A 40-year-old woman presents with abdominal pain, bloating,…

A 40-year-old woman presents with abdominal pain, bloating, and loose stools for six months. She reports no weight loss, fever, or blood in the stool. Physical exam and colonoscopy are normal. Which finding best distinguishes Irritable Bowel Syndrome (IBS) from Inflammatory Bowel Disease (IBD)? IBS has…

A 6-month-old boy presents with a history of low-grade fever…

A 6-month-old boy presents with a history of low-grade fever of 100F (37.7C) and nonbilious vomiting (6 episodes per day) for 2 days. This is followed by diarrhea (15 stools per day) 24 hours later. Stools are watery and do not contain blood or mucus. He is in daycare and has an unknown vaccine history. What is the most likely diagnosis