- Fimbria (bacteriology)
bacteriology, fimbria is a proteinaceous appendage in many gram-negativebacteria that is thinner and shorter than a flagellum. This appendage ranges from 3-10 nanometers in diameter and can be up to several micrometers long. Fimbriae are used by bacteria to adhere to one another and to adhere to animal cells. A bacterium can have as many as 1,000 fimbriae. Fimbriae are only visible with the use of an electron microscope.
Fimbriae are one of the primary mechanisms of
virulencefor E. colibacteria. Their presence greatly enhances the bacteria's ability to attach to the host and cause disease.cite journal |author=Connell I, Agace W, Klemm P, Schembri M, Mărild S, Svanborg C |title=Type 1 fimbrial expression enhances Escherichia coli virulence for the urinary tract |journal=Proc. Natl. Acad. Sci. U.S.A. |volume=93 |issue=18 |pages=9827–32 |year=1996 |month=September |pmid=8790416 |pmc=38514 |doi= |url=http://www.pnas.org/cgi/pmidlookup?view=long&pmid=8790416]
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