04/04/2022
FPIES can be hard to diagnose. Blood allergy tests can help reveal IgE-mediated food allergies, but FPIES is a non-IgE-mediated disorder. So far, there is no valid laboratory or skin test for FPIES. Furthermore, FPIES reactions are often mistaken for something else, like a stomach bug. The lag time between feeding and the onset of symptoms can cloud connection between cause and effect. Often, FPIES is only suspected after multiple allergic...