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Relation between probiotic properties of isolates isolated from breast milk and infants’ stools

Relation between probiotic properties of isolates isolated from breast milk and infants’ stools PurposeBreast milk has been hypothesized to be a source of bacteria for the infant gut. This paper aims to search for probiotic bacteria among 415 isolates belonging to the Enterococcus, Lactobacillus, Streptococcus and Bifidobacterium genera recovered from breast milk of 50 lactating mothers and their respective infant stools, and then, determine whether their levels in stools vary with different modalities of breast feeding.Design/methodology/approachTo prove that the isolates were probable probiotics, subtractive screening was done using three major selection criteria, namely, resistance to low pH, tolerance against bile salts and testing for their antimicrobial activity.FindingsThe three criteria were fulfilled by 31.7 and 31 per cent of the isolates recovered from mothers’ breast milk and infants’ stool specimens, respectively. The majority of probiotic strains, isolated from milk and infants’ stools were phenotypically identical, suggesting breast milk as their probable source. Moreover, there was a positive correlation between exclusive breast milk feeding and the number of probiotics in the infants’ stools.Originality/valueViable bacteria could be retrieved from breast milk of healthy women, not suffering from mastitis, by using different types of media and different cultivation conditions. Up to five different species belonging to the same genus could be isolated in the same specimen of whether milk or stools. Breast milk could be a source of probiotic bacteria for intestinal microflora of infants, which help improvement of infants’ gut and growth. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nutrition & Food Science Emerald Publishing

Relation between probiotic properties of isolates isolated from breast milk and infants’ stools

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References (28)

Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0034-6659
DOI
10.1108/NFS-10-2014-0091
Publisher site
See Article on Publisher Site

Abstract

PurposeBreast milk has been hypothesized to be a source of bacteria for the infant gut. This paper aims to search for probiotic bacteria among 415 isolates belonging to the Enterococcus, Lactobacillus, Streptococcus and Bifidobacterium genera recovered from breast milk of 50 lactating mothers and their respective infant stools, and then, determine whether their levels in stools vary with different modalities of breast feeding.Design/methodology/approachTo prove that the isolates were probable probiotics, subtractive screening was done using three major selection criteria, namely, resistance to low pH, tolerance against bile salts and testing for their antimicrobial activity.FindingsThe three criteria were fulfilled by 31.7 and 31 per cent of the isolates recovered from mothers’ breast milk and infants’ stool specimens, respectively. The majority of probiotic strains, isolated from milk and infants’ stools were phenotypically identical, suggesting breast milk as their probable source. Moreover, there was a positive correlation between exclusive breast milk feeding and the number of probiotics in the infants’ stools.Originality/valueViable bacteria could be retrieved from breast milk of healthy women, not suffering from mastitis, by using different types of media and different cultivation conditions. Up to five different species belonging to the same genus could be isolated in the same specimen of whether milk or stools. Breast milk could be a source of probiotic bacteria for intestinal microflora of infants, which help improvement of infants’ gut and growth.

Journal

Nutrition & Food Science – Emerald Publishing

Published: May 9, 2016

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