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Invasive pneumococcal and meningococcal disease

Essential points for quick revision.

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Purpura, shock or meningitis

Non-blanching purpura, rapidly worsening fever, neck stiffness, confusion, capillary leak or shock can deteriorate over minutes even when an early rash is absent.

Action: Use ABCDE, obtain blood cultures and PCR without delaying ceftriaxone, manage sepsis and raised intracranial pressure, and contact critical care and health protection immediately. Do not wait for lumbar puncture, CT or a complete rash to treat suspected invasive disease.

Synopsis

Recognise fulminant pneumococcal and meningococcal sepsis or meningitis, start immediate ceftriaxone-based treatment, secure microbiological confirmation, notify health protection and prevent secondary meningococcal cases.

  • Meningococcal disease may present as septicaemia, meningitis or both; pneumococcus commonly causes meningitis, bacteraemic pneumonia and overwhelming sepsis.
  • Absence of rash does not exclude meningococcal disease, and a blanching early rash can evolve into purpura as coagulopathy develops.
  • Give ceftriaxone immediately for suspected invasive disease after cultures when this causes no material delay; use meningitis dosing when CNS infection is possible.

Key red flags

A non-blanching rash with fever or toxicity is meningococcal disease until urgent assessment proves otherwise.

Meningococcal septicaemia

Abrupt fever, severe myalgia, limb pain, mottling, purpura, shock and rapid capillary leak may occur before meningism.

Investigation priorities

01
Blood cultures and EDTA blood PCRFirst step

Confirm viable organism and preserve diagnosis after prior antibiotics.

Management branches

ASSESSTreat invasive disease immediately

Invasive meningococcal or pneumococcal disease is clinically suspected.

  1. Use ABCDE, capillary refill, lactate, urine output and neurological examination and involve critical care early for shock or altered consciousness.
  2. Take blood culture and PCR quickly, then give ceftriaxone at meningitis dose when CNS infection cannot be excluded.

Key medicines

Ceftriaxone for suspected invasive meningitisGive ceftriaxone 2 g intravenously every 12 hours in adults when bacterial meningitis is suspected.
Ceftriaxone for non-meningeal invasive infectionGive ceftriaxone 2 g intravenously once daily when invasive disease is severe but meningitis has been excluded.
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Sources and review status3 sources · checked 27 Aug 2026 · clinical review pending
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 27 Aug 2026; clinical approval remains outstanding.

Authoring stateRapid draftClinical stateAwaiting reviewJurisdictionUnited Kingdom