Ophthalmology · Conjunctiva Disorders

Which organism is the MOST common cause of acute bacterial conjunctivitis in children?

  • A Staphylococcus aureus
  • B Pseudomonas aeruginosa
  • C Streptococcus pneumoniae
  • D Haemophilus influenzae (nontypeable)
Correct answer: D. Haemophilus influenzae (nontypeable)

Explanation

Nontypeable Haemophilus influenzae is the most common cause of acute bacterial conjunctivitis in children, particularly those under 6 years, often concurrent with otitis media. Streptococcus pneumoniae is also common in children. Staphylococcus aureus predominates in adults. Pseudomonas is associated with contact lens wear and corneal involvement, not routine paediatric conjunctivitis.

Reference: Nelson Textbook of Pediatrics / Parson's Diseases of the Eye, Standard ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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