Final answer:
The most likely organism in a 2-year-old child with acute otitis media is Streptococcus pneumoniae.
Step-by-step explanation:
The most likely organism in a 2-year-old child with acute otitis media is Streptococcus pneumoniae. In older infants and children younger than 14 years old, the most common bacterial causes of AOM are S. pneumoniae, Haemophilus influenzae, or Moraxella catarrhalis. Among neonates, S. pneumoniae is also a common cause of AOM.