Phenotypic and molecular analysis of tellurite resistance among enterohemorrhagic Escherichia coli O157:H7 and sorbitol-fermenting O157:NM clinical isolates

Martina Bielaszewska, Phillip I. Tarr, Helge Karch, Wenlan Zhang, Werner Mathys

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58 Scopus citations

Abstract

A total of 66 (98.5%) of 67 enterohemorrhagic Escherichia coli (EHEC) O157:H7 strains had increased potassium tellurite (Te) MICs (32 to 1,024 μg/ml), grew on Te-containing media, and possessed Te resistance (ter) genes, whereas 83 (96.5%) of 86 sorbitol-fermenting (SF) EHEC O157:NM strains had Te MICs of ≤4 μg/ml, did not grow on Te-containing media, and lacked ter genes. Optimal detection of SF EHEC O157:NM strains requires Te-independent strategies.

Original languageEnglish
Pages (from-to)452-454
Number of pages3
JournalJournal of clinical microbiology
Volume43
Issue number1
DOIs
StatePublished - Jan 2005

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