<?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>0123-4226</journal-id>
<journal-title><![CDATA[Revista U.D.C.A Actualidad & Divulgación Científica]]></journal-title>
<abbrev-journal-title><![CDATA[rev.udcaactual.divulg.cient.]]></abbrev-journal-title>
<issn>0123-4226</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Ciencias Aplicadas y Ambientales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-42262018000100119</article-id>
<article-id pub-id-type="doi">10.31910/rudca.v21.n1.2018.670</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[PRESENCE OF BOVINE LEUKEMIA VIRUS GENOTYPES 1 AND 3 IN ANTIOQUIA, COLOMBIA]]></article-title>
<article-title xml:lang="es"><![CDATA[PRESENCIA DE LOS GENOTIPOS 1 Y 3 DEL VIRUS DE LA LEUCOSIS BOVINA EN ANTIOQUIA, COLOMBIA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Úsuga-Monroy]]></surname>
<given-names><![CDATA[Cristina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz]]></surname>
<given-names><![CDATA[Francisco J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Echeverri-Zuluaga]]></surname>
<given-names><![CDATA[José Julián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Herrera]]></surname>
<given-names><![CDATA[Luis Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Herrera]]></surname>
<given-names><![CDATA[Albeiro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia Faculty of Agricultural Sciences Biodiversity and Molecular Genetics Group]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Antioquia Faculty of Medicine Immunovirology Group]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Colombia Faculty of Agricultural Sciences Biodiversity and Molecular Genetics Group]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional de Colombia Faculty of Agricultural Sciences Biodiversity and Molecular Genetics Group]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Nacional de Colombia Faculty of Agricultural Sciences Biodiversity and Molecular Genetics Group]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>21</volume>
<numero>1</numero>
<fpage>119</fpage>
<lpage>126</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-42262018000100119&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-42262018000100119&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-42262018000100119&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY Bovine leukemia virus (BLV) is an immunosuppressant retrovirus that primarily affects dairy livestock, its target cells are B lymphocytes in which it integrates its genome infecting cattle for life. It is important to identify the distribution of the BLV in the region and to reconstruct its evolutionary history through phylogenetic trees, for the province of Antioquia this is the first report of the BLV genotypes. The aim of this study was to identify the genotype of BLV circulating in dairy cattle of different regions of the province of Antioquia, Colombia. DNA was extracted from 8 Holstein cows. Nested PCR was performed to amplify a fragment of 444 pb of the env gene. The env viral gene codes for surface protein gp51, gene is highly conserved and it is used for phylogenetic analysis. Obtained amplicons were sequenced, manually aligned in MEGA V7 program, and compared to 53 viral env gene sequences registered in GenBank. Phylogenetic analysis was performed by Maximum Likelihood and Bayesian methods. Two circulating genotypes were found: the most common genotype was 1, found in seven samples; they grouped with sequences from EE. UU, Argentina and Japan; only one sample was classified as genotype 3 and was grouped with samples from EE. UU and Japan. At least two genotypes (1 and 3) of BLV are circulating in Antioquia; however, more cattle and herds should be evaluated to elucidate the diversity and distribution of BLV in Colombia.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El virus de la leucosis bovina (BLV) es un retrovirus inmuno-supresor que afecta, principalmente, al ganado lechero; sus células diana son los linfocitos B, en los cuales, integra su genoma, infectando al ganado de por vida. Es importante identificar la distribución del BLV en la región y reconstruir su historia evolutiva, a través de árboles filogenéticos; para el departamento de Antioquia, este es el primer reporte de los genotipos del BLV. El objetivo de este estudio fue identificar el genotipo de BLV que circula en ganado lechero de diferentes regiones del departamento de Antioquia, Colombia. Se extrajo ADN de 8 vacas Holstein. Se realizó una PCR anidada, para amplificar un fragmento del gen env de 444 pb. El gen env viral codifica la proteína de superficie gp51, altamente conservado y es usado en análisis filogenéticos. Los amplicones obtenidos se secuenciaron, se alinearon manualmente en el programa MEGA V7 y se compararon con 53 secuencias del gen env viral, registradas en GenBank. El análisis filogenético, se realizó por métodos de Máxima Verosimilitud y Bayesianos. Se encontraron dos genotipos circulantes: el genotipo más común fue 1, hallado en siete muestras, agrupadas con secuencias de EE. UU, Argentina y Japón; solo una muestra se clasificó como genotipo 3 y se agrupó con muestras de EE. UU y Japón. Al menos dos genotipos (1 y 3) de BLV están circulando en Antioquia; sin embargo, se deben evaluar más bovinos y hatos para elucidar la diversidad y la distribución de BLV en Colombia.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Antioquia]]></kwd>
<kwd lng="en"><![CDATA[BLV]]></kwd>
<kwd lng="en"><![CDATA[Colombia]]></kwd>
<kwd lng="en"><![CDATA[Env gene]]></kwd>
<kwd lng="en"><![CDATA[Genotype]]></kwd>
<kwd lng="en"><![CDATA[Phylogenetic analysis.]]></kwd>
<kwd lng="es"><![CDATA[Análisis filogenético]]></kwd>
<kwd lng="es"><![CDATA[Antioquia]]></kwd>
<kwd lng="es"><![CDATA[BLV]]></kwd>
<kwd lng="es"><![CDATA[Colombia]]></kwd>
<kwd lng="es"><![CDATA[Genotipo]]></kwd>
<kwd lng="es"><![CDATA[Gen env.]]></kwd>
</kwd-group>
</article-meta>
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