Infectious gastroenteritis (subacute) (pediatrics) Quiz: Ace Your Exams

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A 4-year-old boy is brought to the emergency department for evaluation of a 2-week history of diarrhea. The diarrhea is watery, occasionally mixed with blood, and associated with abdominal cramping and fever. He has also been fatigued, and his appetite has decreased. A 10-day course of amoxicillin was completed for otitis media 3 weeks ago. The child is not currently enrolled in daycare. No recent travel is reported. The child is otherwise healthy and does not take any medications daily. Temperature is 38.5°C (101.3°F), heart rate is 140/min, respiratory rate is 28/min, and blood pressure is 82/46 mm Hg. The child appears lethargic but is arousable to verbal stimuli. Mucous membranes appear dry, and capillary refill is 4 seconds. Abdominal exam reveals diffuse tenderness without guarding or rebound. Which of the following is the best next step in management? 

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