Food Poisoning (cont.)
Benjamin Wedro, MD, FACEP, FAAEM
Dr. Ben Wedro practices emergency medicine at Gundersen Clinic, a regional trauma center in La Crosse, Wisconsin. His background includes undergraduate and medical studies at the University of Alberta, a Family Practice internship at Queen's University in Kingston, Ontario and residency training in Emergency Medicine at the University of Oklahoma Health Sciences Center.
Charles Patrick Davis, MD, PhD
Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.
In this Article
- Food poisoning facts
- What is food poisoning?
- What are the signs and symptoms of food poisoning?
- Are food poisoning and stomach flu the same thing?
- How long does food poisoning last?
- What are the types of food poisoning?
- What are the causes of food poisoning?
- Short incubation of less than 16 to 24 hours
- Intermediate incubation from about 1 to 3 days
- Long incubation of 3 to 5 days
- Very long incubation of up to a month
- When should the doctor be called for food poisoning?
- How is food poisoning diagnosed?
- What is the treatment for food poisoning?
- Are there any home remedies for food poisoning?
- How can food poisoning be prevented?
- What are the complications of food poisoning?
- What is the prognosis for someone with food poisoning?
- Food Poisoning Dangers Slideshow
- Food Frauds Slideshow
- Take the Summer Food Safety Quiz
- Summer Food Safety FAQs
- Find a local Doctor in your town
Long incubation of 3 to 5 days
- Hemorrhagic E. coli (mainly E. coli 0157:H7) can cause inflammation of the colon leading to bloody stools. In some children, about a week after infection, it can progress to hemolytic uremic syndrome (HUS). Elderly individuals may contract thrombotic thrombocytopenic purpura (TTP). Toxins from the bacteria enter the blood stream and hemolyze or destroy red blood cells. In addition, the toxins cause kidney failure and uremia, where waste products build up in the body.
- Yersinia enterocolitica may cause inflammation of lymph nodes in the lining of the abdomen and may mimic appendicitis.
Very long incubation of up to a month
- Giardiasis may occur after drinking water from lakes or rivers that have been contaminated by beavers, muskrats, or sheep that have been grazing. It also can be passed from person to person, for example in day care settings.
- Amoebiasis is encountered in contaminated drinking water, usually in tropical or semitropical climates and can be passed person to person.
- Trichinosis is due to an infection from eating undercooked pork or wild game such as bear meat. Aside from fever and gastrointestinal complaints, symptoms include muscle pain, facial swelling, and bleeding around the eyes and under the fingernails.
- Cysticercosis is often seen in developing countries where water is contaminated with pork tapeworms and the person swallows the ova form the tapeworm. The infection can invade the brain (neurocysticercosis) causing seizures.
- Cyclospora is a one celled parasite that infects the small intestine causing explosive, watery bowel movements. The infection is acquired from contaminated food or water and does not usually spread from person to person. Symptoms may also include headache, body aches, and malaise and can mimic a viral type infection. Without antibiotic treatment, Cyclospora infection will gradually resolve over the course of many weeks, but may come and go (relapse) over that time period.
- Listeriosis usually occurs after foods contaminated with Listeria bacteria are ingested. These include unpasteurized, raw milk, soft cheeses, and processed meats and poultry. Vegetables and fruits may also become infected with Listeria. The bacteria may lay dormant in or on the surface of the food products for weeks.
- Brucellosis occurs by ingesting raw or unpasteurized milk and cheese, especially goat's milk contaminated with Brucella spp
- Hepatitis A is spread by poor food handling, and not due to blood exposure such as in hepatitis B and C.
- Toxoplasmosis is usually transmitted to humans from cat feces containing Toxoplasma parasites; most infections are asymptomatic, but people who have diminished immune systems can develop systemic disease symptoms.
- Bovine Spongiform encephalopathy (mad cow disease) is acquired by eating foods containing prions (transmissible agents that induce abnormal folding of brain protein) contaminating brain or spinal cord from infected cows.
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