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a long, thin, straight appendage of hydrophobic protein present in large numbers, sometimes as many as several thousand, on the cell surface of gram-negative bacteria. A fimbria measures as much as 12 micrometers in length and less than 100 angstroms in width. It is much finer and shorter than a flagellum. Male bacterial cells (donors) may have one to three sex fimbriae, or pili, that attach themselves to female cells (recipients) to form hollow bridges through which DNA may be transferred during bacterial conjugation. Fimbriae may be found in both motile and nonmotile bacteria. They usually originate from the basal granule in the cytoplasmatic membrane and pass to the exterior through the cell wall. Fimbriae enable a bacterial cell to adhere indiscriminately to solid surfaces of cells and tissues.


References in periodicals archive ?
Fimbriate to afimbirate switch can be mediated by FimE gene product at twice magnitude frequency than FimB gene product, providing an efficient mechanism of rapidly ending fimbriae synthesis in reply to suitable environmental stimuli.
Tubaric fimbriae entrapment, however uncommon, should be considered in female patients with a malfunctioning peritoneal dialysis catheter, especially in patients with complex abdominal anatomy and when other common causes can be excluded.
Fimbriae and Pili are interchangeable terms used to designate short, hair-like structures on the surfaces of bacterial cells.
This association or bacterial adherence, essential for colonization and pathogenicity, is established through the virulence factors that like the fimbriae facilitate colonization, maintenance, and protection of the bacterial species in the host.
7 Development of three subequal and ascending branches per node; fimbriae on culm leaves 4-7 mm long; some populations develop oral setae on culm leaves.
coli bacteria, called fimbriae, are starting to stick to the inside of your bladder wall," says Amy Howell of Rutgers University in Chatsworth, New Jersey.
A recent, serendipitous discovery, resulting from pathology examination of tissues removed during prophylactic salpingo-oophorectomy in patients with BRCA mutations, was that serous "ovarian" cancers actually arise from the fimbriae of the fallopian tubes.
Results suggest that egg antibodies specific for the F18 fimbriae is a suitable immunotherapeutic agent for pigs infected with F18+ E.
23,24) They can be divided into two functional groups: factors that aid in the attachment of the organism to host cells, which are the fimbriae and flagella; and factors that aid in the invasion of tissue and the inhibition of the immune response.