E. coli stands for Escherichia coli, which is a type of bacteria. It is commonly found in the gut of humans and warm-blooded animals. Most types of E. coli are harmless and even help keep your intestines healthy. However, some strains of E. coli can cause illness, such as severe stomach pain, bloody diarrhea, and kidney failure. E. coli can be transmitted through contaminated food, water, or contact with infected animals or people. It is important to practice good hygiene, such as washing hands thoroughly and cooking food properly, to prevent E. coli infection.