Listeriosis
Listeriosis is a rare infection caused by bacteria called listeria. It usually goes away on its own, but it can make some people seriously ill.
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Medicines commonly prescribed for Listeriosis
For informational purposes only. Always consult a doctor before using any medicine.
Dosage form: TABLET, 500 mgActive substance: amoxicillinManufacturer: Almus Farmaceutica S.A.U.Prescription requiredDosage form: INJECTABLE, -Active substance: amoxicillinManufacturer: Ldp Laboratorios Torlan S.A.Prescription requiredDosage form: CAPSULE, 500 mgActive substance: amoxicillinManufacturer: Laboratorios Alter S.A.Prescription required
Listeriosis is a rare infection caused by bacteria called listeria. It usually goes away on its own, but it can make some people seriously ill.
How you get listeriosis
Listeriosis is usually caused by eating food contaminated with listeria bacteria.
Listeria can contaminate a wide range of foods, but most infections are caused by eating chilled, ready-to-eat foods, such as:
- cold, cooked sliced meats and cured meats
- smoked and cured fish – including in sushi
- cooked shellfish
- soft mould-ripened cheeses (such as camembert and brie) and blue-veined cheeses
- pâté
- pre-prepared sandwiches and salads
- pre-cut fruit (such as pre-packed melon slices)
- unpasteurised milk
- dairy products made from unpasteurised milk
These foods do not always contain listeria. If you have eaten them recently, you do not need to do anything unless you get symptoms of the infection.
Although it's less common, you can also catch listeriosis from:
- someone else who has it – for example, if you eat food they've handled when they've not washed their hands
- close contact with farm animals – especially sheep and cows that are giving birth
Symptoms of listeriosis
In most people, listeriosis has no symptoms or only causes mild symptoms for a few days, such as:
- a high temperature
- aches and pains
- chills
- feeling or being sick
- diarrhoea
If you're pregnant, you may also have a stomach ache or notice your baby moving less than usual.
Babies with listeriosis may also be irritable and feed less than usual.
Risks of listeriosis
Listeriosis is not usually serious for most people.
But some people have a higher risk of serious problems, including:
- anyone who is pregnant
- newborn babies
- people with a condition that weakens their immune system, such as cancer, diabetes, liver disease or kidney disease
- people having treatment that weakens their immune system, such as chemotherapy or steroid tablets
Older people are also at higher risk of getting seriously ill from listeriosis, and this risk increases with age.
If you get listeriosis while you're pregnant, there is a risk it could cause miscarriage or stillbirth.
In babies and people with a weakened immune system, listeriosis can sometimes lead to serious and life-threatening problems such as sepsis or meningitis.
Call 112 or go to A&E if you or your child:
- have a severe headache and stiff neck
- find it uncomfortable to look at bright lights
- have a fit (seizure)
- feel suddenly confused
- feel very sleepy or are difficult to wake
- have a rash that does not fade when a glass is rolled over it – the rash may be blotchy, like bruises or small red pinpricks
These could be symptoms of meningitis caused by listeriosis, which needs to be treated in hospital straight away.
Do not drive to A&E. Ask someone to drive you or call 112 and ask for an ambulance.
Bring any medicines you take with you.
Treatment for listeriosis
For most people, listeriosis is mild and gets better in a few days.
You can usually look after yourself at home by resting and drinking plenty of fluids.
If you're at a higher risk of getting seriously ill (for example, you're pregnant or have a weakened immune system), you may need antibiotics.
Find out how to treat diarrhoea and vomiting
How to avoid listeriosis
There are some simple things you can do to reduce your risk of getting listeriosis.
Do
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keep chilled, ready-to-eat foods cold – try to make sure your fridge is working properly and is set to 5C or below
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eat ready-to-eat foods within 4 hours of taking them out of the fridge
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eat, cook or freeze foods by their use-by date
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follow storage instructions on food labels and use opened food within 2 days (unless the packaging says otherwise)
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keep raw and ready-to-eat foods separate
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follow any cooking instructions on packaging, and cook or reheat (including frozen vegetables) until they're steaming hot right through
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wash your hands regularly with soap and water
Foods to avoid if you're at risk
If you're pregnant or have a weakened immune system, you should avoid eating ready-to-eat cold-smoked or cured fish products, such as smoked salmon or gravlax (unless cooked until steaming hot).
If you're pregnant, you should also avoid eating other foods that have the highest risk of causing listeriosis.
These include:
- some soft cheeses (including brie and camembert) – unless cooked until steaming hot
- all types of pâté – including vegetable pâté
- unpasteurised milk or dairy products
- any undercooked food
If you're pregnant, you should also avoid close contact with farm animals that are giving birth or have recently given birth.
Find out which foods to avoid during pregnancy
Consult with a doctor about Listeriosis
Discuss your symptoms and possible next steps with a doctor online.
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Discuss your symptoms and possible next steps for Listeriosis with a doctor online.
