after consumption of a whey drink containing Lactobacillus GG
was studied.
A less adhesive lot of Lactobacillus GG was found in Boston
in the course of clinical studies (B Goldin, unpublished
observations, 1996). This isolate was also found to colonize
human subjects less frequently than the original culture when
assessed according to fecal counts. Later, the adhesion properties
of 3 different production lots of Lactobacillus GG were studied in
humans by observing the persistence of the strain in fecal samples
(16). It was observed that at an intake of 1 1010 colonyforming
units/d, differences between production lots were
reported, some of which could be related back to the adhesion
study with the Caco-2 cell line. At higher intakes the colonizing
properties of different production lots were similar (17).
Some production lots were tested for their ability to adhere to
human ileal cells (B Goldin, unpublished observations, 1990).
When compared with the original Lactobacillus GG isolate