[Carbapenemases produced by Carbapenem-resistant Pseudomonas aeruginosa isolated from hospitals in Chile]. / Carbapenemasas en aislamientos de Pseudomonas aeruginosa resistentes a carbapenémicos aisladas en hospitales de Chile.
Rev Chilena Infectol
; 38(1): 81-87, 2021 Feb.
Article
en Es
| MEDLINE
| ID: mdl-33844796
ABSTRACT
BACKGROUND:
Carbapenem resistance mediated by carbapenemases in Pseudomonas aeruginosa is an important mechanism; however, loss of porin OprD remains as the most frequent.AIM:
To determine the proportion of P. aeruginosa isolates, resistant to imipenem and/or meropenem, producing carbapenemases, the type of enzyme produced and the genetic relationship between the isolates.METHODS:
One hundred and thirteen resistant to at least one carbapenem isolates, obtained in 12 hospitals and 9 cities in Chile were studied. Additionally, susceptibility to ceftazidime, amikacin, gentamicin, piperacillin/tazobactam, ciprofloxacin and colistin was determined. Carba NP was performed and in the positive isolates carbapenemase genes were detected by PCR. The isolates were typified by restriction with SpeI and PFGE.RESULTS:
Not all isolates produce carbapenemases, and only in 61/113 of them (54%) the blaKPC (32) or blaVIM (29) was amplified. In none of the isolates was found the coharboring of both genes. The pulsotypes indicated no clonal dissemination of the isolates, evidencing an important genetic diversity.CONCLUSIONS:
P. aeruginosa isolates producing carbapenemases, obtained in Chilean hospitals carry blaKPC and blaVIM genes and, mostly, are polyclonal. These results emphasize the importance of carrying out epidemiological studies with a greater number of isolates to allow a better understanding of the epidemiology of carbapenemase-producing P. aeruginosa in Chile.
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Bases de datos:
MEDLINE
Asunto principal:
Pseudomonas aeruginosa
/
Infecciones por Pseudomonas
Límite:
Humans
País/Región como asunto:
America do sul
/
Chile
Idioma:
Es
Revista:
Rev Chilena Infectol
Año:
2021
Tipo del documento:
Article
País de afiliación:
Chile