Which organism is NOT commonly associated with acute otitis media?

Which organism is NOT commonly associated with acute otitis media?

• A. Moraxella catarrhalis
• B. Streptococcus pneumoniae
• C. Haemophilus influenzae
• D. Pseudomonas aeruginosa

Answer: (D)

Acute otitis media is most often caused by common nasopharyngeal pathogens that ascend to the middle ear—Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis. Pseudomonas aeruginosa is not a typical cause of AOM in healthy individuals; it’s more associated with otitis externa (swimmer’s ear) and with chronic ear conditions (such as with tympanostomy tubes or in certain immunocompromised or hospital-associated cases). So Pseudomonas is not commonly linked to acute otitis media.

Acute otitis media is most often caused by common nasopharyngeal pathogens that ascend to the middle ear—Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis. Pseudomonas aeruginosa is not a typical cause of AOM in healthy individuals; it’s more associated with otitis externa (swimmer’s ear) and with chronic ear conditions (such as with tympanostomy tubes or in certain immunocompromised or hospital-associated cases). So Pseudomonas is not commonly linked to acute otitis media.