In vitro susceptibility of Yersinia kristensenii strains to β-lactam antibiotics

Béjar, Victoria; Calvo, C.; Cormenzana, Alberto Ramos

doi:10.1016/s0769-2609(86)80022-9

Cited by 7 publications

(2 citation statements)

References 19 publications

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“…In the present study, aminopenicillin-sensitive strains were only detected within the Y. kristensenii group. Bi-or polymodally distributed MICs of several L-lactams were characteristic for this taxon (Table 3) and are in agreement with the broad MIC ranges published in the literature [42,45,46]. The heterogeneity of these MICs indicating strains expressing predominantly class A or class C L-lactamases as well as lowlevel enzyme producers may be a characteristic feature of all species of the Y. kristensenii complex or re£ect its taxonomical heterogeneity [23].…”

Section: Natural Antibiotic Susceptibility Patternssupporting

confidence: 85%

Natural antimicrobial susceptibilities and biochemical profiles ofYersinia enterocolitica-like strains:Y. frederiksenii,Y. intermedia,Y. kristenseniiandY. rohdei

Stock

Wiedemann

2003

FEMS Immunology &Amp; Medical Microbiology

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The natural susceptibility of 131 Yersinia strains of Y. frederiksenii (n=38), Y. intermedia (n=48), Y. kristensenii (n=26) and Y. rohdei (n=19) to 70 antibiotics was tested. Minimum inhibitory concentration (MIC) values were determined with a microdilution procedure in IsoSensitest broth (all strains) and cation-adjusted Mueller Hinton broth (some strains). All species were naturally sensitive or sensitive and of intermediate susceptibility to tetracyclines, aminoglycosides, acylureidopenicillins, numerous cephalosporins, carbapenems, aztreonam, quinolones, chloramphenicol, folate-pathway inhibitors, nitrofurantoin, and fosfomycin. Uniform natural resistance was found with penicillin G, oxacillin, several macrolides, lincosamides, streptogramins, glycopeptides, rifampicin and fusidic acid. Species-specific differences in susceptibility affecting clinical assessment criteria were seen with aminopenicillins (in the presence and absence of beta-lactamase inhibitors), ticarcillin and some cephalosporins. Major medium-dependent susceptibilities were found with fosfomycin. beta-Lactam MIC susceptibility patterns suggested that most strains of the species tested produce both class A and class C (AmpC) beta-lactamases that are characteristic for the species. The present study describes a database concerning the natural susceptibility of some Y. enterocolitica-like species to a wide range of antibiotics, which can be applied to validate forthcoming antibiotic susceptibility tests of these strains and might contribute to their identification. An evaluation of 30 biochemical tests that secured phenotypic identification to the Yersinia species level is presented.

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Section: Natural Antibiotic Susceptibility Patternssupporting

confidence: 85%

Natural antimicrobial susceptibilities and biochemical profiles ofYersinia enterocolitica-like strains:Y. frederiksenii,Y. intermedia,Y. kristenseniiandY. rohdei

Stock

Wiedemann

2003

FEMS Immunology &Amp; Medical Microbiology

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“…A heat-labile factor was assumed necessary for the expression of the amp-gene in pBR 322 [10], Moreover, a recent study provided evidence that Yersi nia kristensii is more resistant at 28 than at 37 °C due to enhanced P-lactamase expres sion at 28 °C [ 1 ].…”

Section: Discussionmentioning

confidence: 99%

Influence of Temperature on Beta-Lactamase Production and Outer Membrane Proteins in Gram-Negative Rods

Cullmann

Dick²

1990

Chemotherapy

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The influence of temperature (ranging from 28 to 42 °C) was studied on the phenotypic expression of chromosomally mediated β-lactamases in gram-negative clinical isolates and in their β-lactamase-derepressed resistant counterparts. The enzymes were expressed most intensely at lower temperatures (28 or 32 °C). In most strains the enzyme was barely detectable at growth temperatures of 42 °C independent of the inducer employed. The release of the enzyme into the surrounding medium was marginal even at a growth temperature of 42 °C. The major outer membrane proteins revealed discrepancies dependent on the growth temperature only for the Providencia rettgeri W 862 strain. Thus, it can be concluded that the phenotypic expression of chromosomal β-lactamase is temperature dependent to the effect that the enzymes are most expressed at 28 or 32 °C. This agrees well with the increased susceptibility to most β-lactams due to the lowered β-lactamase production at higher temperatures. This effect was pronounced most strikingly in Proteus vulgaris.

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Relationships between β-lactamase production and β-lactam susceptibility of environmental strains of Yersinia kristensenii

Ahmedy

Vidon

Labia

et al. 1989

Research in Microbiology

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In vitro susceptibility of Yersinia kristensenii strains to β-lactam antibiotics

Cited by 7 publications

References 19 publications

Natural antimicrobial susceptibilities and biochemical profiles ofYersinia enterocolitica-like strains:Y. frederiksenii,Y. intermedia,Y. kristenseniiandY. rohdei

Natural antimicrobial susceptibilities and biochemical profiles ofYersinia enterocolitica-like strains:Y. frederiksenii,Y. intermedia,Y. kristenseniiandY. rohdei

Influence of Temperature on Beta-Lactamase Production and Outer Membrane Proteins in Gram-Negative Rods

Relationships between β-lactamase production and β-lactam susceptibility of environmental strains of Yersinia kristensenii

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