Final answer:
True, E. coli commonly causes diarrhea in humans and in calves due to infections from contaminated food or water. Several pathogenic strains of E. coli, including E. coli O157:H7, can cause gastrointestinal illnesses.
Step-by-step explanation:
True, E. coli commonly causes diarrhea in humans and in calves. There are several pathogenic strains of E. coli that can cause gastrointestinal infections, including E. coli O157:H7. In humans, infection from E. coli can result in abdominal cramps and diarrhea. The infection is usually acquired through contaminated food or water, especially raw vegetables and undercooked meat.