First detection of metallo-β-lactamases in nosocomial isolates of Pseudomonas aeruginosa in Alagoas, Brazil
ABSTRACTIntroduction:Pseudomonas aeruginosa is a leading cause of opportunistic infections in humans, and the choice of effective antimicrobial agents to control this bacterium has been limited, mainly due to its ability to produce metallo-β-lactamases (MβL), enzymes capable of inactivating many antimicrobials through hydrolysis.Objective:This study aimed to detect the presence of multidrug-resistant (MDR) P. aeruginosa strains and the MβL-encoding genes (blaSPM, blaIMP and blaVIM) in nosocomial isolates in Maceió (AL).Methods:The isolates were collected from four public institutions/hospitals in Maceió, and cultures were identified by conventional methods. Antibiotic susceptibility was determined by the disk diffusion method according to the Clinical and Laboratory Standards Institute (CLSI), and polymerase chain reaction (PCR) was used to identify the presence of the MβL-encoding genes blaSPM, blaIMP and blaVIM.RESULTS:Forty-three strains of P. aeruginosa were MDR among 85 identified nosocomial isolates (50.6%), 79.1% and 20% of which were resistant to carbapenem (imipenem and meropenem) and aztreonam, respectively. PCR was performed in susceptible or resistant isolates and we identified nine (20.9%) MDR strains with blaSPM gene, whereas only one strain had blaIMP and none blaVIM positive was found.Conclusion:Production of MβL is an important mechanism of resistance to carbapenems and other β-lactams among P. aeruginosa strains in the evaluated samples. We reported the first identification of MβL-encoding genes in P. aeruginosa from nosocomial environments in Maceió, a new insight for the epidemiology of MβL in the Northeastern region of Brazil.
Main Authors: | , , , , , , |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Patologia Clínica
2015
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-24442015000500291 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
oai:scielo:S1676-24442015000500291 |
---|---|
record_format |
ojs |
spelling |
oai:scielo:S1676-244420150005002912015-11-10First detection of metallo-β-lactamases in nosocomial isolates of Pseudomonas aeruginosa in Alagoas, BrazilBarros,Emmily M. L. R.Morais,Viviane M. S.Castro,Karina C. B.Orsi,Alice R.Maranhão,Fernanda C. A.Silva,Zenaldo P.Silva,Denise M. W. Pseudomonas aeruginosa carbapenems β-lactamases ABSTRACTIntroduction:Pseudomonas aeruginosa is a leading cause of opportunistic infections in humans, and the choice of effective antimicrobial agents to control this bacterium has been limited, mainly due to its ability to produce metallo-β-lactamases (MβL), enzymes capable of inactivating many antimicrobials through hydrolysis.Objective:This study aimed to detect the presence of multidrug-resistant (MDR) P. aeruginosa strains and the MβL-encoding genes (blaSPM, blaIMP and blaVIM) in nosocomial isolates in Maceió (AL).Methods:The isolates were collected from four public institutions/hospitals in Maceió, and cultures were identified by conventional methods. Antibiotic susceptibility was determined by the disk diffusion method according to the Clinical and Laboratory Standards Institute (CLSI), and polymerase chain reaction (PCR) was used to identify the presence of the MβL-encoding genes blaSPM, blaIMP and blaVIM.RESULTS:Forty-three strains of P. aeruginosa were MDR among 85 identified nosocomial isolates (50.6%), 79.1% and 20% of which were resistant to carbapenem (imipenem and meropenem) and aztreonam, respectively. PCR was performed in susceptible or resistant isolates and we identified nine (20.9%) MDR strains with blaSPM gene, whereas only one strain had blaIMP and none blaVIM positive was found.Conclusion:Production of MβL is an important mechanism of resistance to carbapenems and other β-lactams among P. aeruginosa strains in the evaluated samples. We reported the first identification of MβL-encoding genes in P. aeruginosa from nosocomial environments in Maceió, a new insight for the epidemiology of MβL in the Northeastern region of Brazil.info:eu-repo/semantics/openAccessSociedade Brasileira de Patologia Clínica Jornal Brasileiro de Patologia e Medicina Laboratorial v.51 n.5 20152015-10-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-24442015000500291en10.5935/1676-2444.20150047 |
institution |
SCIELO |
collection |
OJS |
country |
Brasil |
countrycode |
BR |
component |
Revista |
access |
En linea |
databasecode |
rev-scielo-br |
tag |
revista |
region |
America del Sur |
libraryname |
SciELO |
language |
English |
format |
Digital |
author |
Barros,Emmily M. L. R. Morais,Viviane M. S. Castro,Karina C. B. Orsi,Alice R. Maranhão,Fernanda C. A. Silva,Zenaldo P. Silva,Denise M. W. |
spellingShingle |
Barros,Emmily M. L. R. Morais,Viviane M. S. Castro,Karina C. B. Orsi,Alice R. Maranhão,Fernanda C. A. Silva,Zenaldo P. Silva,Denise M. W. First detection of metallo-β-lactamases in nosocomial isolates of Pseudomonas aeruginosa in Alagoas, Brazil |
author_facet |
Barros,Emmily M. L. R. Morais,Viviane M. S. Castro,Karina C. B. Orsi,Alice R. Maranhão,Fernanda C. A. Silva,Zenaldo P. Silva,Denise M. W. |
author_sort |
Barros,Emmily M. L. R. |
title |
First detection of metallo-β-lactamases in nosocomial isolates of Pseudomonas aeruginosa in Alagoas, Brazil |
title_short |
First detection of metallo-β-lactamases in nosocomial isolates of Pseudomonas aeruginosa in Alagoas, Brazil |
title_full |
First detection of metallo-β-lactamases in nosocomial isolates of Pseudomonas aeruginosa in Alagoas, Brazil |
title_fullStr |
First detection of metallo-β-lactamases in nosocomial isolates of Pseudomonas aeruginosa in Alagoas, Brazil |
title_full_unstemmed |
First detection of metallo-β-lactamases in nosocomial isolates of Pseudomonas aeruginosa in Alagoas, Brazil |
title_sort |
first detection of metallo-β-lactamases in nosocomial isolates of pseudomonas aeruginosa in alagoas, brazil |
description |
ABSTRACTIntroduction:Pseudomonas aeruginosa is a leading cause of opportunistic infections in humans, and the choice of effective antimicrobial agents to control this bacterium has been limited, mainly due to its ability to produce metallo-β-lactamases (MβL), enzymes capable of inactivating many antimicrobials through hydrolysis.Objective:This study aimed to detect the presence of multidrug-resistant (MDR) P. aeruginosa strains and the MβL-encoding genes (blaSPM, blaIMP and blaVIM) in nosocomial isolates in Maceió (AL).Methods:The isolates were collected from four public institutions/hospitals in Maceió, and cultures were identified by conventional methods. Antibiotic susceptibility was determined by the disk diffusion method according to the Clinical and Laboratory Standards Institute (CLSI), and polymerase chain reaction (PCR) was used to identify the presence of the MβL-encoding genes blaSPM, blaIMP and blaVIM.RESULTS:Forty-three strains of P. aeruginosa were MDR among 85 identified nosocomial isolates (50.6%), 79.1% and 20% of which were resistant to carbapenem (imipenem and meropenem) and aztreonam, respectively. PCR was performed in susceptible or resistant isolates and we identified nine (20.9%) MDR strains with blaSPM gene, whereas only one strain had blaIMP and none blaVIM positive was found.Conclusion:Production of MβL is an important mechanism of resistance to carbapenems and other β-lactams among P. aeruginosa strains in the evaluated samples. We reported the first identification of MβL-encoding genes in P. aeruginosa from nosocomial environments in Maceió, a new insight for the epidemiology of MβL in the Northeastern region of Brazil. |
publisher |
Sociedade Brasileira de Patologia Clínica |
publishDate |
2015 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-24442015000500291 |
work_keys_str_mv |
AT barrosemmilymlr firstdetectionofmetalloblactamasesinnosocomialisolatesofpseudomonasaeruginosainalagoasbrazil AT moraisvivianems firstdetectionofmetalloblactamasesinnosocomialisolatesofpseudomonasaeruginosainalagoasbrazil AT castrokarinacb firstdetectionofmetalloblactamasesinnosocomialisolatesofpseudomonasaeruginosainalagoasbrazil AT orsialicer firstdetectionofmetalloblactamasesinnosocomialisolatesofpseudomonasaeruginosainalagoasbrazil AT maranhaofernandaca firstdetectionofmetalloblactamasesinnosocomialisolatesofpseudomonasaeruginosainalagoasbrazil AT silvazenaldop firstdetectionofmetalloblactamasesinnosocomialisolatesofpseudomonasaeruginosainalagoasbrazil AT silvadenisemw firstdetectionofmetalloblactamasesinnosocomialisolatesofpseudomonasaeruginosainalagoasbrazil |
_version_ |
1756427514934198272 |