זיהום מנינגוקוקלי

Meningococcal infection is one of the most common causes of bacterial meningitis. If you suspect דלקת קרום המוח או אלח דם -get medical help immediately by calling for an emergency ambulance (999 in the UK).

What is meningococcal infection?

Meningococcal infection refers to any illness caused by a germ (bacterium) called Neisseria meningitidis.

Neisseria meningitidis (meningococcus) is common, living harmlessly in the nose and throat of about 1 in 4 people. However, rarely, meningococcus can spread and cause severe infection. This is called invasive meningococcal disease.

Meningococcal diseases include infections of the lining of the brain and spinal cord (דלקת קרום המוח), and of the bloodstream and blood vessels (אלח דם).

Types of meningococcal infection

Meningococcal germs (bacteria) are divided into several groups (types or strains):

• Groups B, C and, more recently, W are the common strains in the UK. Most cases of bacterial דלקת קרום המוח in the UK are caused by group B. Most of the rest are caused by group C (although the number of group C cases has fallen greatly due to immunisation introduced in 1999). Infection caused by group W has increased in the UK in recent years.

• Group A is rare in the UK but more common in certain parts of the world - in particular, sub-Saharan Africa and parts of Saudi Arabia.

• Groups Y, 29E and Z are rare in the UK but group W has been the cause of several recent outbreaks in different parts of the world, including the UK.

How common is meningococcal infection?

Meningococcal infection is very rare. There were 525 cases of meningococcal disease (IMD) in England in 2018/19 compared with 754 cases in 2017/18.. About 2,500 people in the UK have bacterial meningitis each year.

It can affect anyone, at any age. However, children under the age of 5 years (especially babies) are the most at risk. The second most common age group at risk is teenagers aged 15 to 19.

How do you get meningococcal infection?

Meningococcal germs (bacteria) live harmlessly in the noses and throats of about 1 in 4 people. These people are called carriers. Meningococcal bacteria do not survive outside the body. Close contact is needed to pass them on to others, such as intimate kissing, coughing, or sneezing near to others.

Rarely, this germ (bacterium) overcomes the body's immune system and gets into the blood to cause meningitis and/or blood poisoning (septicaemia). It is not clear why a few people are prone to serious illness and many other people are carriers of the same bacterium but experience no ill effects.

Most cases of meningococcal infection are isolated cases. The risk of others catching it are low, as many people are carriers and/or have natural immunity. Sometimes small outbreaks occur when two or more people in the same household or community are affected.

What are the symptoms of meningococcal infection?

One or more of the following symptoms may occur:

הערה: not all symptoms may occur. For example, the classic symptoms of neck stiffness and rash may not occur. If you suspect meningitis or septicaemia - call for an emergency ambulance immediately (999 in the UK).

תסמינים מוקדמים נפוצים

Many children who are developing meningitis or septicaemia have nonspecific symptoms such as just feeling or looking generally unwell. These symptoms may include having a חום גבוה (חום), being more tired than usual and feeling sick.

עם זאת, שלושה תסמינים שמתפתחים לעיתים קרובות בשלב מוקדם - לעיתים לפני התסמינים הקלאסיים המפורטים בהמשך - הם:

• כאבים ברגליים. הכאבים עלולים להחמיר ולמנוע מהילד לעמוד או ללכת.

• ידיים או רגליים קרות - גם אם לילד יש חום גבוה.

• צבע חיוור, כהה או כחול של העור סביב השפתיים.

Rash - commonly occurs, but not always

A typical rash is common with meningococcal infection. The rash is red or purple.

Small spots develop at first and may occur in groups anywhere on the body. They often grow to become blotchy and look like little bruises. One or two may develop at first but many may then appear in different parts of the body. The rash can be hard to see on dark skin. Check paler areas like the palms of the hands and the soles of the feet.

The spots/blotches do not fade when pressed (unlike many other rashes). To check for this, do the glass test. Place a clear glass firmly on one of the spots or blotches. If the spot/blotch does not fade and you can still see it through the glass, get medical help immediately.

The rash is a sign of אלח דם. ייתכן שהוא לא יופיע בדלקת קרום המוח בלבד.

Other symptoms to look out for include the following.

תסמינים נוספים שעשויים להופיע בתינוקות

• בכי מוגזם - לעיתים קרובות בקול גבוה או מתלונן ושונה מהבכי הרגיל שלהם.

• Fast breathing, or unusual patterns of breathing.

• Fever - but the baby may not look hot and the skin may look pale or blotchy, or turn blue. The hands and feet may feel cold. The baby may shiver.

• לא לוקח הזנה - לפעמים מקיא שוב ושוב.

• להיות עצבני - במיוחד כאשר מרימים ומטפלים.

• Drowsiness or sleepiness - does not wake easily.

• A bulging fontanelle sometimes develops. The fontanelle is the soft spot on the baby's head.

• Jerky movements may occur and the body may appear stiff. Sometimes the opposite occurs and the body appears quite floppy. Fits or seizures (convulsions) sometimes develop.

תסמינים נוספים שעשויים להופיע אצל ילדים גדולים יותר ומבוגרים

כוללים:

• חום ורעידות - עם זאת, לעיתים קרובות הידיים והרגליים מרגישות קרות.

• Stiff neck - cannot bend the neck forwards.

• כאב ראש - שיכול להפוך לחמור.

• נשימה מהירה.

• כאבים ודלקות בשרירים או במפרקים - הכאבים יכולים להיות חמורים למדי.

• העור עשוי להיראות חיוור או מנוקד, או להפוך לכחול.

• אי אהבה לאורות בהירים - יסגור עיניים ויפנה מהאור.

• נמנום או בלבול - עשוי להיראות ריק.

• Repeated vomiting. Sometimes tummy (abdominal) pain and diarrhoea.

How quickly do symptoms develop?

The symptoms usually develop quickly, over a few hours or so. Symptoms can occur in any order and not all may occur. Sometimes symptoms develop more slowly, over a few days.

The symptoms may suggest a less serious illness at first. For example, fever, headaches and vomiting are common with many viral illnesses such as flu. Therefore, even if you think it was flu to start with, if symptoms become worse then it may be meningitis or septicaemia. See also the separate leaflet called Meningitis symptoms checklist.

If you suspect meningitis or septicaemia - call an emergency ambulance immediately (999 in the UK).

מהם דלקת קרום המוח ואלח דם?

• Meningitis is an inflammation of the lining that covers the brain and spinal cord (the meninges). Bacterial or viral infection is the usual cause. Bacterial meningitis is uncommon but serious. Viral meningitis is quite common but much less serious than a bacterial cause.

• Septicaemia is an infection of the blood with bacteria. It is often called 'blood poisoning'. If bacteria multiply and release poisons (toxins) into the blood it can cause serious illness and death.

Meningococcus typically causes meningitis and אלח דם at the same time.

What is the treatment for meningococcal infection?

Treatment for meningococcal infection include the following:

Antibiotic injection

Antibiotic injections are needed urgently. High doses are usually given. The person will need admitting to hospital - if they are very unwell then they will go to a high dependency or intensive care ward, as the infection often causes shock and problems throughout the body.

Spinal tap (lumbar puncture)

In an ideal world a spinal tap (lumbar puncture) would be done before treating, so that some fluid from the spinal cord (cerebrospinal fluid) can be sent to the lab to try to grow the germ (bacterium), but often the need for antibiotics is so urgent that these are given first.

Can meningococcal infection be prevented?

חיסון

Children are routinely immunised against certain causes of meningitis. These include Haemophilus influenzae type B (Hib), group C meningococcus, pneumococcus and mumps. Immunisation against group B meningococcus (MenB®) was introduced in September 2015.

From August 2015 a vaccine against types A, C, W and Y (MenACWY®) is given to all those aged 17-18 and new university/college students under 25. It will also be given to those aged 14-15 in place of the meningitis C vaccine they currently receive. Other vaccines may be used for travellers going to meningitis-prone countries.

Vaccines are not yet available for other causes of meningitis.

Read more about חיסון נגד מנינגוקוק.

Close contacts

Close contacts of a person with meningococcal infection have an increased risk of developing the illness. However, the risk is still low. 'Close contacts' usually means household members or intimate kissing contacts within the previous seven days. These people are offered a short course of antibiotics to prevent possible infection.

If group C meningococcus is the cause, immunisation is usually also offered to close contacts. Occasionally, an outbreak of two or more cases of meningococcal infection occurs in the same school, college or similar community. Antibiotics and/or immunisation may then be offered to a wider group of people.

What is the prognosis for meningococcal infection?

The outlook (prognosis) often depends on how soon antibiotics are given after the illness starts. Most people make a good recovery if treated early enough. However, without treatment, most people will die.

A difficulty is that meningococcal infection can develop very quickly and can mimic other illnesses when symptoms first begin. Treatment may be delayed if the cause of early symptoms is not clear at first. In some cases a person can be well in the morning, develop flu-like symptoms by the afternoon and be critically ill or dead by the evening.

According to the National Institute for Health and Care Excellence (NICE), in the UK 4-25% of children and 25% of adults with acute bacterial meningitis will die. Of those who survive, some are left with some permanent brain damage, deafness or amputation of one or more limbs. Death rates may be higher if septicaemia occurs.