Food poisoning symptoms & treatments – Illnesses & conditions

food can become contaminated at any stage during its output, march or cook .
For example, it can become contaminated by :

  • not cooking food thoroughly (particularly meat)
  • not correctly storing food that needs to be chilled at below 5C
  • keeping cooked food unrefrigerated for a long period
  • eating food that has been touched by someone who is ill or has been in contact with someone with diarrhoea and vomiting
  • cross-contamination (where harmful bacteria are spread between food, surfaces and equipment)

Cross-contamination can occur, for example, if you prepare naked wimp on a chopping board and do n’t wash the circuit board before preparing food that wo n’t be cooked ( such as salad ), as the harmful bacteria can be spread from the chopping board to the salad .
It can besides occur if bleak meat is stored above ready-to-eat meals and juices from the meat drip on to the food below.

See preventing food poisoning for data about reducing these risks

Types of infection

Food contamination is normally caused by bacteria, but it can besides sometimes be caused by viruses or parasites. Some of the main sources of contamination are described below .


In the UK, campylobacter bacteria are the most park lawsuit of food poisoning. The bacteria are normally found on raw or undercooked kernel ( peculiarly poultry ), unpasteurized milk and untreated body of water .
The brooding menstruation ( the meter between eating contaminated food and the begin of symptoms ) for food poisoning caused by campylobacter is normally between two and five days. The symptoms normally last less than a week .


salmonella bacteria are much found in crude or undercooked kernel, raw eggs, milk, and early dairy products .
The incubation menstruation is normally between 12 and 72 hours. The symptoms normally last around four to seven days .


Listeria bacteria may be found in a compass of chilled, “ ready-to-eat ” foods, including pre-packed sandwiches, cooked sliced meats and pâté, and soft cheeses ( such as Brie or Camembert ) .
All of these foods should be eaten by their “ use-by ” dates. This is particularly significant for pregnant women, because a listeria infection ( known as listeriosis ) in pregnancy can cause pregnancy and birth complications, and can result in spontaneous abortion .
The brooding period can vary well, from a few days to respective weeks. The symptoms will normally pass within three days .

Escherichia coli (E. coli)

Escherichia coli, much known as E. coli, are bacteria found in the digestive systems of many animals, including humans. Most strains are harmless but some can cause serious illness.

Most cases of E. coli food poisoning occur after eating undercooked beef ( peculiarly mince, burgers and meatballs ) or drinking unpasteurized milk .
The incubation period for food poison caused by E. coli is typically one to eight days. The symptoms normally last for a few days or weeks .


shigella bacteria can contaminate any food that has been washed in pollute water system .
Symptoms typically develop within seven days of eating contaminated food and final for up to a week .
An infection caused by Shigella bacteria is known as bacillar dysentery or shigellosis. See the topic on dysentery for more information about it .


The virus that most normally causes diarrhea and vomit is the norovirus. It ‘s easily spread from person to person, through contaminated food or water system. Raw shellfish, particularly oysters, can besides be a reservoir of infection .
The incubation period typically lasts 24-48 hours and the symptoms normally pass in a couple of days .
In youthful children, the rotavirus is a common induce of infection from contaminated food. The symptoms normally develop within a week and pass in about five to seven days .


In the UK, food poisoning caused by parasites is rare. It ‘s a lot more common in the modernize world.

parasitic infections that can be spread in contaminated food admit :

  • giardiasis – an infection caused by a parasite called Giardia intestinalis
  • cryptosporidiosis – an infection caused by a parasite called Cryptosporidium
  • ameobiasis – a type of dysentery caused by a single-cell parasite (ameoba) called Entamoeba histolytica (this is very rare in the UK)

The symptoms of food poison caused by a leech normally develop within 10 days of eating contaminated food, although sometimes it may be weeks before you feel ailing .
If left untreated, the symptoms can last a long time – sometimes several weeks or even a few months .

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Category : Health

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