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abr. 2006
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BR1.1
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<i>http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872006000400002&lng=pt&nrm=iso&tlng=es</i>
Transferecia de de ß-lactamasas de espectro extendido desde cepas hospitalarias de Klebsiella pneumoniae a otras especies de enterobacterias
Transference of extended-spectrum ß-lactamases from nosocomial strains of Klebsiella pneumoniae to other species of Enterobacteriaceae
Rev. mÚd. Chile
134
4
0034-9887
tab
Es
En
Fondo Nacional de Desarrollo CientÝfico y Tecnológico
1980109 y #1020454
abr. 2006
20060400
21
Background: Klebsiella pneumoniae is an important pathogenic bacterium, frequently isolated from nosocomial samples, that exhibits wide antimicrobial resistance profiles, including third generation cephalosporins (3GC), aminoglycosides and quinolones. The resistance to 3GC is mainly due to the synthesis of extended spectrum beta lactamases (ESBL), encoded by conjugative plasmids. Aim: To investigate the potential transference of resistance to 3GC from nosocomial strains of K. pneumoniae to other clinical strains of various species of Enterobacteriaceae. Material and methods: The mating experiments were carried out in liquid media and three nosocomial strains of K. pneumoniae were used as donors. These strains were ESBL-producers and resistant to, at least, one of the 3GC assayed. One strain of Citrobacter freundii, Salmonella typhimurium, Serratia marcescens and Escherichia coli, isolated from clinical specimens, were used as recipients. The presence of bla genes was investigated by PCR. Results: The three nosocomial strains of K. pneumoniae were able to transfer the resistance to 3GC and the genes encoding the ESBL to the susceptible recipient strains of enterobacteria. The frequency of transference was as high as 3.2 x 10-2 transconjugants/recipient cell when the strain of Citrobacter freundii was used as recipient. All transconjugants exhibited high level of resistance to the 3GC assayed. Conclusions: Strains of K. pneumoniae isolated from Chilean hospitals are able to disseminate the ESBL genes to clinical strains of others species of Enterobacteriaaceae.(AU)
2006-06-09
20060609
SCIELO
JA
FONTE
428539
<d>BIREME_LXP</d>
<s>S0034-98872006000400002</s>
Sßnchez U., Magaly
<s1>Universidad de Concepción</s1>
<s2>Facultad de Ciencias Biológicas</s2>
<s3>Departamento de MicrobiologÝa. Grupo de Investigación en Resistencia a Antibióticos</s3>
<c>Concepción</c>
<p>Chile</p>
Bello T., Helia
<s1>Universidad de Concepción</s1>
<s2>Facultad de Ciencias Biológicas</s2>
<s3>Departamento de MicrobiologÝa. Grupo de Investigación en Resistencia a Antibióticos</s3>
<c>Concepción</c>
<p>Chile</p>
DomÝnguez Y., Mariana
<s1>Universidad de Concepción</s1>
<s2>Facultad de Ciencias Biológicas</s2>
<s3>Departamento de MicrobiologÝa. Grupo de Investigación en Resistencia a Antibióticos</s3>
<c>Concepción</c>
<p>Chile</p>
Mella M., Sergio
<s1>Universidad de Concepción</s1>
<s2>Facultad de Medicina</s2>
<s3>Departamento de Medicina Interna</s3>
<c>Concepción</c>
<p>Chile</p>
Zemelman Z., Raúl
<s1>Universidad San Sebastißn</s1>
<s2>Facultad de Ciencias y TecnologÝa</s2>
<c>Concepción</c>
<p>Chile</p>
Gonzßlez R., Gerardo
<s1>Universidad de Concepción</s1>
<s2>Facultad de Ciencias Biológicas</s2>
<s3>Departamento de MicrobiologÝa. Grupo de Investigación en Resistencia a Antibióticos</s3>
<c>Concepción</c>
<p>Chile</p>
<f>415</f>
<l>420</l>
79
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| id | oai:netcat:be-dblil-79 |
| institution | UMSS |
| publishDate | abr. 2006 |
| record_format | abcd |
| spellingShingle | Registro ABCD - ID: oai:netcat:be-dblil-79 |
| title | Registro ABCD - ID: oai:netcat:be-dblil-79 |
| url | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872006000400002&lng=pt&nrm=iso&tlng=es |