Leonor, 72 years old patient is being treated with antibiotics for her UTI. After three days of taking them, she developed diarrhoea with blood stains. What is the most possible reason for this?

  • Antibiotics causes chronic inflammation of the intestine

  • An anaphylactic reaction

  • Antibiotic alters her GI flora which made Clostridium-difficile to multiply

  • she is not taking the antibiotics with food