<?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>S2007-11242023000400923</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v14i4.6419</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Ovine pulmonary adenocarcinoma in Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Adenocarcinoma pulmonar ovino en México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruíz-Ramírez]]></surname>
<given-names><![CDATA[Johnatan Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chávez-Ramírez]]></surname>
<given-names><![CDATA[Brayan Jossue]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Valle]]></surname>
<given-names><![CDATA[Jorge Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Heras]]></surname>
<given-names><![CDATA[Marcelo de las]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Mayagoitia]]></surname>
<given-names><![CDATA[Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Márquez]]></surname>
<given-names><![CDATA[Luis Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Colima Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[ Colima]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Colima Facultad de Medicina ]]></institution>
<addr-line><![CDATA[ Colima]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Zaragoza Facultad de Veterinaria ]]></institution>
<addr-line><![CDATA[Zaragoza ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,University of Prince Edward Island Department of Pathology and Microbiology ]]></institution>
<addr-line><![CDATA[Charlottetown PEI]]></addr-line>
<country>Canada</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>14</volume>
<numero>4</numero>
<fpage>923</fpage>
<lpage>930</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242023000400923&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242023000400923&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242023000400923&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Ovine pulmonary adenocarcinoma is a transmissible pulmonary malignancy of sheep caused by a beta-retrovirus currently named Jaagsiekte sheep retrovirus (JSRV). Club cells (formerly Clara cells) in the bronchiole and type II pneumonocytes in the alveoli are the target oncogenic cells for this virus. Characterized clinically by intermittent cough, abundant nasal discharge, and progressive weight loss, the tumors randomly involve all lung lobes or have a cranioventral distribution mimicking bronchopneumonia. The definitive diagnosis of ovine pulmonary adenocarcinoma requires identifying Jaagsiekte sheep retrovirus or associated specific proteins in neoplastic cells such as JSRV-Env oncogenic protein. A two-year-old Male Pelibuey sheep with a history of chronic cough and progressive weight loss was treated unsuccessfully with antibiotics and died a few days later. Postmortem examination revealed lung edema and several nodular to locally extensive masses in the lungs. Microscopically the tumoral tissues were composed of clusters of neoplastic epithelial cells exhibiting a lepidic growth pattern typical of pulmonary carcinoma. Tumoral cells were immunopositive for Jaagsiekte sheep retrovirus-Env oncogenic protein. Based on these findings, the final diagnosis of ovine pulmonary adenocarcinoma was made.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El adenocarcinoma pulmonar ovino es una neoplasia pulmonar transmisible del ganado ovino causada por un beta retrovirus actualmente denominado retrovirus Jaagsiekte de las ovejas (JSRV). Las células Club (anteriormente llamadas células de Clara) de los bronquiolos y los neumocitos de tipo II de los alvéolos son las células oncogénicas que constituyen el objetivo de este virus. Se caracteriza clínicamente por tos intermitente, secreción nasal abundante y pérdida de peso progresiva, los tumores afectan aleatoriamente a todos los lóbulos pulmonares o tienen una distribución cráneo-ventral que simula una bronconeumonía. El diagnóstico definitivo del adenocarcinoma pulmonar ovino requiere que se identifique el retrovirus Jaagsiekte de las ovejas RVJO-Env, o bien, la presencia de proteínas específicas asociadas en las células neoplásicas, tales como la proteína oncogénica JSRV-Env. Un ovino Pelibuey macho de dos años con un historial de tos crónica y pérdida de peso progresiva fue tratado sin éxito con antibióticos y murió unos días más tarde. El examen post mortem reveló edema pulmonar y varias masas nodulares localmente extensas en los pulmones. A nivel microscópico, los tejidos tumorales estaban compuestos por grupos de células epiteliales neoplásicas que mostraban un patrón de crecimiento lepídico típico del carcinoma pulmonar. Las células tumorales fueron inmunopositivas para la proteína oncogénica Env del retrovirus Jaagsiekte de la oveja. Con base en estos hallazgos, se hizo el diagnóstico final de adenocarcinoma pulmonar ovino.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Ovine pulmonary adenocarcinoma]]></kwd>
<kwd lng="en"><![CDATA[Ovine pulmonary adenomatosis]]></kwd>
<kwd lng="en"><![CDATA[Jaagsiekte]]></kwd>
<kwd lng="en"><![CDATA[retrovirus]]></kwd>
<kwd lng="en"><![CDATA[JSRV]]></kwd>
<kwd lng="en"><![CDATA[Immunohistochemistry]]></kwd>
<kwd lng="en"><![CDATA[Pelibuey]]></kwd>
<kwd lng="es"><![CDATA[Adenocarcinoma pulmonar ovino]]></kwd>
<kwd lng="es"><![CDATA[Adenomatosis pulmonar ovina]]></kwd>
<kwd lng="es"><![CDATA[Retrovirus Jaagsiekte]]></kwd>
<kwd lng="es"><![CDATA[RVJO]]></kwd>
<kwd lng="es"><![CDATA[Inmunohistoquímica]]></kwd>
<kwd lng="es"><![CDATA[Pelibuey]]></kwd>
</kwd-group>
</article-meta>
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