<?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>2448-6760</journal-id>
<journal-title><![CDATA[Veterinaria México OA]]></journal-title>
<abbrev-journal-title><![CDATA[Veterinaria México OA]]></abbrev-journal-title>
<issn>2448-6760</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Medicina Veterinaria y Zootecnia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-67602014000100001</article-id>
<article-id pub-id-type="doi">10.21753/vmoa.1.1.331</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Genetic changes detected in the internal genes of porcine influenza viruses isolated in Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Cambios genéticos en los genes internos del virus de influenza porcina aislado en México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrera Aguirre]]></surname>
<given-names><![CDATA[Víctor Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mercado García]]></surname>
<given-names><![CDATA[María del Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trujillo Ortega]]></surname>
<given-names><![CDATA[María Elena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendoza Elvira]]></surname>
<given-names><![CDATA[Susana Elisa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Isa Haspra]]></surname>
<given-names><![CDATA[Pavel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paulin Paz]]></surname>
<given-names><![CDATA[Luis Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arias Ortiz]]></surname>
<given-names><![CDATA[Carlos Federico]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Betancourt]]></surname>
<given-names><![CDATA[José Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Medicina Veterinaria y Zootecnia Departamento de Medicina y Zootecnia de Cerdos]]></institution>
<addr-line><![CDATA[ Distrito Federal]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Estudios Superiores Cuautitlán Unidad de Investigación Multidisciplinaria]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Biotecnología ]]></institution>
<addr-line><![CDATA[Cuernavaca Morelos]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<volume>1</volume>
<numero>1</numero>
<fpage>0</fpage>
<lpage>0</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-67602014000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-67602014000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-67602014000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract To date, only one report has been published in Mexico detailing the genetic changes and evolutionary divergence in the so-called internal genes basic polymerase-one (PB1), basic polymerase-two (PB2), polymerase acid (PA), nucleoprotein (NP), matrix protein (M), and non-structural protein (NS) of the swine influenza virus that circulated during the 2009 pandemic and in 2010. The aim of this study was to evaluate the evolutionary divergence and genetic changes in these internal genes of the swine influenza virus strains isolated in Mexico in 2009-2010. To characterize the evolutionary history and the phylogenetic relationship among the isolated virus strains, a Maximum Likelihood Model Test analysis and a phylogenetic bootstrap test with 1000 replicates were performed. The phylogenetic relationships among the PB1, PB2, PA, NP, M and NS genes correspond to similar swine virus isolates reported in oth­er countries. However, the PA gene from the A/swine/Mexico/Qro35/2010 (H1N1) virus is closely related to a H3N2-subtype human virus. The PB2, NP, and M genes of the Mexican swine influenza viruses that circulated during 2009 and 2010 maintained the distribution of the Triple Reassortant Internal Genes (TRIG). Significantly, our study demonstrates the presence of a hu­man H3N2 virus PA gene in the A/swine/Mexico/Qro35/2010 (H1N1) virus.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Hasta el momento, en México sólo se ha publicado un reporte en el que se detallan los cambios genéticos y la divergencia evolutiva en los llama­dos genes internos de la polimerasa básica 1 (PB1), polimerasa básica 2 (PB2), polimerasa ácida (PA), nucleoproteína (NP), proteína de matriz (M) y la proteína no estructural (NS) del virus de influenza porcina que se ex­tendió durante la pandemia entre 2009 y 2010. El objetivo de este estudio fue evaluar la divergencia evolutiva y los cambios genéticos de las cepas de virus de influenza porcina aisladas en México entre los años 2009-2010. Para caracterizar la historia evolutiva y la relación filogenética entre las cepas de virus aisladas, se utilizó una prueba de probabilidad de máxima verosimilitud usando un bootstrap filogenético con 1000 réplicas. La relación filogenética entre los genes PB1, PB2, PA, NP M y NS corresponde a aislamientos de virus porcinos similares a los consignados en otros países. Sin embargo, el gen PA del virus A/swine/Mexico/Qro35/2010 (H1N1) está estrechamente relacionado a un subtipo viral H3N2 humano. Los genes PB2, NP y M de los virus de influenza porcina mexicanos que proliferaron durante 2009 y 2010, configuran su distribución de acuerdo con los genes internos triplemente recombinantes (TRIG). En nuestro estudio se demuestra la presencia de un gen de PA de un virus humano H3N2 en la cepa de virus porcino A/swine/ Mexico/Qro35/2010 (H1N1).]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Swine influenza virus]]></kwd>
<kwd lng="en"><![CDATA[Phylogenetic characterization]]></kwd>
<kwd lng="en"><![CDATA[Internal genes]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="es"><![CDATA[Virus de influenza porcina]]></kwd>
<kwd lng="es"><![CDATA[Caracterización filogenética]]></kwd>
<kwd lng="es"><![CDATA[Genes internos]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
</kwd-group>
</article-meta>
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