NDLI: Extended-spectrum beta-lactamase-producing bacteria are not detected in supragingival plaque samples from human fecal carriers of ESBL-producing Enterobacteriaceae

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Extended-spectrum beta-lactamase-producing bacteria are not detected in supragingival plaque samples from human fecal carriers of ESBL-producing Enterobacteriaceae

Content Provider	Taylor & Francis Online
Author	Handal, Trude Jenum, Pål Arne Sundsfjord, Arnfinn Olsen, Ingar Bjørang, Ola Søraas, Arne
Abstract	BackgroundThe prevalence of infections caused by Cefotaximase-Munich (CTX-M)-type extended-spectrum beta-lactamase-producing Enterobacteriaceae (ESBL-E) has rapidly increased during the past 15 years. Enterobacteriaceae are commonly found in the gastrointestinal tract and long-term intestinal carriage is considered important for the spread of ESBL and as a source of clinical infections. Oral biofilm such as supragingival plaque is known to contain numerous antibiotic resistance determinants and may also represent a poorly investigated site for ESBL carriage and further spread.ObjectiveTo investigate possible carriage of ESBL-producing bacteria in supragingival plaque of known fecal carriers of these bacteria.DesignWe screened for the presence of aerobic and anaerobic ESBL-producing bacteria and bla CTX-M in supragingival plaque samples from healthy human adults with culture-verified fecal carriage of CTX-M-producing Escherichia coli. The presence or absence of Enterobacteriaceae and ESBL-producing bacteria in plaque samples was evaluated using culture-based methods and consensus CTX-M PCR.ResultsOral samples were obtained from 17 participants with known previous carriage of ESBL-producing E. coli. No ESBL-producing bacteria or ESBL genes were detected using culture-based and molecular methods. One colony of Rahnella aquatilis harboring the class A ESBL gene bla RAHN-1/2 was identified in an oral sample from one of the participants.ConclusionThis pilot study supports the notion that the presence of CTX-M-producing bacteria is uncommon in oral plaque of healthy human adult fecal carriers. Due to the limited number of persons tested, a low prevalence of oral ESBL-carriage in healthy adults or carriage in selected groups of patients cannot be excluded. To our knowledge, this is the first description of an R. aquatilis with the RAHN-1/2 gene in the oral cavity.
File Format	PDF HTM / HTML
ISSN	20002297
DOI	10.3402/jom.v6.24026
Journal	Journal of Oral Microbiology
Volume Number	6
Issue Number	1
Language	English
Publisher	Taylor & Francis
Publisher Date	2014-08-20
Access Restriction	Open
Subject Keyword	CTX-M Oral carriage Extended-spectrum β-lactamase Enterobacteriaceae
Content Type	Text
Resource Type	Article
Subject	Microbiology (medical) Dentistry Infectious Diseases 3500/3501

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Extended-spectrum beta-lactamase-producing bacteria are not detected in supragingival plaque samples from human fecal carriers of ESBL-producing Enterobacteriaceae