Encephalitis: Care Staff Guide to Brain Inflammation

Encephalitis is a rare but serious condition in which the brain becomes inflamed and swollen. It can be life-threatening and needs urgent hospital care, so the ability to recognise the warning signs and act quickly matters enormously for anyone who supports vulnerable people. This guide, based on NHS information, explains the symptoms, causes, treatment and long-term effects of encephalitis, and what care and support staff should do. It links to our guides on delirium screening with the 4AT and epilepsy awareness, because confusion and seizures are key warning signs.

What is encephalitis?

The NHS describes encephalitis as an uncommon, serious condition in which the brain becomes swollen or inflamed. Anyone can be affected, though the NHS says the very young and the very old are most at risk. It is not contagious between people, even though some of the infections that cause it can spread.

Symptoms

The NHS explains that early symptoms are often flu-like, with a high temperature and headache. More serious symptoms can develop over hours to weeks, and these include:

• confusion or disorientation
• seizures or fits
• changes in personality or behaviour
• trouble speaking
• weakness or loss of movement in parts of the body
• loss of consciousness

In care settings, a new change in behaviour or a sudden confusion may be put down to a urinary infection, dementia or a bad night. This is one reason to look at the whole picture, particularly where a person also has a fever and headache. Sudden confusion is called delirium when it develops over hours or days, and it always needs a cause to be sought, so a clinical assessment should not be delayed.

When to call 999

The NHS is clear: call 999 immediately if serious symptoms appear in you or someone else. Do not wait to see whether the person improves, and do not delay while you look for other explanations. Stay with the person, note when the symptoms began, and pass this information on to the ambulance crew.

What causes encephalitis?

According to the NHS, the cause is often not known. Known causes include viruses, such as herpes simplex and, rarely, chickenpox, and the immune system wrongly attacking the brain. Bacterial or fungal infections are much rarer causes. Some infections that can lead to encephalitis are spread by mosquitoes, ticks or animals, such as rabies.

Treatment in hospital

The NHS says treatment is given in hospital and that earlier treatment improves outcomes. What is given depends on the cause and may include antiviral medicines, steroids, treatments to control the immune system, antibiotics or antifungals. Supportive care includes pain relief, fever control, seizure medicine and breathing support if needed. A hospital stay can last from days to months.

Outlook and long-term effects

The NHS notes that some people recover fully, although recovery can be long and difficult, and that many people are left with lasting brain damage. Long-term effects can include memory loss, ongoing seizures, changes in personality or behaviour, problems with attention, planning and problem-solving, and persistent tiredness.

Many people who return home or move into residential care after encephalitis therefore need ongoing support. Our guide to acquired brain injury in care home residents covers many of the practical issues, including memory, behaviour and fatigue.

Supporting people after encephalitis

• Follow the rehabilitation plan. Therapists will set goals for memory, mobility and communication. Reinforce them in daily routines.
• Use routines and prompts. Consistent routines, written reminders and a calm environment can help with memory and planning.
• Manage fatigue. Plan activities around energy levels and allow rest.
• Understand behaviour change. Changes in personality are part of the condition, not a choice. Respond with patience and avoid blame.
• Support seizure safety. If seizures are a risk, follow the person's epilepsy care plan.
• Support families. The NHS notes that support is available for patients and their families, and staff can help them find it.

Reporting and handover

Because encephalitis can develop quickly, clear communication between shifts is essential. Record when the person was last well, which symptoms you have seen and when, any temperature readings, and whether there has been a seizure or a fall. If you phone 999, give these details at once, and make sure that the ambulance crew know about any existing conditions, medicines and the person's usual level of confusion or communication. Afterwards, tell the person's family or representative as soon as possible and follow your organisation's incident and duty of candour procedures where relevant.

Frequently asked questions

Is encephalitis the same as meningitis?

No. Encephalitis is inflammation of the brain itself. Both are medical emergencies, and symptoms can overlap, so any suspected case needs urgent medical help.

Can someone recover completely?

The NHS says some people do recover fully, but many have lasting effects, so recovery plans should be individual.

Is encephalitis contagious?

The NHS says it is not contagious between people.

Where can staff build their knowledge?

The health and social care learning available through Learnsignal CPD can help you recognise and respond to medical emergencies.

This article is general information for care staff, based on NHS information, and does not replace the advice of a person's own clinicians. If you are worried about someone's health right now, contact their GP, NHS 111 or, in an emergency, call 999.