<?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>2448-6760</journal-id>
<journal-title><![CDATA[Veterinaria México OA]]></journal-title>
<abbrev-journal-title><![CDATA[Veterinaria México OA]]></abbrev-journal-title>
<issn>2448-6760</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Medicina Veterinaria y Zootecnia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-67602014000100004</article-id>
<article-id pub-id-type="doi">10.21753/vmoa.1.1.334</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Histological and histochemical features of the small intestine in loggerhead sea turtle hatchlings (Caretta caretta)]]></article-title>
<article-title xml:lang="es"><![CDATA[Características histológicas e histoquímicas del intestino delgado en crías de la tortuga caguama (Caretta caretta)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ontiveros Tlachi]]></surname>
<given-names><![CDATA[Rodrigo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz Tenería]]></surname>
<given-names><![CDATA[Fernando Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Anzaldúa Arce]]></surname>
<given-names><![CDATA[Santiago René]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Facultad de Agronomía y Veterinaria ]]></institution>
<addr-line><![CDATA[San Luis Potosí San Luis Potosí]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Medicina Veterinaria y Zootecnia Departamento de Morfología]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<volume>1</volume>
<numero>1</numero>
<fpage>0</fpage>
<lpage>0</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-67602014000100004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-67602014000100004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-67602014000100004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Loggerheads (Caretta caretta) are endangered marine turtles and basic research is an essential component of conservation. In an attempt to provide further information in this field, we aimed to identify the microscopic morphological and histochemical features of the small intestine in the loggerhead turtle. Four loggerhead turtle hatchlings were used in this study; due to the loggerhead's endangered status, this study was performed with dead animals. During necropsy, the cranial and caudal portions of the small intestine were obtained. The samples were embedded in paraffin and stained using the following techniques: Hematoxylin and Eosin, Gomori's trichrome, Periodic acid-Schiff reactive (PAS), Alcian blue (pH 1.0 and pH 2.5), PAS-Alcian blue, Toluidine blue (pH 4.5 and pH 3.5), Giemsa, colloidal iron, Perl's blue, Wilder's impregnation, Methenamine silver, Grimelius and Masson-Fontana. The intestinal mucosa present plicae featuring a pseudostratified columnar epithelium with abundant blood vessels and abundant lymphatic vessels in the submucosa; both of these observations represent the main histological findings. The secretory granules in the goblet cells demonstrated the following characteristics: in the cranial portion, neutral mucopolysaccharides, sulfated acid mucopolysaccharides and mucopolysaccharides with sialic acid were found. In the caudal portion, neutral mucopolysaccharides and mucopolysaccharides with sialic acid were observed. Argentaffin cells were detected along the small intestine, primarily in the cranial portion. There are morphological differences, both histological and histochemical, between the cranial and caudal portion in the small intestine of C. caretta. These characteristics are correlated with possible functions in tissue physiology.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La tortuga caguama (Caretta caretta) es una especie amenazada, por tanto la [investigación básica] es esencial para complementar los esfuerzos de conservación. Con el objeto de generar información en este campo, este trabajo se orientó a la identificación de la morfología microscópica y los aspectos histoquímicos del intestino delgado en crías de tortuga caguama. Debido a su estatus como especie amenazada, se analizaron 4 especímenes muertos. Durante la necropsia, se obtuvieron muestras del intestino delgado en las porciones craneal y caudal. Las muestras se procesaron por el método de inclusión en parafina y se tiñeron por las siguientes técnicas: hematoxilina y eosina, tricrómica de Gomori, ácido peryódico-reactivo de Schiff (PAS), azul alciano (pH 1.0 y pH 2.5), PAS-azul alciano, azul de toluidina (pH 4.5 y pH 3.5), Giemsa, hierro coloidal, azul de Perls, impregnación de Wilder, metenamina de plata, Grimelius y Masson-Fontana. Entre los hallazgos histológicos, los principales fueron: la mucosa intestinal presentó plicas revestidas por un epitelio cilíndrico pseudoestratificado con vasos sanguíneos y en la submucosa se observaron abundantes vasos linfáticos. Los gránulos de secreción de las células caliciformes presentaron las siguientes características: en la porción craneal se observó la presencia de mucopolisacáridos neutros, ácidos sulfatados y con ácido siálico. En la porción caudal se detectó la presencia de mucopolisacáridos neutros y con ácido siálico. A lo largo del intestino se observaron células argentafines, principalmente en la porción craneal. Existen diferencias morfológicas, tanto histológicas como histoquímicas, entre la porción craneal y caudal en el intestino de C. caretta. Estas características se correlacionaron con posibles funciones dentro de la fisiología tisular.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Loggerhead hatchlings]]></kwd>
<kwd lng="en"><![CDATA[Caretta caretta]]></kwd>
<kwd lng="en"><![CDATA[Histology]]></kwd>
<kwd lng="en"><![CDATA[Histochemistry]]></kwd>
<kwd lng="en"><![CDATA[Small intestine]]></kwd>
<kwd lng="en"><![CDATA[Mucopolysaccharides]]></kwd>
<kwd lng="en"><![CDATA[Argentaffin cells]]></kwd>
<kwd lng="es"><![CDATA[Caretta caretta]]></kwd>
<kwd lng="es"><![CDATA[Histología]]></kwd>
<kwd lng="es"><![CDATA[Histoquímica]]></kwd>
<kwd lng="es"><![CDATA[Intestino delgado]]></kwd>
<kwd lng="es"><![CDATA[Mucopolisacáridos]]></kwd>
<kwd lng="es"><![CDATA[Células argentafines]]></kwd>
</kwd-group>
</article-meta>
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