A mixture containing galactooligosaccharide, produced by the enzymic activity of Bifidobacterium bifidum, reduces Salmonella enterica serovar Typhimurium infection in mice

Searle, L. E. J., Best, A., Nunez, A., Salguero, F. J., Johnson, L., Weyer, U., Dugdale, A. H., Cooley, W. A., Carter, Ben Richard, Jones, G., Tzortzis, G., Woodward, M. J. and La Ragione, R. M. 2009. A mixture containing galactooligosaccharide, produced by the enzymic activity of Bifidobacterium bifidum, reduces Salmonella enterica serovar Typhimurium infection in mice. Journal of Medical Microbiology 58 (1) , pp. 37-48. 10.1099/jmm.0.004390-0

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Abstract

The prebiotic Bimuno® is a mixture containing galactooligosaccharide, produced by the galactosyltransferase activity of Bifidobacterium bifidum NCIMB 41171 in the presence of lactose. Previous studies have implicated prebiotics in reducing infections by enteric pathogens, thus it was hypothesized that Bimuno® may confer some protection in the murine host from Salmonella enterica serovar Typhimurium (S. Typhimurium) infection. In this study, infection caused by S. Typhimurium SL1344nalr in the presence or absence of Bimuno® was assessed using tissue culture assays, a murine ligated ileal gut loop model and a murine oral challenge model. In tissue culture adherence and invasion assays with HT-29-16E cells, the presence of ∼2 mM Bimuno® significantly reduced the invasion of S. Typhimurium SL1344nalr (P<0.0001). In the murine ligated ileal gut loops, the presence of Bimuno® prevented colonization and the associated pathology of S. Typhimurium. In the BALB/c mouse model, the oral delivery of Bimuno® prior to challenge with S. Typhimurium resulted in significant reductions in colonization in the five organs sampled, with highly significant reductions being observed in the spleen at 72 and 96 h post-challenge (P=0.0002, <0.0001, respectively). Collectively, the results indicate that Bimuno® significantly reduced the colonization and pathology associated with S. Typhimurium infection in a murine model system, possibly by reducing the invasion of the pathogen into host cells.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Medicine
Subjects:	R Medicine > R Medicine (General) R Medicine > RM Therapeutics. Pharmacology
Uncontrolled Keywords:	GOS; galactooligosaccharide HE; haematoxylin and eosin VLA; Veterinary Laboratories Agency
Publisher:	Society for General Microbiology
ISSN:	0022-2615
Last Modified:	10 Jun 2023 01:41
URI:	https://orca.cardiff.ac.uk/id/eprint/29184

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