<?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>2007-9028</journal-id>
<journal-title><![CDATA[Ecosistemas y recursos agropecuarios]]></journal-title>
<abbrev-journal-title><![CDATA[Ecosistemas y recur. agropecuarios]]></abbrev-journal-title>
<issn>2007-9028</issn>
<publisher>
<publisher-name><![CDATA[Universidad Juárez Autónoma de Tabasco, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-90282020000200217</article-id>
<article-id pub-id-type="doi">10.19136/era.a7n2.2240</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Detección de Escherichia coli productora de toxina-Shiga en bovinos asintomáticos del sur de Sonora, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Detection of Shiga toxin-Producing Escherichia coli in asymptomatic cattle in the southern Sonora, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivas-Ruiz]]></surname>
<given-names><![CDATA[Cristhoper Michel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cantú-Soto]]></surname>
<given-names><![CDATA[Ernesto Uriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maldonado-Mendoza]]></surname>
<given-names><![CDATA[Ignacio Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Figueroa-López]]></surname>
<given-names><![CDATA[Alejandro Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Anduro-Jordan]]></surname>
<given-names><![CDATA[Julio Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luna-Nevarez]]></surname>
<given-names><![CDATA[Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Castro]]></surname>
<given-names><![CDATA[Pedro Alan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Sonora Departamento de Biotecnología y Ciencia Alimentarias ]]></institution>
<addr-line><![CDATA[Obregón Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico de Sonora Departamento de Ciencias Agronómicas y Veterinarias ]]></institution>
<addr-line><![CDATA[Obregón Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Desarrollo Interdisciplinario de Investigación para el Desarrollo Integral Regional Departamento de Biotecnología Agrícola]]></institution>
<addr-line><![CDATA[ Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>7</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-90282020000200217&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-90282020000200217&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-90282020000200217&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La crianza de ganado bovino es vital para la producción de carne, que en México es una actividad esencial. El bovino es portador asintomático de Escherichia coli productora de toxina Shiga (STEC), y son considerados el principal reservorio y súper propagadores del serotipo O157:H7. Este representa el primer reporte sobre STEC O157:H7 detectada en heces de bovinos asintomáticos, criados para abasto de carne en el noroeste de México. El objetivo fue identificar el serotipo STEC O157:H7 en bovinos asintomáticos criados en el sur de Sonora, México empleando PCR multiplex para con ello avanzar en el entendimiento de su capacidad propagadora. La incidencia de la STEC O157:H7 fue del 3.1% y de STEC no O157 de 19.8%. Estos resultados sugieren que el ganado bovino es un reservorio primario de STEC en esta región del país; sin embargo, es necesario profundizar para establecer si el patógeno contamina otras matrices como agua o alimentos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The breeding and fattening of cattle are necessary for the production of meat; in Mexico it is an essential activity. Cattle is an asymptomatic carrier of Shiga toxinproducing Escherichia coli (STEC), and they are considered the main reservoir and super-shedder of serotype O157: H7. The aim of this work was to identify the STEC O157: H7 serotype in asymptomatic cattle raised in southern Sonora, Mexico, using multiplex PCR in order to understand of its propagation capacity. The incidence of serotype O157:H7 was 3.1% and STEC non-O157 was 19.8%. These results suggest cattle as a primary reservoir of STEC in this region of the country; nonetheless, studies are still needed to establish whether excreted strains contaminate the food, environment and/or water streams.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bovinos asintomáticos]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="es"><![CDATA[O157:H7]]></kwd>
<kwd lng="es"><![CDATA[STEC]]></kwd>
<kwd lng="es"><![CDATA[súper propagadores]]></kwd>
<kwd lng="en"><![CDATA[Asymptomatic bovines]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="en"><![CDATA[O157:H7]]></kwd>
<kwd lng="en"><![CDATA[STEC]]></kwd>
<kwd lng="en"><![CDATA[super-shedder]]></kwd>
</kwd-group>
</article-meta>
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