Compositions for use in the prevention or treatment of necrotizing enterocolitis in infants or young children born by C-section

1. A method for treating necrotizing enterocolitis and/or decreasing incidence of necrotizing enterocolitis in an infant or young child born by C-section, the method comprising administering to the infant or young child born by C-section a composition comprising a mixture of human milk oligosaccharides, the mixture comprising 2′-fucosyllactose (2FL) that is 60 to 70 wt. % of the mixture, an N-acetylated oligosaccharide that is 20 to 30 wt. % of the mixture, and 6′ sialyllactose (6SL) that is 10 to 20 wt. % of the mixture, the N-acetylated oligosaccharide comprising lacto-N-tetraose (LNT) and lacto-N-neotetraose (LNnT) in a ratio LNT:LNnT between 2:1 and 1:1.

2. The method according to claim 1 wherein the infant or young child is a preterm infant born by C-section, and the composition is administered to the preterm infant born by C-section during the first week after birth of the infant.

3. The method according to claim 1 , wherein the mixture further comprises a precursor of human milk oligosaccharide selected from the group consisting of sialic acid, fucose and combinations thereof.

4. The method according to claim 1 wherein the composition is administered in an amount that provides a daily dose of 0.1 to 3 g of the N-acetylated oligosaccharide.

5. The method according to claim 1 wherein the composition is administered in an amount that provides a daily dose of 0.1 to 2 g of the 6 ′ sialyllactose (6SL).

6. The method according to claim 1 wherein the composition is administered in an amount that provides a daily dose of 0.1 to 4 g of the 2′-fucosyllactose (2FL).

7. The method according to claim 1 , wherein the mixture further comprises 3′ sialyllactose (3-SL).

8. The method according to claim 1 , wherein the mixture further comprises a fucosylated oligosaccharide selected from the group consisting of 3-fucosyllactose (3-FL), difucosyllactose, lacto-N-fucopentaose I, lacto-N-fucopentaose II, lacto-N-fucopentaose III, lacto-N-fucopentaose V, lacto-N-difucohexaose I, lacto-N-fucohexaose, fucosyllacto-N-hexaose, fucosyllacto-N-neohexaose, difucosyllacto-N-hexaose I, difuco-lacto-N-neohexaose, difucosyllacto-N-neohexaose I, difucosyllacto-N-neohexaose II, fucosyl-para-Lacto-N-hexaose, tri-fuco-para-Lacto-N-hexaose I and combinations thereof.

9. The method according to claim 1 wherein the mixture further comprises sialic acid.

10. The method according to claim 1 , wherein the composition comprises at least one probiotic in an amount of from 10 3 to 10 12 cfu/g of the composition (dry weight).

11. The method according to claim 1 , wherein the composition is selected from the group consisting of a nutritional composition, a preparation and a food product.

12. The method according to claim 1 , wherein the composition is selected from the group consisting of an infant formula, a starter infant formula, a follow-on infant formula, a baby food, an infant cereal composition, a growing-up milk, a fortifier and a supplement.

13. The method according to claim 1 , wherein the composition is administered to the infant or young child before and/or during the weaning period.

14. The method according to claim 1 , wherein the infant or young child is a preterm infant born by C-section.

15. The method according to claim 1 , wherein the N-acetylated oligosaccharide comprises lacto-N-tetraose (LNT) and lacto-N-neotetraose (LNnT) in a ratio LNT:LNnT between 2:1.2 and 2:1.6.

16. The method according to claim 1 , wherein the N-acetylated oligosaccharide comprises lacto-N-tetraose (LNT) and lacto-N-neotetraose (LNnT) in a ratio LNT:LNnT of 1.3:1.