Quantification of Fecal Calprotectin Concentration Difference Between Infants Aged Under 4 Months Old Suffering From Functional Gastrointestinal Disorders (FGID) and Infants Aged Under 4 Months Old Free From Disorders : a Transversal Case-control Monocentric Study

Quantification of Fecal Calprotectin Concentration Difference Between Infants Aged Under 4 Months Old Suffering From Functional Gastrointestinal Disorders (FGID) and Infants Aged Under 4 Months Old Free From Disorders : a Transversal Case-control Monocentric Study in Besançon

There is a high prevalence of FGID among infants : 30 % for regurgitations, 20 % for colitis , 15 % for functional constipation.This represents a frequent motive for pediatrics consultation : 23 to 28 % of medical consultations in this population are consequent to gastrointestinal symptoms among infants aged under 4 months old. This can lead to numerous inappropriate or unrecommended medication prescriptions.

Currently, fecal calprotectin threshold are only validated by science societies for children aged 5 years old and more. This study aims to quantify the difference of fecal calprotectin between a population of infants for whom no FGID has been finally detected, and a population of infants for whom FGID have been detected during the gastro-pediatrics consultation, , in order to later determine wether it is possible to validate a threshold in a population of infants aged under 4 months old.

Inclusion Criteria:

• Infants aged under 4 months old benefiting from a special gastro-pediatrics consultation
• FGID arm : infant with one or several FGID detected
• Free from FGID arm : infant without any FGID detected

Exclusion Criteria:

• Born before 37 week of amenorrhea.
• Neurologic failure, heart failure, respiratory failure, hepatic failure, pancreatic failure, renal failure, cancer or hematological malignancy.
• History of enteral feeding by tube (nasogastric, nasojejunal, gastrostomy, gastrostomy-jejunostomy, jejunostomy) or parenteral feeding.
• History of digestive tract surgery
• Suspicion of Immunoglobulin E-mediated Cow's Milk Protein Allergy (CMPA): anaphylactic-type reaction observed within a few minutes to 2 hours after ingestion of cow's milk protein, such as pruritus, erythema, angioedema, intense abdominal pain, projectile vomiting, acute diarrhea, bronchospasm, faintness, loss of consciousness, arterial hypotension or even anaphylactic shock.