The objectives of this study were to determine whether or not the prob
iotic Lactobacillus GG can colonise the immature bowel of premature in
fants and if so, does colonisation result in a reduction of the size o
f the bowel reservoir of nosocomial pathogens such as enterobacteriace
ae, enterococci, yeasts or staphylococci, and does colonisation with L
actobacillus GG have any effect on the clinical progress and outcome.
Twenty preterm infants with a gestational age of 33 weeks or less who
were resident on a neonatal unit were studied from the initiation of m
ilk feeds until discharge. The infants were randomised to receive eith
er milk feeds or milk feeds supplemented with Lactobacillus GG 10(8) c
olony forming units twice a day for two weeks. The clinical features o
f the two groups of infants were similar. Orally administered Lactobac
illus GG was well tolerated and did colonise the bowel of premature in
fants. However, colonisation with Lactobacillus GG did not reduce the
faecal reservoir of potential pathogens and there was no evidence that
colonisation had any positive clinical benefit for this particular gr
oup of infants.