<?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>2007-7858</journal-id>
<journal-title><![CDATA[CienciaUAT]]></journal-title>
<abbrev-journal-title><![CDATA[CienciaUAT]]></abbrev-journal-title>
<issn>2007-7858</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma de Tamaulipas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-78582015000100068</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Desarrollo de una técnica para la detección in vitro de la presencia de antibióticos en muestras de hígado de res, cerdo y pollo]]></article-title>
<article-title xml:lang="en"><![CDATA[Development of an in vitro antibiotics detection technique in samples of beef liver, pork and chicken]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Monroy-Torres]]></surname>
<given-names><![CDATA[Rebeca]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Linares-Segovia]]></surname>
<given-names><![CDATA[Benigno]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Gómez]]></surname>
<given-names><![CDATA[Xóchitl Sofía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Guanajuato División de Ciencias de la Salud Departamento de Medicina y Nutrición]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Observatorio Universitario de Seguridad Alimentaria y Nutricional del Estado de Guanajuato  ]]></institution>
<addr-line><![CDATA[Cortazar Guanajuato]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2015</year>
</pub-date>
<volume>9</volume>
<numero>2</numero>
<fpage>68</fpage>
<lpage>73</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-78582015000100068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-78582015000100068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-78582015000100068&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El descubrimiento de los antibióticos ha permitido salvar la vida de millones de personas, sin embargo, su efectividad ha ido disminuyendo a la par que los microorganismos van desarrollando resistencia debido a su exposición constante durante su aplicación en el crecimiento de animales de abasto, por lo que se hace necesario contar con técnicas de detección oportuna de su presencia en alimentos. Se realizó un estudio preliminar, de corte transversal, en muestras de hígado de res, cerdo y pollo para establecer la viabilidad de determinar la presencia de antibióticos mediante la inhibición del crecimiento de una cepa de Escherichia coli ATCC25922, utilizando el método de Kirby-Bauer. Se inocularon 15 cajas Petri conteniendo agar Mueller Hinton (cinco para cada muestra de hígado: res, cerdo y pollo), con la cepa E. Coli sensible a antibióticos. En cada caja de agar se colocaron porciones de hígado de 5 mm a 10 mm de diámetro, con una distancia de 1 cm a 5 cm entre muestras. Las cajas se incubaron a 35 OC por 24 h y se evaluó la formación de halos de inhibición. Se encontró que sólo una de las 15 muestras de hígado analizadas, correspondiente a hígado de res, presentó un halo de inhibición mayor a 30 mm. Los resultados obtenidos indican la viabilidad de usar esta técnica para la detección de la presencia de antibióticos en productos cárnicos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The discovery of antibiotics has enabled scientist to save millions of lives. However, their effectiveness has been declining at the same time that microorganisms are developing resistance due to the continuous application of antibiotics during the rearing of farmed animals' production. It is therefore necessary to develop techniques for the early detection of antibiotics presence in food. A cross-sectional and preliminary study was conducted to establish the feasibility to determine the presence of antibiotics in samples of beef, pork and chicken livers by inhibiting the Escherichia coli ATCC25922 strain growth employing the Kirby-Bauer method. Fifteen Petri plates (five foreach liver sample: beef, pork and poultry) containing the Mueller Hinton agar were inoculated with an antibiotic sensitive E. coli ATCC25922 strain. In each agar plate a portion of liver of 5 mm of diameter was placed 1 cm away from each inoculum. The plates were incubated at 35 OC for 24h and the presence of inhibition halos were evaluated. It was found that only one of the fiftheen liver samples analyzed, corresponding to a beef liver, showed an inhibition halo higher than 30 mm. The obtained results indicate that the use of this technique adequate to detect the presence of antibiotics in meat products.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Antibióticos]]></kwd>
<kwd lng="es"><![CDATA[Escherichia coli]]></kwd>
<kwd lng="es"><![CDATA[hígado]]></kwd>
<kwd lng="es"><![CDATA[efecto inhibitorio]]></kwd>
<kwd lng="en"><![CDATA[Antibiotics]]></kwd>
<kwd lng="en"><![CDATA[Escherichia coli]]></kwd>
<kwd lng="en"><![CDATA[liver]]></kwd>
<kwd lng="en"><![CDATA[inhibitory effect]]></kwd>
</kwd-group>
</article-meta>
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