Concurrent findings show that several fecal biomarkers, namely myeloperoxidase (MPO; indicates intestinal inflammation), neopterin (NEO; indicates intestinal inflammation), and alpha-1 antitrypsin (AAT; indicates loss of enteric proteins and intestinal permeability), are associated with EED and thus have been proposed as noninvasive alternatives for the diagnosis of EED.11 Here, MPO is linked to gastroenteritis.