Infectious gastroenteritis (acute) (pediatrics) Quiz: Ace Your Exams
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A 5-year-old boy is brought to the emergency department with a 12-hour history of sudden-onset vomiting, abdominal cramps, and watery diarrhea. A parent reports that symptoms began shortly after a birthday party where the child ate potato salad and cream-filled pastries. Temperature is 37.0 C (98.6 F), blood pressure is 115/70 mm Hg, heart rate is 90 beats per minute, respiratory rate is 16 breaths per minute, and oxygen saturation is 98% on room air. On examination, the child appears fatigued with tacky mucous membranes and capillary refill of < 2 seconds. Laboratory results are shown below. Which of the following is the best next step in management?
| Laboratory Value | Result | Reference Range |
| White blood cell (WBC) count | 8,500/µL | 5,100-13,400/µL |
| Hemoglobin | 13.2 g/dL | 11.5-13.5 g/dL |
| Platelet count | 290,000/µL | 150,000-450,000/µL |
| Sodium | 138 mEq/L | 138-145 mEq/L |
| Potassium | 4.1 mEq/L | 4.1-5.8 mEq/L |
| Blood urea nitrogen (BUN) | 12 mg/dL | 5-17 mg/dL |
| Fecal lactoferrin | Negative | Negative |
| Stool microscopy | Gram-positive cocci in clusters | Negative for pathogens |
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