Bacteroides fragilis

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Related to Bacteroides fragilis: Clostridium difficile, clostridium perfringens, E coli

Bac·te·roi·des frag·'i·lis

a bacterial species found in human and animal intestinal tracts. Although it represents only about 10-20% of Bacteroides species found in the colon, it is the primary species associated with intraabdominal abscesses and other subdiaphragmatic infections in humans, including peritonitis, rectal abscess, abdominal surgical wounds, and urogenital tract infection. Its capsule is capable of inducing abscess formation independently; characteristically, this species produces a β-lactamase that inactivates β-lactam antibiotics such as the penicillin and cephalosporin groups; it is the type species of the genus, Bacteroides.

Bacteroides fragilis

A gram-negative anaerobe which is a frequent isolate in anaerobic cultures; it is associated with abscesses, aspiration pneumonia, endocarditis, septic arthritis and empyema.

Bacteroides fragilis

Microbiology A gram-negative anaerobe which is a frequent isolate in anaerobic cultures; it is associated with abscesses, aspiration pneumonia, endocarditis, septic arthritis and empyema

Bac·te·roi·des frag·i·lis

(bak-tēr-oy'dēz fraj'i-lis)
A species that is one of the predominant organisms in the lower intestinal tract of humans and other animals; also found in specimens from appendicitis, peritonitis, rectal abscesses, pilonidal cysts, surgical wounds, and lesions of the urogenital tract. It is the type species of the genus Bacteroides.
Bacteroides fragilis anaerobic lower-intestine organism; may contaminate chronic lower-limb wounds


a genus of the family Bacteroidaceae, a family of gram-negative, non-spore-forming, obligate anaerobes. Common inhabitants of the alimentary tract and necrotic tissue, probably as secondary invaders.

Bacteroides amylophilus
Bacteroides asaccharolyticus
Bacteroides fragilis
occasionally infects foals, pigs, lambs and calves, causing diarrhea, mastitis and abscesses.
Bacteroides gingivalis
Bacteroides heparinolyticus
Bacteroides levii
see Porphyromonaslevii.
Bacteroides melaninogenicus
see Prevotellamelaninogenica.
Bacteroides nodosus
Bacteroides ruminicola
see Prevotellaruminicola.
Bacteroides salivosus
see Porphyromonassalivosus.
Bacteroides succinogenes
Bacteroides ureolyticus
gram-negative, microaerophilic bacterial species isolated from the genital tract of mares with endometritis.
References in periodicals archive ?
A new subtype of the metalloprotease toxin gene and the incidence of the three bft subtypes among Bacteroides fragilis isolates in Japan.
Effect of the oral intake of yogurt containing Bifidobacterium longum BB536 on the cell numbers of enterotoxigenic Bacteroides fragilis in microbiota.
actinomycetemcomitans 7,3 0,3 Eikenella corrodens 6,3 20,7 Prevotella intermedia 4,2 5,4 Bacteroides fragilis 4,6 00 Capnocytophaga sp 4,7 00 Campylobacter sp 7,2 7,5 Helicobacter pylori 2,5 6,3 Haemophilus aphrophilus 6,3 2,1 Eubacterium sp 5,6 6,3 Eubacterium nodatum 0,9 00 Actinomyces israelii 0,8 1,8 Actinomyces naeslundii 1 0,9 Peptostreptococcus anaerobius 1,3 00 Peptostreptococcus micros 2,3 0,3 Staphylococcus aureus 5,2 00 Streptococcus viridans 16,2 38,7 E.
Bacteroides fragilis is an obligate anaerobe which will appear as a gram negative bacillus on a gram stain.
Metabolism of paeoniflorin and related compounds by human intestinal bacteria, II: structures of 7S- and 7R-paeonimetabolines I and II formed by Bacteroides fragilis and Lactobacillus brevis.
Key Words: Bacteroides fragilis, vertebral osteomyelitis, spondylodiscitis, anaerobic bacteria
Owing to improvements in our ability to obtain and preserve anaerobic cultures, an increasing number of anaerobic bacteria have been isolated from PTA cultures, including Bacteroides fragilis and Bacteroides melaninogenicus, a common oral anaerobe.
She received peritoneal drainage, from which P acnes and Bacteroides fragilis were cultured.
Complicated intra-abdominal infections: Due to Escherichia coli, Clostridium clostridioforme, Eubacterium lentum, Peptostreptococcus species, Bacteroides fragilis, Bacteroides distasonis, Bacteroides ovatus, Bacteroides thetaiotaomicron, or Bacteroides uniformis.
We previously reported a 2013 case of intraabdominal abscesses and bacteremia caused by a multidrugresistant anaerobe identified as Bacteroides fragilis (1).
Gram negative bacteria: Participants' disclosures on the top three gram negative bacteria, relating to their work in bacterial diagnostics Options: Acinetobacter species, Actinobacillus species, Bacteroides fragilis, Bacteroides sp.