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Earliest observation of the tetracycline destructase tet(X3)

Grenier, F.; Levesque, S.; Rodrigue, S.; Haraoui, L.-P.

2023-08-30 microbiology
10.1101/2023.08.29.555419 bioRxiv
Show abstract

Tigecycline is an antibiotic of last resort for infections with carbapenem-resistant Acinetobacter baumannii. Plasmids harboring variants of the tetracycline destructase tet(X) promote rising tigecycline resistance rates. We report the earliest observation of tet(X3) in a clinical strain predating tigecyclines commercialization, suggesting selective pressures other than tigecycline contributed to its emergence.

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