ORIGINAL PAPER
Influence of the probiotic bacterial strain, Bacillus
cereus var. toyoi, on the development of selected
microbial groups adhering to intestinal mucosal
tissues of piglets
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Institute of Animal Nutrition, Free University of Berlin,
Brüemmerstrasse 34, 14195 Berlin, Germany
Publication date: 2000-05-08
J. Anim. Feed Sci. 2000;9(2):347-362
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ABSTRACT
The influence of the probiotic bacterial strain, Bacillus cereus var. toyoi, on the development of
total anaerobic growth, enterobacteria, lactic acid bacteria, and Enterococcus spp. associated with
intestinal mucosal tissues of piglets before and shortly after weaning was evaluated. Bacterial growth
capacities were determined in microtiter plates by incubating mucosal tissue extracts in selective
liquid media for enterobacteria, lactic acid bacteria (LAB), Enterococcus spp. or total anaerobic
growth.
Growth of mucosa-associated enterobacteria was reduced (P<0.05) in samples from the trial
group before weaning. Furthermore, growth was similar in all samples, while growth of enterobacteria from the control group increased the closer the samples were taken from the large intestine. Total
anaerobic bacteria showed similar development as enterobacteria. Decreased growth was recorded in
samples from the small intestine of piglets from the control group at the time of weaning at 28 d of
age. Growth of Enterococcus spp. and LAB decreased from d 13 of age and displayed a sharp increase after weaning, independent of probiotic supplementation.
It is concluded that B. cereus var. toyoi depressed growth of enterobacteria in the intestinal tract.
There are strong indications that the early uptake of already modified microbial populations from
faeces of the sow aids in the establishment of similar microbial populations in the piglet.
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