Meningococcal disease

Meningococcal disease is a term used to describe two major illnesses – meningitis and septicaemia* (blood poisoning). These can occur on their own or more commonly, both together. It is a life-threatening infection caused by Neisseria meningitidis. Men B is the most common strain in the UK, but other strains include MenA, MenC, MenW and MenY

Types and causes - meningococcal LB

Meningococcal strains (Men A, B, C, W & Y)

There are five main groups that commonly cause disease in the UK - MenA, MenB, MenC, MenW, MenY.

MenB causes the majority of the disease in the UK. 

How it is caused

  • Around 10% of the population carries meningococcal bacteria in the back of their throats at any given time. This is usually healthy carriage and helps develop immunity
  • Occasionally the bacteria defeat the body’s defences and cause infection
  • The bacteria are passed from person to person by coughing, sneezing and intimate kissing
  • The bacteria break through the lining at the back of the throat and pass into the bloodstream
  • They can travel in the bloodstream to infect the meninges, causing meningitis, or while in the bloodstream they can cause septicaemia

The facts about meningococcal disease

Download the meningococcal fact sheet.

How is it treated?

Meningococcal meningitis and septicaemia need urgent treatment with antibiotics and rapid admission to hospital. If treated promptly, meningitis and septicaemia are less likely to become life-threatening.


Meningococcal meningitis can leave people with after-effects, including:

You can read more in-depth information about the after-effects of meningitis in our fact sheets.

Meningococcal septicaemia

After-effects of meningococcal septicaemia

The toxins damage the blood vessels and reduce the flow of oxygen to the major organs including the skin and underlying tissues. This can lead to:

  • Skin and tissue damage
  • Bone growth problems
  • Organ failure
  • Limb loss
  • Death

*Many medical experts now use the term sepsis instead of septicaemia.

Can meningococcal disease be prevented?

Some groups of meningococcal disease can be prevented with vaccines. 

Find out more about current vaccines.

Read our MenB vaccine FAQs or download them here.

Read our MenACWY vaccine FAQs or download them here.

What happens next?

Most cases happen alone, and the likelihood of a second related case is extremely rare, but occasionally they can happen.

  • Management of the disease in the community is the responsibility of a doctor who specialises in the public health management of infectious diseases
  • The public health team (doctors and nurses) will visit the patient and their family in hospital in order to identify close contacts; these include household family members and intimate kissing contacts
  • Close contacts may be given antibiotics in order to reduce the risk of further cases. The antibiotics will kill any meningococcal bacteria being carried in the back of the throat, reducing the risk of further transmission
  • Close contacts may also be offered vaccination if a vaccine preventable group has been identified
  • Each situation will be individually assessed and appropriate action taken. For example, if a second case occurs within four weeks in the same nursery school, all children and staff will be offered antibiotics (and vaccination if appropriate)
  • The public health team will liaise with local GPs, relevant schools/nurseries or places of work to ensure good communication between all those concerned

Been affected by meningococcal disease?

Don’t face meningitis alone. Call our Meningitis Helpline on 0808 80 10 388 to speak to our experienced staff. You can access our free support or ask us any questions. Whatever your experience, whenever it was, please get in touch. Our support is for life.

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