Food protein-induced enterocolitis syndrome (FPIES) is when food allergies affect the gastrointestinal tract of babies and young children. It is rare but may be more prevalent than doctors previously understood.
The main symptoms of food protein-induced enterocolitis syndrome, or FPIES, are recurring, severe diarrhea and vomiting. An infant may experience these symptoms from time to time, or they may be continuous and chronic. There are a few common trigger foods, but any food may be responsible.
Doctors sometimes find it challenging to diagnose FPIES because the symptoms do not show up immediately. The disorder may present differently in every child, and treatment usually involves eliminating food triggers from their diet.
FPIES can be difficult to diagnose, as symptoms can vary.
Severe diarrhea and vomiting are the most common symptoms of FPIES. Vomiting typically occurs about 2 to 3 hours after eating a trigger food and is then followed by diarrhea. Other symptoms may include: Lethargy, or feeling fatigued and weak, blue skin color, dehydration, high or low body temperature, low blood pressure, weight loss, poor growth, shock-like symptoms, such as fainting, shallow breathing, and fast pulse.
Infants who have FPIES may also show signs of failure to thrive, or FTT, which may result in delayed growth in many areas.
An infant may struggle to gain weight or even stay the same weight. They may also reach other growth milestones at a later age, and their physical, social, and mental skills may develop more slowly than other infants.
Causes and triggers
Technically, any food proteins might trigger FPIES symptoms. However, some triggers are more common than others.
According to the FPIES Foundation, cow’s milk and soy proteins found in infant formula are the biggest culprits in the first few months of an infant’s life. The proteins in breast milk may also cause a reaction, though this is rare.
Once infants begin to eat solid foods, then oats and rice are the most likely triggers, though some other foods that may trigger a reaction include: Barley, eggs, green beans, milk, peas, poultry such as chicken or turkey, soy, squash, sweet potatoes.
Most infants only react to one or two food proteins, but others respond to the proteins in a variety of foods. Also, a child who reacts to one particular grain may also develop an allergy to a different grain.
It is vital for all those caring for infants to remember that any food protein may be a potential trigger for FPIES.
Any child can develop FPIES, but some infants are at higher risk of developing FPIES than others.
According to the American College of Allergy, Asthma, and Immunology, 20 percent of children with FPIES have family members with food allergies, while 40 to 80 percent have family members with allergic diseases, such as hay fever, asthma, and eczema.
Treatment and coping with FPIES
After identifying a trigger food, eliminate it from the child’s diet.
Treatment usually involves eliminating all trigger foods from the diet. If treatment has successfully identified all trigger foods, then ensuring that a child never eats them may be all that is necessary.
Parents can give formula-fed babies with FPIES a hypoallergenic formula that is free from soy, dairy, grains, or other potential allergens.
In the rare case that a breastfed baby reacts to breast milk, it may mean that the trigger food is in the woman’s diet. There have also been rare reports of exclusively breastfed infants having symptoms of FPIES.
Switching to a formula temporarily while identifying which foods trigger the reaction and eliminating these from the diet may be necessary or a person may need to eliminate breast milk from the baby’s diet permanently.
It may also help to carry a letter that includes information about the child, their condition, and any foods that trigger a reaction. This is particularly helpful for trips to the emergency room in severe cases when the child has signs of shock or dehydration.
People must seek treatment immediately if a child with FPIES experiences chronic and severe symptoms. If the symptoms persist, they should take the infant directly to the emergency room.
At the hospital, doctors may administer a drip to keep a child hydrated and avoid potentially serious complications.
In some cases, doctors will give medications to stop the immune system reaction or to stabilize the child’s blood pressure. Treatment then involves strictly monitoring the child’s food intake and avoiding all trigger foods.
As FPIES is not a typical allergic reaction, it usually does not require the use of epinephrine or an Epi-pen.
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