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New Microbes New Infect. 2014 Nov;2(6):173-4. doi: 10.1002/nmi2.60. Epub 2014 Sep 22.

Identification of OXA-23 carbapenemases: novel variant OXA-239 in Acinetobacter baumannii ST758 clinical isolates in Mexico.

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Departamento de Diagnóstico Epidemiológico, Centro de Investigaciones sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública Cuernavaca, Morelos, Mexico.
Hospital de Oncología, IMSS-CMN-Siglo XXI Mexico City, Mexico.
Hospital de Cardiología, IMSS-CMN-Siglo XXI Mexico City, Mexico.


A collection of 15 carbapenem-resistance Acinetobacter baumannii clinical isolates was analysed on two tertiary hospitals in Mexico. The OXA-51 was identified in all isolates, followed by OXA-239 and OXA-58; OXA-239 is described as a new OXA-23-like allele. These carbapenemases were identified on four clonal groups, distributed between two neighbouring hospitals. Acinetobacter baumannii is poorly studied in Mexico; this situation urges the implementation of strategies to prevent its dissemination.


carbapenem resistance; clonal dissemination; multidrug resistance; nosocomial infection; β-lactam antibiotics

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