title: Establishment and development of lactic acid bacteria and bifidobacteria microbiota in breast-milk and the infant gut.
abstract: The initial establishment of lactic acid bacteria (LAB) and bifidobacteria in the newborn and the role of breast-milk as a source of these microorganisms are not yet well understood. The establishment of these microorganisms during the first 3 months of life in 20 vaginally delivered breast-fed full-term infants, and the presence of viable Bifidobacterium in the corresponding breast-milk samples was evaluated. In 1 day-old newborns Enterococcus and Streptococcus were the microorganisms most frequently isolated, from 10 days of age until 3 months bifidobacteria become the predominant group. In breast-milk, Streptococcus was the genus most frequently isolated and Lactobacillus and Bifidobacterium were also obtained. Breast-milk contains viable lactobacilli and bifidobacteria that might contribute to the initial establishment of the microbiota in the newborn.
authors.affiliation: Servicio de Pediatria, Hospital de Cabueñes, SESPA, Gijón, Asturias, Spain.
authors.forename: G
authors.initials: G
authors.lastname: Solís
authors.forename: C G
authors.initials: CG
authors.lastname: de Los Reyes-Gavilan
authors.forename: N
authors.initials: N
authors.lastname: Fernández
authors.forename: A
authors.initials: A
authors.lastname: Margolles
authors.forename: M
authors.initials: M
authors.lastname: Gueimonde
mesh_terms: D001644:Bifidobacterium / Q000302:isolation & purification*; D001942:Breast Feeding; D015169:Colony Count, Microbial; D005260:Female; D041981:Gastrointestinal Tract / Q000382:microbiology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007778:Lactobacillus / Q000302:isolation & purification; D008895:Milk, Human / Q000382:microbiology*; D013291:Streptococcus / Q000302:isolation & purification