy tubes (ear tubes or grommets) into the eardrum may be recommended to allow fluid drainage and improve hearing.
Complications
Untreated or frequently recurring middle ear infections can lead to the following complications:
- Chronic middle ear effusion (glue ear)
- Permanent hearing loss
- Eardrum perforation
- Mastoiditis (infection of the mastoid bone behind the ear)
- In rare cases: meningitis or brain abscess
Prevention
- Vaccinations against pneumococcal bacteria and Haemophilus influenzae type b reduce the risk
- Breastfeeding infants lowers the risk of infection
- Avoiding exposure to secondhand smoke
- Good hand hygiene to prevent respiratory infections
References
- World Health Organization (WHO): Chronic suppurative otitis media. Burden of Illness and Management Options. Geneva, 2004.
- Lieberthal AS et al. - The Diagnosis and Management of Acute Otitis Media. Pediatrics. 2013;131(3):e964-e999.
- Qureishi A et al. - Update on otitis media - prevention and treatment. Infection and Drug Resistance. 2014;7:15-24.
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Related search terms: Middle Ear Infection + Middle-Ear Infection + Otitis Media