Final answer:
Bilious emesis is a symptom characterized by 1) vomiting, specifically with the presence of bile, indicated by a green or yellowish color. This term is related to medical conditions of the digestive system such as acute gastroenteritis. Vomiting is the correct answer as the likely symptom after the first feeding when bilious emesis is present.
Step-by-step explanation:
The symptom of bilious emesis within hours after the first feeding is most accurately described as vomiting. Bilious emesis refers to vomiting with a green or yellowish color, which can be an indication of bile in the stomach. Vomiting in this context may occur in various medical conditions, including acute gastroenteritis, where it is commonly accompanied by symptoms like diarrhea, abdominal pain, and cramping, as observed during the hospital incident in western Florida.
Considering other gastrointestinal conditions, vomiting is a clear sign of distress in the digestive system and is often an acute response to an irritant or infection. This is supported by the reports which include symptoms such as nausea, vomiting, diarrhea, and fever. The vomiting described as bilious is specifically related to gastrointestinal issues, placing vomiting as the correct answer and the most likely symptom after the first feeding when bilious emesis is observed. So the answer is option 1.