Fimbria


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fimbria

[′fim·brē·ə]
(anatomy)

Fimbria

 

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.

A. A. IMSHENETSKII

References in periodicals archive ?
Reevaluation of the interpretation of annuli from otoliths of a long-lived fish, Anoplopoma fimbria. Fish.
Preliminary study on the relationship between tubal intraepithelial carcinoma of the fimbria and pelvic high-grade serous carcinoma.
Lee et al., "The tubal fimbria is a preferred site for early adenocarcinoma in women with familial ovarian cancer syndrome," The American Journal of Surgical Pathology, vol.
Biology of eggs, larvae, and epipelagic juveniles of Sablefish, Anoplopoma fimbria, in relation to their potential use in management.
Pubescence of the body generally whitish, dorsal side of head and thorax with a brownish tinge, paraocular region with black hairs, vertex with intermixed black hairs; anal fimbria brown; tibial scopa with anterior margin white, posterior margin brownish, hairs distinctly plumose.
These include: (i) the recognition that both heat-labile and heat-stable enterotoxins (LT and ST) were separate enterotoxin, (ii) the recognition of ETEC as an important pathogen in parts of the U.S., (iii) the discovery of pili (fimbria) as a critically important virulence factor for ETEC, and (iv) the important role of ETEC in the diarrhoea of travellers.
Sablefish or blackcod, Anoplopoma fimbria, a marine species of the shelf and slope of the North Pacific Ocean, are found in commercial quantities from northern Mexico to Alaska and as far west as eastern Siberia (Kimura et al., 1998; Low et al.
Designations F18ab and F18ac for related fimbria types F107 2134P and 8813 of Escherichia coli from porcine postweaning diarrhea and from oedema disease.
Peritoneal shunt for hydrocephalus, utilizing the fimbria of the fallopian tube for entrance to the peritoneal cavity.
Solo falta la deposicion concluyente, la fimbria de remate: no acierta con el final de la historia.
Aunque las causas de este fenomeno se deben determinar, varios autores proponen que la presencia de glucosa en los medios de cultivo provoca la represion catabolica de la expresion de la fimbria K99 en algunas cepas de ECET F5+ (Girardeau et al., 1982b; Isaacson et al., 1983).
Hairs: yellowish brown (with orange hue in fresh specimens) on T2-T6 and on metasomal sterna; prepygidial fimbria orange.