>>>but it has also grown enterobacteriaceae, which I was concerned about.<<<

Melissa,

A good article is at this link:
http://www.bact.wisc.edu/Bact303/Bact303normalflora

Here's an excerpt about the bacteria colonizing the intestinal tract of a
breastfed baby:

"At birth the entire intestinal tract is sterile, but bacteria enter with
the first feed. The initial colonizing bacteria vary with the food source of
the infant. In breast-fed infants bifidobacteria account for more than 90%
of the total intestinal bacteria. Enterobacteriaceae and enterococci are
regularly present, but in low proportions, while bacteroides, staphylococci,
lactobacilli and clostridia are practically absent. In bottle-fed infants,
bifidobacteria are not predominant. When breast-fed infants are switched to
a diet of cow's milk or solid food, bifidobacteria are progressively joined
by enterics, bacteroides, enterococci lactobacilli and clostridia.
Apparently, human milk contains a growth factor that enriches for growth of
bifidobacteria, and these bacteria play an important role in preventing
colonization of the infant intestinal tract by non indigenous or pathogenic
species."

Pat W

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