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Gonococcal Arthritis — RACP Paediatrics MCQ

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HardInfectious DiseaseGonococcal ArthritisRACP Paediatrics

A 14-year-old girl presents with a painful swollen knee. She has been sexually active. Joint aspiration shows purulent fluid with intracellular Gram-negative diplococci. What is the most likely diagnosis?

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Correct answer: A — Gonococcal septic arthritis

Gonococcal arthritis should be considered in any sexually active adolescent with septic arthritis. Intracellular Gram-negative diplococci on Gram stain are characteristic of Neisseria gonorrhoeae. Treatment includes IV ceftriaxone. STI screening and contact tracing are essential.

Reference: Therapeutic Guidelines – 2024 – Antibiotic: Sexually Transmitted Infections