Expression of type I pili is abolished in verotoxin-producing Escherichia coli O157

Verotoxin-producing Escherichia coli (VTEC) were examined for production of type I pili. None of 34 strains of VTEC serogroup O157 examined expressed any pili, whereas 26 strains of 27 VTEC serogroup O26 and seven strains of nine non-VTEC O157 produced type I pili. These VTEC strains were collected...

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Bibliographic Details
Published in:FEMS microbiology letters 1999-10, Vol.179 (2), p.467-472
Main Authors: Enami, M, Nakasone, N, Honma, Y, Kakinohana, S, Kudaka, J, Iwanaga, M
Format: Article
Language:English
Subjects:
Adhesins, Bacterial
Agglutination Tests
Animals
Bacteria
Bacterial Outer Membrane Proteins - biosynthesis
Bacterial Toxins - biosynthesis
Bacteriology
Biological and medical sciences
Blotting, Western
Carrier Proteins
Cattle
E coli
Escherichia coli
Escherichia coli - physiology
Escherichia coli Proteins
Fim gene
Fimbriae, Bacterial - physiology
Fundamental and applied biological sciences. Psychology
Humans
Microbiology
Pathogenicity, virulence, toxins, bacteriocins, pyrogens, host-bacteria relations, miscellaneous strains
Pili
Shiga Toxin 1
Strains (organisms)
Type I pilus
Verotoxin
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Summary:Verotoxin-producing Escherichia coli (VTEC) were examined for production of type I pili. None of 34 strains of VTEC serogroup O157 examined expressed any pili, whereas 26 strains of 27 VTEC serogroup O26 and seven strains of nine non-VTEC O157 produced type I pili. These VTEC strains were collected from sporadic human cases and cattle in Okinawa in 1997. The genes encoding the major structural component (FimA) and the adhesin (FimH) of type I pili were detected in all 70 strains examined. The inability to express type I pili could be a unique character of VTEC O157 and this trait could be a new candidate to identify the organisms.
ISSN:0378-1097
1574-6968
DOI:10.1111/j.1574-6968.1999.tb08764.x