Jeremy Middleton, MD

The parents of a 7-month-old girl brought their daughter for immediate medical attention after she passed bright green-colored stool. For the past 24 hours, the child had mild fussiness and a low-grade fever (temperature, 38.1°C [100.6°F]); she also had vomiting and mild diarrhea, with yellow-colored stools. The mother was advised to begin small, frequent feedings of oral rehydration solution with gradual return to the baby's normal diet, as tolerated. Over the next 12 hours, the vomiting and fussiness decreased and the fever resolved, but the mild diarrhea persisted and stools turned bright green. The parents denied giving the child green-colored drinks or food.