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Strains of Lactobacillus isolated from animals of several species were examined for their capacity to colonize the lumens and form layers on the keratinized nonsecreting epithelium in the stomachs of monoassociated ex-germfree mice. All strains tested could be cultured at comparable population levels from the stomachs of the mono-associated mice. With one exception, however, only strains previously isolated from rodents were able to form thick continuous layers on the gastric epithelial surface. The exception was a strain isolated from calf feces. This strain formed a layer on the epithelial surface, comparable to layers seen in animals associated with strains from rodents.
Lin et al. (Sat,) studied this question.