Evolutionary dynamics of carbapenem-resistant Acinetobacter baumannii circulating in Chilean hospitals

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Andrés Opazo-Capurro

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Microbiology

Iván San Martín

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Microbiology

Mario Quezada-Aguiluz

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Microbiology

Felipe Morales

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Microbiology

Mariana DomĂ­nguez-YĂ©venes

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Microbiology

Celia A. Lima

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Microbiology

Fernanda Esposito

Louise Cerdeira

Helia Bello-Toledo

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Microbiology

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Nilton Lincopan

Gerardo González-Rocha

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Microbiology

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We analyze the evolutionary dynamics of ninety carbapenem-resistant Acinetobacter baumannii (CRAB) isolates collected between 1990 and 2015 in Chile. CRAB were identified at first in an isolate collected in 2005, which harbored the ISAba1-blaOXA-69 arrangement. Later, OXA-58- and OXA-23-producing A. baumannii strains emerged in 2007 and 2009, respectively. This phenomenon was associated with variations in the epidemiology of OXA-type carbapenemases, linked to nosocomial lineages belonging to ST109 (CC1), ST162 (CC79), ST15 (CC15) and ST318 (CC15).

Microbiology
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