Short and Long Term Effect of Early Infant Feeding and Nutritional Status on the Children's Health

Throughout the human lifetime, the intestinal microbiota performs vital functions, such as barrier function, metabolic reactions, trophic effects, and maturation of the host's innate and adaptive immune responses. Therefore, the human health depends on the gut health. It is reported that the human gut microbiota of a healthy adult is highly resilient and very stable over time. And before it reaches maturity, the microbiota must develop itself from birth and establish its mutually beneficial cohabitation with the host. However, the early developments of the microbiota in infants are influenced by many factors, such as prenatal parameters, the influence of the mother and her microbiota, and therapies occurring around the time of birth.

Human milk is the sole source of nutrition for infants during the first weeks to months after birth, and has evolved to provide nutrition and immunological protection in the extra-uterine environment into which the infant is born. But when breastfeeding is not possible, human newborns may circumstantially be fed with infant formulas. The difference of feeding mode has been demonstrated to have a strong influence on early gut colonization particularly on the probiotic bacteria. Studies show that breastfed infants have higher counts of Bifidobacteria and Lactobacillus and lower counts of Bacteroides, Clostridium, coccoides group, Staphylococcus, and Enterobacteriaceae as compared with formula-fed infants.