Jul 1, 1984

Peyer's patch lymphoid follicle epithelial adherence of a rabbit enteropathogenic Escherichia coli (strain RDEC-1). Role of plasmid-mediated pili in initial adherence

The Journal of Clinical Investigation
L R Inman, J R Cantey


Escherichia coli (strain RDEC-1) adheres to M cells of rabbit Peyer's patch lymphoid follicle epithelium. The RDEC-1 strain contains an 85 X 10(6) D plasmid that codes for pili, which, when purified, adhere to gut absorptive epithelium. This study compared the in vivo lymphoid follicle adherence of the RDEC-1 strain with that of a Shigella flexneri (ShD15) that contained the 85 X 10(6) D plasmid and expressed the RDEC-1 pili, a control E. coli, and a control S. flexneri (ShD12). The bacteria were given in a dose of 10(10) to 0.7-1.1 kg rabbits. The rabbits were sacrificed at 2, 4, 6, and 12 h postinoculation. Peyer's patch tissue was examined by electronmicroscopy and direct fluorescence microscopy. The piliated ShD15 and RDEC-1 bacteria adhered in large numbers at 2 and 4 h postinoculation, but only the RDEC-1 strain persisted and increased in numbers past that time. Control strains did not adhere. The ShD15 strain adhered to and was rapidly taken into M cells, precipitating an acute inflammatory reaction within the follicle and adjacent lumen. Initial lymphoid follicle M cell adherence of the ShD15 strain was associated with the possession of the adherence pilus plasmid. The failure of the ShD15 strain to survive and colonize...Continue Reading

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Mentioned in this Paper

Immunofluorescence Assay
Structure of Aggregated Lymphoid Follicle of Small Intestine
Alkalescens-Dispar Group
Entire Lumen of Body System
Microfold Cell
Escherichia Coli Infections
Peyer Patch Lymphoid Follicle