Tolerance development in food protein-induced allergic proctocolitis: Single centre experience

Area of Science:

• Pediatric Allergy
• Gastroenterology
• Immunology

Background:

• Food protein-induced allergic proctocolitis (FPIAP) is a common, benign condition causing distal colon inflammation in infants due to food proteins.
• Characterized by bloody stools in well-appearing infants, FPIAP typically emerges within the first month of life.

Purpose of the Study:

• To investigate the clinical characteristics of infants diagnosed with FPIAP.
• To determine the time course of tolerance development in FPIAP patients.
• To identify potential risk factors influencing the development of tolerance to food proteins.

Main Methods:

• A retrospective cross-sectional study analyzed data from 77 FPIAP patients.
• Data collected included clinical symptoms, identified allergens, diagnostic methods, and time to tolerance.
• Patient data was gathered from January 2010 to January 2015.

Main Results:

• Milk was the primary allergen in 78% of cases; milk and egg in 13%; egg alone in 5%.
• The mean age of symptom onset was 3.3 months, with a mean tolerance development time of 14.7 months.
• 40% of patients achieved tolerance before one year of age, while 32% developed tolerance between ages 1-3 years.

Conclusions:

• Earlier symptom onset and breastfeeding are associated with quicker tolerance development in FPIAP.
• While most FPIAP cases resolve within the first year, some infants may experience prolonged symptoms.