Food Protein-Induced Enterocolitis Syndrome Food Protein-Induced Enterocolitis Syndrome food protein-induced enterocolitis syndrome Food Protein-Induced Enterocolitis Syndrome (FPIES) American College of Allergy, Asthma & Immunology 60 to 90 percent cannot be diagnosed with skin prick tests Food Protein-Induced Enterocolitis Syndrome American College of Allergy, Asthma & Immunology