Open AccessExpression of type 1 fimbriae (SEF 21) of Salmonella enterica serotype Enteritidis in the early colonisation of the rat intestine
Author(s) -
Patrick Naughton,
George Grant,
Susan Bardócz,
Emma AllenVercoe,
Martin J. Woodward,
Á. Pusztai
Publication year - 2001
Publication title -
journal of medical microbiology/journal of medical microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 117
eISSN - 1473-5644
pISSN - 0022-2615
DOI - 10.1099/0022-1317-50-2-191
Subject(s) - salmonella enteritidis , fimbria , colonisation , microbiology and biotechnology , serotype , salmonella enterica , biology , salmonella , escherichia coli , virology , bacteria , colonization , gene , genetics
The involvement of type 1 fimbriae in colonisation of the rat gastrointestinal tract in vivo was investigated with Salmonella enterica serotype Enteritidis LA5 and a mutant of LA5 denoted EAV3 unable to elaborate type 1 fimbriae (SEF 21). Rats were given a single dose of LA5 or EAV3 or a 1:1 mixture of both. LA5 was found in higher numbers in the stomach and small intestine than EAV3 at 6 h after infection with a single strain, but not after 6 days. LA5 did not out-compete EAV3 when the strains were administered together. Indeed, after 6 and 21 days, EAV3 was found in the distal small intestine and large intestine in far higher numbers than LA5. These findings suggest that SEF 21 have an important role(s) in the early stages of infection in vivo. However, SEF 21 expression may disadvantage the pathogen in the longer term as indicated by EAV3 out-competing LA5 in the gut at 21 days.