CNS Infections — Viva Defence

Opening statement (SASPOP, delivered aloud)

"Mr Nguyen is a 46-year-old man, three weeks post pneumococcal meningitis complicated by seizures and ICU care, presenting with new hearing difficulty. His main problems are: recovering from a severe CNS infection with neurological sequelae; determining whether an underlying susceptibility exists; secondary prevention through vaccination; and rehabilitation of his hearing. My plan is to complete a complications screen, investigate immune susceptibility, vaccinate, and coordinate his recovery." [1]

Structured problem list

1. Post-meningitis neurological sequelae — seizures during the illness (now resolved); new hearing difficulty, which may be sensorineural hearing loss, the signature late complication [1].
2. Underlying susceptibility to pneumococcal disease — asplenia, complement deficiency, immunoglobulin deficiency, chronic disease; none yet excluded [3].
3. Secondary prevention — vaccination strategy once his course is clear.
4. Rehabilitation and return to function — hearing, cognition, driving restrictions after seizures, psychological recovery.

Integrated management plan

• Complications screen: formal audiology for the hearing loss (sensorineural loss after bacterial meningitis is common and permanent management may follow), cognitive screen, and review of his seizure status with driving advice [1].
• Susceptibility workup: immunoglobulins and subclasses, complement pathway studies, HIV test, and assessment for asplenia (film for Howell-Jolly bodies, abdominal ultrasound if suggested) [3].
• Vaccination: pneumococcal (conjugate then polysaccharide per schedule), meningococcal, Hib and influenza — framed around any susceptibility found; if asplenic, add antibiotic standby education.
• Recovery coordination: audiology, neurology follow-up for seizures, staged return to work, and clear documentation of the illness for his GP.

Probing questions with model answers

"Why did you give dexamethasone, and does timing matter?" — "The European trial showed dexamethasone 10 mg four times daily for four days, started with or before the first antibiotic dose, reduced death and unfavourable outcome in community bacterial meningitis — with benefit concentrated in pneumococcal disease, which is exactly his organism. Started late, it is ritual rather than evidence" [2].

"Would you have done a CT before his LP?" — "Only if one of the Hasbun criteria applied: immunocompromise, prior CNS disease, seizure within the week, papilloedema, abnormal consciousness or focal deficit. He seized in the emergency department, so yes — but after cultures, antibiotics and steroids, never before them" [1].

"His brother asks if the family needs antibiotics." — "Pneumococcal meningitis does not require contact chemoprophylaxis — that obligation belongs to meningococcal disease. I would explain that, and use the conversation to reinforce the family's own vaccination where indicated" [3].

"What if this had been meningococcus instead?" — "Then notification and chemoprophylaxis for close contacts — household, kissing, secretion exposure — with ciprofloxacin or rifampicin per local guidance, and I would screen him later for complement deficiency, which classically predisposes to recurrent meningococcal disease" [3].

Communication points

• Explain hearing loss honestly: it may be permanent, and early audiology changes options.
• Answer "why me?" with the susceptibility plan — it converts anxiety into a concrete workup.
• Driving and seizure rules must be explicit in writing at discharge [1].