<?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>2011-0839</journal-id>
<journal-title><![CDATA[Universitas Medica]]></journal-title>
<abbrev-journal-title><![CDATA[Univ. Med.]]></abbrev-journal-title>
<issn>2011-0839</issn>
<publisher>
<publisher-name><![CDATA[Pontificia Universidad Javeriana]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2011-08392021000100005</article-id>
<article-id pub-id-type="doi">10.11144/javeriana.umed62-1.xper</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Xpert MTB/RIF Ultra: innovación en el diagnóstico de la tuberculosis]]></article-title>
<article-title xml:lang="en"><![CDATA[Xpert MTB/RIF Ultra: Innovation for Diagnosis of Tuberculosis]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Lugo]]></surname>
<given-names><![CDATA[Diego Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villamil Castañeda]]></surname>
<given-names><![CDATA[Lina Paola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lasso Apráez]]></surname>
<given-names><![CDATA[Javier Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garzón Herazo]]></surname>
<given-names><![CDATA[Javier Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Celis Preciado]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Pontificia Universidad Javeriana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Pontificia Universidad Javeriana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Pontificia Universidad Javeriana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Pontificia Universidad Javeriana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Pontificia Universidad Javeriana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>62</volume>
<numero>1</numero>
<fpage>46</fpage>
<lpage>60</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S2011-08392021000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S2011-08392021000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S2011-08392021000100005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La tuberculosis (TB) es una enfermedad infecciosa con alta mortalidad en el mundo, y por ello se considera un problema de salud pública. La dificultad para su diagnóstico, sobre todo en países de bajos y medianos ingresos, limita su erradicación. El Xpert MTB/RIF, que es una prueba molecular, provee un diagnóstico rápido e informa sobre la presencia de cepas resistentes a la rifampicina, lo que permite iniciar un tratamiento oportuno y eficaz. Sin embargo, tiene problemas para el diagnóstico de casos paucibacilares y se han reportado falsos positivos en cuanto a la resistencia a rifampicina y en pacientes con antecedente de TB. Por esto, ha aparecido el Xpert MTB/RIF Ultra, que ha mostrado mejor sensibilidad para el diagnóstico de la TB, sobre todo en casos paucibacilares, y disminución de falsos positivos para resistencia a rifampicina, siendo la prueba molecular más recomendada por la Organización Mundial de la Salud. Teniendo en cuenta lo anterior, se espera que mejore el diagnóstico de la enfermedad y que dé la oportunidad de iniciar el tratamiento de forma oportuna. Con una revisión de la literatura se buscaron los aspectos por mejorar en el diagnóstico de la tuberculosis, características y rendimiento del Xpert MTB/RIF y Xpert MTB/RIF Ultra para formas pulmonares y extrapulmonares y para la detección de la resistencia a la rifampicina.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Tuberculosis (TB) is and infectious disease with a high mortality and is a great challenge for public health worldwide. Among the problems for its eradication, diagnosis represents a major challenge, particularly in low- and middle-income countries. The Xpert MTB/RIF is an automated molecular test; it yields a rapid diagnosis and screens for the presence of rifampin resistance, permitting an early and efficient treatment. However, it has a low sensitivity in patients with paucibacillary disease, and false positives for rifampin resistance and TB in patients with past medical history of TB have been reported. This is the reason why Xpert MTB/RIF Ultra was developed, which has an improved sensitivity for the diagnosis of tuberculosis, especially in paucibacillary cases, and a decrease in false positives for rifampicin resistance; nowadays it is the most recommended molecular test by the World Health Ornanization (WHO), hoping to reduce the time to diagnosis and treatment. This review article analyzes the challenges of improving the diagnosis of tuberculosis, the characteristics and performance of Xpert MTB/RIF and Xpert MTB/RIF Ultra for pulmonary and extrapulmonary forms and for the detection of rifampicin resistance.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[tuberculosis]]></kwd>
<kwd lng="es"><![CDATA[tuberculosis pulmonar]]></kwd>
<kwd lng="es"><![CDATA[técnicas de diagnóstico molecular]]></kwd>
<kwd lng="es"><![CDATA[rifampicina]]></kwd>
<kwd lng="es"><![CDATA[Xpert MTB/RIF]]></kwd>
<kwd lng="en"><![CDATA[tuberculosis]]></kwd>
<kwd lng="en"><![CDATA[tuberculosis, pulmonary]]></kwd>
<kwd lng="en"><![CDATA[molecular diagnostic techniques]]></kwd>
<kwd lng="en"><![CDATA[rifampin]]></kwd>
</kwd-group>
</article-meta>
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