<?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>2007-3380</journal-id>
<journal-title><![CDATA[Revista bio ciencias]]></journal-title>
<abbrev-journal-title><![CDATA[Revista bio ciencias]]></abbrev-journal-title>
<issn>2007-3380</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma de Nayarit]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-33802019000200202</article-id>
<article-id pub-id-type="doi">10.15741/revbio.06.nesp.e456</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Adhesion capacity and invasion index of L. monocytogenes strains isolated from food and clinical cases in Mexico.]]></article-title>
<article-title xml:lang="es"><![CDATA[Capacidad de adherencia e índice de invasión de cepas de L. monocytogenes aisladas de alimentos y casos clínicos en México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castañeda-Ruelas]]></surname>
<given-names><![CDATA[G. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salazar-Jiménez]]></surname>
<given-names><![CDATA[E. P]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Chiñas]]></surname>
<given-names><![CDATA[U.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Eslava-Campos]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chaidez-Quiroz]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Sinaloa Facultad de Ciencias Químico Biológicas ]]></institution>
<addr-line><![CDATA[Culiacán Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Unidad de Investigación Básica y Clínica en Enfermedades Infecciosas Departamento de Salud Pública]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Infantil de México Federico Gómez Unidad de Hemato-Oncología e Investigación ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Centro de Investigación en Alimentación y Desarrollo, A.C. Laboratorio Nacional para la Investigación en Inocuidad Alimentaria ]]></institution>
<addr-line><![CDATA[Culiacán Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>6</volume>
<numero>spe</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-33802019000200202&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-33802019000200202&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-33802019000200202&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract To evaluate the adherence and invasion capacity of different Listeria monocytogenes genotypes recovered from food samples and clinical cases in Mexico, and to know the pathogenic relationship between both groups of strains. Thirty strains of L. monocytogenes isolated from food (n=23) and clinical cases (n=7) previously typed by serology and pulsed-field gel electrophoresis were evaluated. The virulence phenotype was determined by the adhesion and invasion capacity in HEp-2, HT-29 and Caco2 cells. The L. monocytogenes strains analyzed showed diffuse adherence pattern and cell damage, a marked invasion index associated to the strain (p=0.000), serotype (p=0.018) and genotype (p=0.001), but not regarding to origin (p=0.685) were observed. The 23 strains isolated from food were classified with high (4.3 %), moderate (87.0 %) and low (8.7 %) invasion phenotype according to the phenotype presented by clinical and control strains. The characteristics identified in both strain groups infer that L. monocytogenes independent of its origin is a pathogen with different virulence degree, and supports the foods participation in the bacteria transmission and listeriosis cases in Mexico.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Evaluar la capacidad de adherencia e invasión de diferentes genotipos de Listeria monocytogenes recuperadas de alimentos y casos clínicos en México, para definir la relación patogénica entre ambos grupos. Se evaluaron 30 cepas de L. monocytogenes aisladas de alimentos (n=23) y casos clínicos (n=7) previamente tipificadas por serología y electroforesis en gel de campo pulsado. El fenotipo de virulencia se determinó mediante la capacidad de adherencia e invasión en células HEp-2, HT-29 y Caco-2. Las 30 cepas mostraron un patrón de adherencia difuso con daño celular, y presentaron un índice de invasión significativo asociado a la cepa (p=0.000), serotipo (p=0.018) y genotipo (p=0.001), pero no respecto al origen (p=0.658). Las 23 cepas aisladas de alimentos se clasificaron con fenotipo invasivo alto (4.3 %), moderado (87.0 %) y bajo (8.7 %) según el fenotipo presentado por las cepas clínicas y control. Las características observadas en los dos grupos de cepas estudiadas infieren que L. monocytogenes independiente de su procedencia es un microorganismo patógeno con diferente grado de virulencia, y de manera alterna sugiere la participación de los alimentos en la transmisión de la bacteria en los casos de listeriosis en México.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Food]]></kwd>
<kwd lng="en"><![CDATA[Listeria monocytogenes]]></kwd>
<kwd lng="en"><![CDATA[Listeriosis]]></kwd>
<kwd lng="en"><![CDATA[Virulence]]></kwd>
<kwd lng="es"><![CDATA[Alimentos]]></kwd>
<kwd lng="es"><![CDATA[Listeria monocytogenes]]></kwd>
<kwd lng="es"><![CDATA[Listeriosis]]></kwd>
<kwd lng="es"><![CDATA[Virulencia]]></kwd>
</kwd-group>
</article-meta>
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