Inflammation of the stomach and intestines (gastroenteritis), often causing diarrhea, vomiting, abdominal pain, and sometimes fever; can be caused by infection or food poisoning.
昨夜の外食が原因で胃腸炎になってしまった。
I got gastroenteritis from eating out last night.
胃腸炎のときは脱水を防ぐためにこまめに水分を補給してください。
When you have gastroenteritis, drink fluids frequently to prevent dehydration.
子どもが胃腸炎で学校を休んだ。
The child missed school because of gastroenteritis.