A Novel Extended-Spectrum TEM-Type β-Lactamase, TEM-138, from <i>Salmonella enterica</i> Serovar Infantis

Chedly Chouchani, Renaud Berlemont, Afef Masmoudi, Moreno Galleni, Jean‐Marie Frère, Omrane Belhadj, Kamel Ben‐Mahrez

Antimicrobial Agents and Chemotherapy · 2006 · 19 citations · 17 references

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Abstract

A novel natural TEM beta-lactamase with extended-spectrum activity, TEM-138, was identified in a ceftazidime-resistant clinical isolate of Salmonella enterica serovar Infantis. Compared to TEM-1, TEM-138 contains the following mutations: E104K, N175I, and G238S. The bla(TEM-138) gene was located on a 50-kb transferable plasmid. Expression studies with Escherichia coli revealed efficient ceftazidimase and cefotaximase activities for TEM-138.

References

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