<?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>S2007-11242020000300795</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v11i3.5516</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Linfonodos y carne molida de res como reservorios de Salmonella spp. de importancia en salud pública]]></article-title>
<article-title xml:lang="en"><![CDATA[Lymph nodes and ground beef as public health importance reservoirs of Salmonella spp.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palós Gutiérrez]]></surname>
<given-names><![CDATA[Tania]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rubio Lozano]]></surname>
<given-names><![CDATA[María Salud]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado Suárez]]></surname>
<given-names><![CDATA[Enrique Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosi Guzmán]]></surname>
<given-names><![CDATA[Naisy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soberanis Ramos]]></surname>
<given-names><![CDATA[Orbelin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Pérez]]></surname>
<given-names><![CDATA[Cindy Fabiola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Méndez Medina]]></surname>
<given-names><![CDATA[Rubén Danilo]]></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 Centro de Enseñanza Práctica, Investigación en Producción y Salud Animal]]></institution>
<addr-line><![CDATA[Ciudad Universitaria Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México FMVZ Departamento de Medicina Preventiva y Salud Pública]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria Departamento de Secuenciación y Bioinformática del Centro Nacional de Referencia de Plaguicidas y Contaminantes ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Autónoma de México FMVZ Departamento de Patología]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>11</volume>
<numero>3</numero>
<fpage>795</fpage>
<lpage>810</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242020000300795&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242020000300795&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242020000300795&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo fue estimar la frecuencia de contaminación, diversidad de serotipos y tipificación por multilocus (MLST) de Salmonella enterica (SE) en linfonodos y carne molida de bovino. Para ello, se analizaron 1,545 muestras provenientes de 400 canales bovinas. El muestreo incluyó linfonodos superficiales (LNS) y profundos, carne molida magra y con grasa, obtenidas en estación cálida (abril-julio) y fría (septiembre-diciembre) durante 2017 y 2018. Los aislamientos puros se sometieron a secuenciación completa del genoma. Con estos datos, se realizó la predicción in silico de serotipos y del perfil de MLST. En total, se obtuvieron 78 aislamientos de SE (5 % del total de muestras analizadas). La frecuencia de contaminación se asoció con el tipo de muestra ( &#967;2=23.7, P&lt;0.0001) y con la época del año ( &#967;2=20.3, P&lt;0.0001), siendo mayor en LNS (9.7 %) y en estación cálida (7.0 %). Los serotipos predominantes fueron Anatum y Reading (n=23 cada uno), Typhimurium (n= 11) y London (n= 9). El perfil de MLST de cepas de los serotipos Typhimurium (ST 19 y 34) y Kentucky (ST 198) se ha reportado previamente en aislamientos involucrados en casos clínicos. Se concluye que los linfonodos y la carne molida de res son reservorios de SE de importancia en salud pública, especialmente durante los meses cálidos del año. Por tanto, es necesario establecer medidas encaminadas a prevenir la diseminación, a lo largo de la cadena productiva, de las cepas asociadas con animales aparentemente sanos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This study aimed to determine the frequency of contamination, serovar diversity, and multilocus sequence typing (MLST) of Salmonella enterica (SE) in lymph nodes and ground beef. A total of 1,545 samples from 400 beef carcasses were analyzed. Samples included peripheral (PLN) and deep lymph nodes (DLN), lean and fatty ground beef obtained in warm (April-July) and cold (September-December) seasons during 2017 and 2018. The pure isolates were subjected to complete genome sequencing. With these data, the in silico prediction of serovars and the MLST profile was performed. In total, 78 SE isolates were obtained (5 % of the total analyzed samples). The frequency of contamination was associated with the type of sample ( &#967;2=23.7, P&lt;0.0001) and the time of year ( &#967;2=20.3, P&lt;0.0001), being higher in PLN (9.7%) and during the warm season (7.0%). The predominant serovars were Anatum and Reading (each one with n= 23), Typhimurium (n= 11), and London (n= 9). The MLST profile of strains of the Typhimurium (ST 19 and 34) and Kentucky (ST 198) serovars has been previously reported in isolates involved in clinical cases. It was concluded that lymph nodes and ground beef are reservoirs of SE of public health importance, especially during the warm months of the year. Therefore, it is necessary to establish measures to prevent dissemination throughout the production chain of strains associated with apparently healthy animals.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Salmonella]]></kwd>
<kwd lng="es"><![CDATA[Bovinos]]></kwd>
<kwd lng="es"><![CDATA[Linfonodos]]></kwd>
<kwd lng="es"><![CDATA[Carne molida]]></kwd>
<kwd lng="es"><![CDATA[Serotipos]]></kwd>
<kwd lng="es"><![CDATA[MLST]]></kwd>
<kwd lng="en"><![CDATA[Salmonella]]></kwd>
<kwd lng="en"><![CDATA[Cattle]]></kwd>
<kwd lng="en"><![CDATA[Lymph nodes]]></kwd>
<kwd lng="en"><![CDATA[Ground beef]]></kwd>
<kwd lng="en"><![CDATA[Serovars]]></kwd>
<kwd lng="en"><![CDATA[MLST]]></kwd>
</kwd-group>
</article-meta>
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