Infantile Vomiting Is Not Always What You Think: The Importance of a Broad Differential Diagnosis.

Characterized by its green or yellowish color, bilious vomiting in an infant is often an indicator of an anatomic abnormality such as intestinal malrotation with volvulus, duodenal atresia/stenosis, or obstruction. Some infectious causes include acute gastroenteritis, norovirus, parasitic infections, and necrotizing enterocolitis (NEC). Here, we present an unusual case of an infant with bilious vomiting due to methicillin-resistant Staphylococcus aureus (MRSA) bacteremia with hepatic abscess. While rare, this case highlights the importance of adding this diagnosis to the differential as MRSA continues to be problematic in both the community and hospital.