<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242018000200387</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v9i2.4232</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Detección molecular y serológica del virus de la leucosis bovina en una población de vacas Holstein, de Colombia]]></article-title>
<article-title xml:lang="en"><![CDATA[Molecular and serological detection of bovine leukemia virus in a population of Holstein cows, from 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[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[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 Facultad de Ciencias Agrarias Grupo de Investigación BIOGEM]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>2</numero>
<fpage>387</fpage>
<lpage>399</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242018000200387&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242018000200387&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242018000200387&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La leucosis bovina enzoótica (LBE) es una enfermedad maligna, sistémica, de alta morbilidad (70 %) y baja mortalidad, ocasionada por la infección con el virus de la leucosis bovina (BLV). La LBE afecta principalmente los bovinos de leche, disminuyendo la producción de leche de 2.5 a 5 % respecto al hato; además, causa inmunosupresión, permitiendo que otros patógenos afecten la producción y reproducción de los animales. El objetivo fue determinar la presencia o ausencia del BLV a través de dos metodologías de diagnóstico: una técnica serológica (ELISA) y una técnica molecular (PCR). Se tomaron 1,000 muestras de sangre de vacas Holstein distribuidas en 10 municipios lecheros del Departamento de Antioquia. Se realizó una PCR para obtener un producto de PCR de 444 pb correspondiente a una región altamente conservada del gen env viral, que codifica para la proteína de envoltura gp51. Se realizó un ELISA indirecta contra la proteína gp51 para estos mismos animales. La PCR detectó un número menor de muestras positivas (474) que la prueba ELISA (546). La sensibilidad de la PCR fue de 74.91 % y su especificidad fue de 85.68 % respecto al ELISA. El grado de concordancia entre pruebas fue moderado (kappa=0.59). El municipio con la mayor prevalencia molecular fue Rionegro (73.91 %), mientras que la mayor seroprevalencia se registró en el municipio de El Retiro (85.19 %). El BLV ha aumentado su presencia en la región; la detección de este patógeno no solo permitirá determinar la prevalencia, sino también usar los datos obtenidos en programas de prevención y control de la enfermedad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Enzootic bovine leukemia (EBL) is a malignant, systemic disease, high morbidity (70 %) and low mortality, caused by infection with the bovine leukemia virus (BLV). EBL mainly affects dairy cattle; the milk production decreases of 2.5 to 5 % from the herd; also cause immunosuppression allowing other pathogens affecting the production and reproduction of animals. The aim was to determine the presence or absence of BLV through two diagnostic methodologies: a serological technique (ELISA) and a molecular technique (PCR). A total of 1,000 blood samples were taken from Holstein cows distributed in 10 municipalities in Antioquia Department. A PCR was performed to obtain a 444 bp PCR product corresponding to a highly conserved region of the viral env gene, this gene encodes the envelope protein gp51. An indirect ELISA was performed against the gp51 protein for these animals. The PCR detected fewer positive samples (474) that ELISA test (546). The sensitivity of PCR was 74.91 % and the specificity was 85.68 %, compared with the ELISA. The degree of agreement between tests was moderate (kappa=0.59). The municipality with the highest molecular prevalence was Rionegro (73.91 %), while the highest seroprevalence went to the municipality of El Retiro (85.19 %). The BLV has increased its presence in the dairy municipalities in the region; the detection of this pathogen will not only allow to determine the prevalence, it will also allow to use the data obtained in programs of prevention and control of the disease.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Virus leucosis bovina]]></kwd>
<kwd lng="es"><![CDATA[Diagnóstico]]></kwd>
<kwd lng="es"><![CDATA[ELISA]]></kwd>
<kwd lng="es"><![CDATA[PCR]]></kwd>
<kwd lng="en"><![CDATA[Bovine leukemia virus]]></kwd>
<kwd lng="en"><![CDATA[Diagnosis]]></kwd>
<kwd lng="en"><![CDATA[ELISA]]></kwd>
<kwd lng="en"><![CDATA[Nested-PCR]]></kwd>
</kwd-group>
</article-meta>
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