by Brian Curl » Tue May 01, 2007 4:35 pm
Symptoms
The symptoms of food poisoning usually affect your stomach and intestines (gastrointestinal tract).
* The first symptom is usually diarrhea.
* Other symptoms include feeling sick to your stomach (nausea), vomiting, and abdominal cramps.
The time it takes for symptoms to appear, how severe the symptoms are, and how long the symptoms last depend on the infecting organism, your age, and your overall health.
The very young and the very old may be most affected by food poisoning. Their symptoms may last longer, and even the types of food poisoning that are typically mild can be life-threatening. This may also be true for pregnant women and people with impaired immune systems, such as those with long-lasting (chronic) illnesses.
Not all food poisoning results in diarrhea, nausea, vomiting, and abdominal cramps. Some types of food poisoning have different or more severe symptoms:
* Clostridium botulinum (botulism) produces toxins that paralyze the nerves and the muscles. Botulism symptoms usually begin 18 to 36 hours after eating contaminated foods and include weakness and double vision. Paralysis progresses from the head to the rest of the body.
* Toxoplasmosis often has no symptoms, or the symptoms are flu-like. You may have swollen lymph glands or muscle aches and pains that last for a few days to several weeks. Toxoplasmosis is dangerous to a pregnant woman and her fetus. For more information, see the topic Toxoplasmosis During Pregnancy.
* Listeriosis causes fever, muscle aches, and sometimes nausea or diarrhea. If the infection spreads to the brain and nervous system, then symptoms such as headache, stiff neck, confusion, loss of balance, or convulsions can occur. A pregnant woman may experience only a mild, flu-like illness. Infections during pregnancy can lead to premature delivery, serious infection of the newborn, or even stillbirth.
* E. coli O157:H7 infection can cause serious complications, such as severe blood and kidney problems, in children younger than 5 years and adults older than 65. For more information, see the topic E. coli Infection.
* Salmonellosis may last more than a week and require hospitalization.