Effect of various milk feeds on numbers ofEscherichia coliandBifidobacteriumin the stools of new-born infants

Abstract

SUMMARYEscherichia coliwas found in a similar proportion of stool specimens from infants who were breast-fed and from others fed on three different artificial-milk preparations. WhenE. coliwas present its mean colony count in the stools of breast-fed infants was within the range of the mean counts for infants receiving the artificial-milk feeds.There was no consistent relation between high counts of bifidobacteria (Lacto-bacillus bifidus) and low counts ofE. coli.This suggests that measures aimed at implanting or stimulating the growth of bifidobacteria in the large intestine of artificially fed infants may not greatly influence theE. colipopulation therein.The results are discussed in relation to the protection of artificially fed infants fromE. colienteritis.