How do you get infected with food
poisoning?
You can become infected through eating
contaminated food. Food can become
contaminated at any stage during its production,
processing or cooking.
For example, you can get food poisoning by:
• not cooking food thoroughly (particularly
poultry, pork, burgers, sausages and kebabs);
• not correctly storing food that needs to be
chilled at below 5°C;
• eating food that has been touched by
someone who is ill with diarrhoea and
vomiting;
• cross-contamination (the spread of bacteria,
such as E. coli, from contaminated foods).
How can you avoid getting infected
with food poisoning?
Wash your hands thoroughly with soap and warm
water:
• before preparing and eating food;
• after handling raw food;
• after going to the toilet or changing a baby’s
nappy;
• after contact with pets and other animals
especially during farm visits;
• after working in the garden.
Always wash raw fruit and vegetables before
eating.
You should never handle food if:
• you are ill with stomach problems, such as
diarrhoea or vomiting;
• you have damaged skin or sores caused by
injury or disease (eg boils and septic cuts)
unless the infected area is completely covered
(eg by a waterproof dressing).
The best way to avoid getting food poisoning is
to ensure you maintain high standards of food
hygiene when storing, handling and preparing
food.
How can you maintain high standards
of hygiene when storing, handling or
preparing food?
Take chilled and frozen foods home quickly – then
put into the refrigerator or freezer at once.
Keep cooked food away from raw food. Store raw
foods below cooked or ready-to-eat foods in the
fridge to prevent contamination.
Food poisoning
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What is food poisoning?
Food poisoning is an illness caused by eating
contaminated food.
In most cases, the food is contaminated by
bacteria, such as Salmonella or Escherichia coli
(E. coli), or a virus, such as norovirus.
The symptoms usually begin 1–3 days after
eating food and can include feeling sick,
vomiting, diarrhoea, fever and stomach cramps.
Sometimes food poisoning can be caused
by a toxin in the food. In these cases, the
predominant symptom is vomiting.
Cook food thoroughly, especially meat, so that it
is piping hot. Follow cooking instructions on the
pack.
If you reheat food, make sure it is piping hot all the
way through. Only reheat food once.
Keep hot foods hot and cold foods cold. Don’t
just leave these foods sitting at room temperature.
Keep your refrigerator at 0–5°Centigrade. Get
a thermometer to check temperatures inside the
refrigerator.
Check ‘use by’ dates on food, and use foods
within the recommended date on the pack.
Keep pets away from food, dishes and worktops.
Wash hands thoroughly before preparing and
eating food and after handling raw food.
Keep all kitchen surfaces and equipment,
including knives, chopping boards and dish cloths
clean. Wash worktops and utensils between
handling raw and cooked foods.
How can you prevent others in your
household becoming infected?
Everyone in the house should wash their hands
thoroughly with soap and warm water after going
to the toilet and after handling soiled clothing or
bedding and before preparing/eating food.
Wash the infected person’s laundry separately
and on the hottest cycle of the washing machine
for that particular fabric.
Clean toilet seats, toilet bowls, flush handles,
taps and wash hand basins after use with
detergent and hot water, followed by a household
disinfectant.
Everyone in the house should have their own
towel and they should not use anyone else’s.
The infected person should not prepare or serve
food for others.
What are the symptoms of food
poisoning and how long do they last?
The most common symptoms are nausea,
vomiting and diarrhoea. Other symptoms can
include stomach pains and cramps, fever, loss of
appetite and muscle pain.
Symptoms usually develop 1–3 days after eating
contaminated food. However, depending on the
type of food poisoning, symptoms can develop
between one hour and several weeks after
eating contaminated food. Most cases resolve
within12–48 hours.
How is food poisoning treated?
There is no specific treatment for food poisoning.
Most people make a full recovery without any
specific treatment.
During this time it is important to drink plenty
of fluids as diarrhoea or vomiting can lead to
dehydration and you can lose important sugars
and minerals from your body.
If you feel sick and have difficulty keeping fluids
down try taking small sips of fluid frequently. Avoid
tea, coffee, carbonated drinks or alcohol. Always
dilute sugary drinks even if you would not normally
dilute them.
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Do you need to see your GP?
If you need advice on the treatment of food
poisoning you should discuss this with your GP.
Always contact your GP if any of the following
apply:
your symptoms are severe or do not improve
after a few days;
you have a high temperature (fever) of 38°C
(100.4°F) or over;
you have symptoms of severe dehydration,
such as sunken eyes and passing small
quantities of dark, strong smelling urine;
you have a baby with symptoms;
you are pregnant.
Do you need to stay off work or
school?
Yes. While you are ill and have symptoms you
are infectious to other people. In most cases, you
can return to work or school once you have been
free from diarrhoea for 48 hours.
You should tell your employer you have had food
poisoning if you work with vulnerable groups
such as the elderly, the young, those in poor
health, or if you handle food.
Children should not attend school/childcare or
play with other children. In most cases, they can
return to school/childcare when they are fully
recovered and symptom free for 48 hours.
Certain types of food poisoning require specific
testing to be carried out before you can return
to work/school/childcare (eg a stool sample).
You will be told if this applies to you and the
arrangements for testing will be explained.
Public Health Agency, 12-22 Linenhall Street,
Belfast BT2 8BS. Tel: 0300 555 0114
www.publichealth.hscni.net
02/16
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