<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1561-3003</journal-id>
<journal-title><![CDATA[Revista Cubana de Higiene y Epidemiología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cubana Hig Epidemiol]]></abbrev-journal-title>
<issn>1561-3003</issn>
<publisher>
<publisher-name><![CDATA[Centro Nacional de Información de Ciencias MédicasEditorial Ciencias Médicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1561-30032021000100010</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Escherichia coli y Klebsiella pneumoniae productoras de betalactamasas de espectro extendido en un hospital de La Habana]]></article-title>
<article-title xml:lang="en"><![CDATA[Extended-spectrum beta-lactamase-producing Escherichia coli and Klebsiella pneumoniae in a hospital in Havana]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Monté Cepero]]></surname>
<given-names><![CDATA[Lorena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Casanueva]]></surname>
<given-names><![CDATA[Raiza]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Clínico Quirúrgico &#8220;Salvador Allende&#8221;  ]]></institution>
<addr-line><![CDATA[ La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>58</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1561-30032021000100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1561-30032021000100010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1561-30032021000100010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  En microorganismos gramnegativos la producción de enzimas betalactamasas es el mecanismo más común de resistencia. Las de espectro extendido constituyen un grupo importante por su capacidad de inactivar las cefalosporinas de tercera y cuarta generación y el aztreonam. Su detección es vital para indicar el tratamiento óptimo y las medidas de aislamiento que eviten la dispersión de los microorganismos que las portan.  Objetivos:  Determinar la incidencia y principales características de los aislados de Escherichiacoli y Klebsiellapneumoniae productores de betalactamasas de espectro extendido en muestras no urogenitales.  Métodos: Estudio transversal realizado en el hospital &#8220;Salvador Allende&#8221; durante el año 2017. Se determinó la frecuencia de Escherichia coli y Klebsiella pneumoniae productoras de betalactamasas de espectro extendido, su procedencia según servicio del hospital, tipo de muestra clínica, y su sensibilidad antimicrobiana. La identificación de betalactamasas de espectro extendido se hizo por el método de doble disco de Jarlier.  Resultados: Fueron productores de betalactamasas de espectro extendido 46 y 50 % de aislados de Escherichia coli y Klebsiella pneumoniae, respectivamente. La mayoría provenían de muestras de las salas del Instituto de Angiología, el antimicrobiano con mayor efectividad fue el meropenem, la sensibilidad al resto de los antimicrobianos estuvo por debajo de 80 % y no hubo aislados sensibles a las cefalosporinas de tercera generación.  Conclusiones: Se demuestra una alta incidencia de aislados de Escherichia coli y Klebsiella pneumoniae productores de betalactamasas de espectro extendido en el Hospital &#8220;Salvador Allende&#8221; de La Habana, más marcada en las salas del Instituto de Angiología y en muestras de piel.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  Beta-lactamase production is the most common resistance mechanism in gram-negative microorganisms. Extended-spectrum beta-lactamases are an important group of enzymes capable of inactivating third- and fourth-generation cephalosporins and aztreonam. Their detection is important to indicate the optimum treatment as well as isolation measures aimed at preventing the spread of carrier microorganisms.  Objectives:  Determine the incidence and main characteristics of isolates of extended-spectrum beta-lactamase-producing Escherichia coli and Klebsiella pneumoniae from non-urogenital samples.  Methods: A cross-sectional study was conducted at Salvador Allende hospital during the year 2017. Determination was made of the frequency of extended-spectrum beta-lactamase-producing Escherichia coli and Klebsiella pneumoniae, their origin by hospital service, the type of clinical sample and their antimicrobial sensitivity. Identification of extended-spectrum beta-lactamases was based on the Jarlier double disc method.  Results: Of the total Escherichia coli and Klebsiella pneumoniae isolates studied, 46% and 50%, respectively, were extended-spectrum beta-lactamase producers. Most had been obtained from samples taken in wards of the Institute of Angiology; the most effective antimicrobial was meropenem; sensitivity to the remaining antimicrobials was below 80%; no isolates were sensitive to third-generation cephalosporins.  Conclusions: A high incidence was found of extended-spectrum beta-lactamase-producing Escherichia coli and Klebsiella pneumoniae isolates at Salvador Allende Hospital in Havana, more noticeably in Institute of Angiology wards and skin samples.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[E. coli]]></kwd>
<kwd lng="es"><![CDATA[K. pneumoniae]]></kwd>
<kwd lng="es"><![CDATA[betalactamasas de espectro extendido]]></kwd>
<kwd lng="es"><![CDATA[antibióticos betalactámicos]]></kwd>
<kwd lng="en"><![CDATA[E. coli]]></kwd>
<kwd lng="en"><![CDATA[K. pneumonia]]></kwd>
<kwd lng="en"><![CDATA[extended-spectrum beta-lactamases]]></kwd>
<kwd lng="en"><![CDATA[beta-lactam antibiotics]]></kwd>
</kwd-group>
</article-meta>
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