Infectious gastroenteritis is an inflammation of the stomach and intestines caused by infectious agents such as viruses, bacteria, or parasites. Common symptoms include diarrhea, vomiting, abdominal pain, and fever. It can spread through contaminated food, water, or close contact with infected individuals. Prevention includes practicing good hygiene, such as washing hands frequently and ensuring food is cooked properly. Most cases resolve on their own, but severe dehydration may require medical attention. Staying hydrated is crucial, especially for vulnerable populations like children and the elderly.