Epidémiologie des infections à Bacteroides du groupe fragilis en France

Patey, O.; Breuil, J.; Prazuck, T.; Malkin, Jean-Elie; Ouédraogo, Laurent; Dublanchet, A.; Lafaix, C

doi:10.1016/s0399-077x(05)81216-8

Médecine et Maladies Infectieuses

1992

DOI: 10.1016/s0399-077x(05)81216-8

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Epidémiologie des infections à Bacteroides du groupe fragilis en France

O. Patey¹,

J. Breuil²,

T. Prazuck³

et al.

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Cited by 7 publications

(3 citation statements)

References 12 publications

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“…1) despite the low incidence of this organism among bloodstream isolates (ca. 3%) (14,17). Of the four patients, only patients A (kidney carcinoma) and D (colic adenocarcinoma), both admitted for a subocclusive syndrome, were likely to develop B. fragilis bacteremia.…”

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“…Accordingly, B. fragilis bacteremia originates much more frequently from abdominal (60 to 70%) rather than pelvic (3 to 5%) processes (patient B, cervical cancer) and almost never from respiratory disease (patient C, bronchial epidermoid carcinoma) (7-9, 14, 17). Nevertheless, all four patients had risk factors for B. fragilis bacteremia that included malignancy and use of immunosuppressive therapy (14,17).…”

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Cross-Infection Due to Imipenem-Resistant Bacteroides fragilis Associated with a Totally Implantable Venous Port

Arpin¹,

Dubois²,

Rogues

et al. 2002

J Clin Microbiol

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Cross-Infection Due to Imipenem-Resistant Bacteroides fragilis Associated with a Totally Implantable Venous Port

Arpin¹,

Dubois²,

Rogues

et al. 2002

J Clin Microbiol

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“…fragilis is the anaerobe most frequently isolated from human infections (8,33) and may constitute up to 60% of pathogenic anaerobic isolates from hospitalized patients (20). Apart from its resistance traits to various antibiotics (25), the species B. fragilis appears phenotypically homogeneous; however, DNA-DNA hybridization experiments have shown that it separates into two DNA homology groups, I and II, which have ca.…”

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Genotypic identification of two groups within the species Bacteroides fragilis by ribotyping and by analysis of PCR-generated fragment patterns and insertion sequence content

et al. 1995

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Molecular typing allowed the separation of the species Bacteroides fragilis into two genotypically distinct groups. A unique set of 50 strains of B. fragilis carrying the chromosomal metallo-␤-lactamase gene cfiA was subjected to a comparative analysis with respect to sets of up to 250 randomly collected strains devoid of this gene. The two groups were found to be distinct on the basis of the following results: (i) ribotyping, after DNA digestion with AvaI, revealed a practically homogeneous DNA fragment pattern for the cfiA-positive strains and distinct multiple patterns for the cfiA-negative strains; (ii) PCR, arbitrarily primed with an experimentally selected decamer, generated fragment patterns typical for the strains of each group; (iii) the three insertion sequences described to date in the species B. fragilis, i.e., IS4351, IS942, and IS1186, were all but confined to the cfiA-positive group, in which they were capable of providing promoter sequences for the transcription of cfiA; and (iv) the cepA gene, encoding the so-called endogenous cephalosporinase of B. fragilis, was found exclusively in the cfiA-negative group, in which it was present in ca. 70% of the strains. The cfiA-, cepA-negative fraction was not characterized further. In a natural population of 500 randomly selected strains of B. fragilis, the cfiA-positive and cfiA-negative groups represented ca. 3 and 97% of the strains, respectively. Analysis of 82 metabolic traits revealed no difference between the two groups.The genus Bacteroides sensu stricto, which is part of the Cytophaga-Flavobacter-Bacteroides phylum (10), is distant, in evolutionary terms, from most other bacteria of medical interest and appears to be one that evolves rather rapidly (41). According to a proposal by Shah and Collins (34), it has been restricted to 10 closely related species, with Bacteroides fragilis as the type species.B. fragilis is the anaerobe most frequently isolated from human infections (8, 33) and may constitute up to 60% of pathogenic anaerobic isolates from hospitalized patients (20). Apart from its resistance traits to various antibiotics (25), the species B. fragilis appears phenotypically homogeneous; however, DNA-DNA hybridization experiments have shown that it separates into two DNA homology groups, I and II, which have ca. 65 to 70% intergroup and 80 to 90% intragroup homology (15,16). Strains belonging to group II have been reported to be less susceptible than those of group I to the synergistic inhibitory effect of clavulanic acid and ␤-lactam antibiotics (3, 43).Two chromosomal cephalosporinase genes, considered to be species specific, have been described in B. fragilis; these are cepA (32), coding for an enzyme related to the ␤-lactamases of class A (2), and cfiA (38), also called ccrA (26), coding for a metallo-␤-lactamase of class B (1). Neither gene is consistently expressed in naturally occurring strains of B. fragilis. High-level expression of the so-called endogenous cephalosporinase gene cepA has been studied recently by Rogers et al. (32...

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L'antibiogramme des bactéries anaérobies stricts

Dubreuil

1995

Revue Française des Laboratoires

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Epidémiologie des infections à Bacteroides du groupe fragilis en France

Cited by 7 publications

References 12 publications

Cross-Infection Due to Imipenem-Resistant Bacteroides fragilis Associated with a Totally Implantable Venous Port

Cross-Infection Due to Imipenem-Resistant Bacteroides fragilis Associated with a Totally Implantable Venous Port

Genotypic identification of two groups within the species Bacteroides fragilis by ribotyping and by analysis of PCR-generated fragment patterns and insertion sequence content

L'antibiogramme des bactéries anaérobies stricts

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