Establishment and development of lactic acid bacteria and bifidobacteria microbiota in breast-milk and the infant gut.
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.
Solís
G
G
Servicio de Pediatria, Hospital de Cabueñes, SESPA, Gijón, Asturias, Spain.
de Los Reyes-Gavilan
C G
CG
Fernández
N
N
Margolles
A
A
Gueimonde
M
M
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