Probiotic intervention in neonates--will permanent colonization ensue?

The presence of Lactobacillus rhamnosus GG at 6 and 12 months in the feces of 128 infants receiving the strain or placebo for 6 months after birth was monitored. No permanent establishment of the strain was found, but transient colonization was observed at 6 months of age. The presence of the strain at the end of the administration period was correlated with a reduced prevalence of atopic eczema later in life.