Journal Article

β-Lactamase Production by Oral Pigmented <i>Prevotella</i> Species Isolated from Young Children

E. Könönen, S. Nyfors, J. Máttö, S. Asikainen and H. Jousimies Somer

in Clinical Infectious Diseases

Published on behalf of Infectious Diseases Society of America

Volume 25, issue Supplement_2, pages S272-S274
Published in print September 1997 | ISSN: 1058-4838
Published online September 1997 | e-ISSN: 1537-6591 | DOI: http://dx.doi.org/10.1086/516208
β-Lactamase Production by Oral Pigmented Prevotella Species Isolated from Young Children

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The frequency of β-lactamase production by oral pigmented Prevotella species isolated from 23 healthy young children and the minimal inhibitory concentrations (MICs) for 186 available β-lactamasepositive isolates were examined by using the chromogenic cephalosporin disk test (AB BIODISK, Solna, Sweden) and the Etest (AB BIODISK) and/or the agar dilution method of the National Committee for Clinical Laboratory Standards (Villanova, PA, USA), respectively. b-Lactamase-positive Prevotella melaninogenica strains were isolated from all children, and more than two-thirds of the Prevotella denticola and Prevotella loescheii strains isolated from the children were β-lactamase-positive. The blactamase- producing Prevotella intermedia group consisted of Prevotella nigrescens and the P. intermedia/ P. nigrescens-like organism (PINLO); P. intermedia was not found. Only two P. nigrescens isolates but most of the PINLO isolates produced β-lactamase. The MICs for β-lactamase-producing strains varied between 0.38 and 64 μ/mL. β-Lactamase production by oral pigmented Prevotella species colonizing young children is already frequent. The phenomenon should be taken into account in the treatment of pediatric anaerobic infections of oral origin.

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Subjects: Infectious Diseases ; Immunology ; Public Health and Epidemiology ; Microbiology

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