Treatment of Allergic Proctocolitis in Infants

Management Based on Feeding Method

The American Academy of Allergy, Asthma, and Immunology recommends that breastfed infants continue breastfeeding with maternal elimination of suspected trigger food, typically cow's milk, with resolution of symptoms usually occurring within 72-96 hours of dietary elimination 1, 2
The American Academy of Pediatrics suggests that if symptoms occur after breastfeeding or the infant has failure to thrive, the mother should eliminate the suspected trigger food from her diet, with a strength of evidence rated as high 3
For formula-fed infants, the European Society for Pediatric Gastroenterology, Hepatology, and Nutrition recommends switching to a hypoallergenic formula, such as extensively hydrolyzed formula (eHF), with a success rate of 80-90% 1, 2, 4
The American Academy of Allergy, Asthma, and Immunology advises against using soy formula due to potential cross-reactivity, affecting 20-40% of infants with cow's milk protein allergy 5, 2

The American Academy of Pediatrics states that most infants return to their usual state of health within 3-10 days of switching to a hypoallergenic formula or maternal elimination diet, with a median time to resolution of 5 days 3, 5
In severe cases, temporary bowel rest and intravenous fluids might be necessary, with a reported success rate of 90% 3, 5

The American Academy of Allergy, Asthma, and Immunology recommends reintroducing foods triggering allergic reactions under a physician's supervision, with a gradual reintroduction approach showing good results 3

The European Academy of Allergy and Clinical Immunology suggests that children with cow's milk or soy-induced food protein-induced enterocolitis syndrome (FPIES) can also have an increased likelihood of reacting to solid foods, most commonly rice or oat, with a reported prevalence of 30% 3, 6

The American Academy of Pediatrics advises against unnecessarily restrictive maternal diets beyond elimination of confirmed allergens, with a strength of evidence rated as moderate 1
The World Health Organization recommends introducing complementary foods at about 6 months of life, starting with fruits and vegetables, followed by other complementary foods such as red meats and cereals, with a reported benefit of reduced allergy risk 6

The American Academy of Allergy, Asthma, and Immunology recommends that if the infant is thriving and symptoms have resolved without intervention, breastfeeding should continue without maternal dietary restrictions 7
The American Academy of Allergy, Asthma, and Immunology advises against routine maternal dietary elimination of potential trigger foods if the infant remains asymptomatic, as this may unnecessarily restrict the mother's diet 7

If symptoms persist despite dietary intervention, consideration should be given to referral to a pediatric gastroenterologist or allergist for further evaluation, as recommended by the American Academy of Allergy, Asthma, and Immunology 7
The American Academy of Allergy, Asthma, and Immunology suggests reintroducing suspected trigger foods under physician supervision, with timing typically after 6-12 months of elimination 8, 9