WebMD Answers
Since most food poisoning is mild and passes in a few days, most people do not go to a health professional for a diagnosis. You can often diagnose food poisoning yourself if others who ate the same food as you also become ill.
If you do go to your health professional, he or she will make the diagnosis based on your symptoms, a physical exam, and your medical history. Your health professional will ask where you have been eating and whether anyone who ate the same food has the same symptoms.
Occasionally the following tests are done.
Your health professional may need to report your condition to the health department; this is done to help the government track the condition and identify possible outbreaks.
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