Food poisoning is one of many causes of gastritis, which is an infection in the lining of the stomach. It's difficult to diagnose food poisoning based solely on symptoms because most cases of gastritis have similar symptoms. For example, viral gastroenteritis, or the stomach flu, can have the same symptoms as food poisoning. Your doctor can evaluate your condition and provide you with a clinical diagnosis.
Food Poisoning
Food poisoning causes infection in the lining of the stomach because of ingesting harmful substances through contaminated food or drinking contaminated beverages. The most common bacteria that cause food poisoning are E. coli and Staphylococcus. Food poisoning that causes gastritis can be the result of ingesting parasites, toxins, viruses or bacteria. Most cases of food poisoning are the result of poor food handling and preparation. Do not consume foods that appear to be rotten or have a foul smell.
Symptoms
Most symptoms of gastritis from food poisoning will develop within two to four hours after ingesting the food or beverage, depending on the type of infectious organism. Possible symptoms may include a fever, chills, abdominal cramping, diarrhea, nausea, vomiting and bodily weakness. Food poisoning rarely causes long-term effects and is treated with diet and rest. People who are at an increased risk of complications include people with compromised immune systems, infants and the elderly.
Diet Modification
Change your diet when you have symptoms of gastritis from food poisoning. Remove all foods that could cause greater irritation in the intestines, such as spicy foods, fried foods and dairy products. Avoid eating foods that are high in fiber because fiber can cause diarrhea to worsen. Do not drink beverages that contain alcohol or caffeine and increase the amount of water, juices and sports beverages you drink on a daily basis. Eat foods that are bland and easy to digest, such as white rice, white bread and bananas. If you notice that your symptoms improve, add apples, carrots, potatoes, crackers, gelatin and vegetables back into your diet.
Dehydration Consideration
Dehydration is a common complication of gastritis from food poisoning. Vomiting and diarrhea deplete the body of its water content and can lead to dehydration. Dehydration, if left untreated, can lead to brain damage and even death. Call your doctor if you become lightheaded, dizzy, thirsty or flushed or if your lips become dry.


