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J Antimicrob Chemother. 1996 Mar;37(3):457-64.

Mobile rRNA methylase genes coding for erythromycin resistance in Actinobacillus actinomycetemcomitans.

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1
Department of Pathobiology, University of Washington, Seattle 98195, USA.

Abstract

We found that 17 (68%) of 25 Actinobacillus actinomycetemcomitans isolated from periodontally diseased sites had MICs of erythromycin > or = 8 mg/L. The isolates were hybridized with five rRNA methylase genes and gene mobility was determined. Twenty-four (96%) of 25 isolates hybridized with one or more rRNA methylase genes. Representative isolates were able to transfer erythromycin resistance to Haemophilus influenzae and Enterococcus faecalis recipients. The transconjugants were shown to carry rRNA methylase genes by DNA probe hybridization and had MICs of erythromycin 32 to 256 mg/L.

PMID:
9182102
DOI:
10.1093/jac/37.3.457
[Indexed for MEDLINE]

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