Association of metronidazole resistance and natural competence in Helicobacter pylori.

Abstract:

:To study whether the capability of horizontal DNA transfer is associated with metronidazole resistance in Helicobacter pylori, a total of 81 clinical isolates were tested for MICs of metronidazole (MTZ). The MIC assays were performed by using the E-test and reconfirmed by the agar dilution method. Natural competence assays were performed by transferring a chloramphenicol acetyltransferase cassette and a 23S rRNA gene from a clarithromycin-resistant strain (with an A-to-G mutation at nucleotide 2143) by using natural transformation. Of the 81 isolates, 65 (80.2%) were naturally competent while 16 were not. Among the 65 naturally competent strains, 39 (60%) were highly resistant to MTZ (MICs, >32 microg/ml) while only 2 of 16 (12.5%) noncompetent strains were highly MTZ resistant (P, <0.001). Therefore, there is an association between natural competence and MTZ resistance.

authors

Yeh YC,Chang KC,Yang JC,Fang CT,Wang JT

doi

10.1128/aac.46.5.1564-1567.2002

subject

Has Abstract

pub_date

2002-05-01 00:00:00

pages

1564-7

issue

5

eissn

0066-4804

issn

1098-6596

journal_volume

46

pub_type

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