goodtoknow says: Meningitis and septicaemia often happen at the same time. The most common bacterial infection that can cause meningitis causes septicaemia too. Both can also be caused by viruses. Meningitis, which causes swelling in the brain, is rare as is septicaemia, blood poisoning. Viral meningitis, that normally affects adults, is usually milder than bacterial which often affects children. Common symptoms of bacterial meningitits include a rash that doesn't fade when pressed, aching legs, headache, stiff neck and dislike of bright light and noise. Vaccines are now available to prevent some forms of bacterial meningitis.

For a full medical explanation of the causes, symptoms and treatments of meningitis or septicaemia from patient.co.uk, read on.

- Next: Read about the symptoms

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• Next: Meningitis and septicaemia: the symptoms

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