<?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>S2007-11242018000100135</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v9i1.4324</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Endometritis subclínica y tasa de gestación en vacas lecheras en México]]></article-title>
<article-title xml:lang="en"><![CDATA[Subclinical endometritis and pregnancy rate in dairy cows in Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barajas Merchan]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Cerón]]></surname>
<given-names><![CDATA[Joel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Alfonso]]></surname>
<given-names><![CDATA[Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Bárcenas]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Juárez López]]></surname>
<given-names><![CDATA[Noé Orlando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bedolla Alva]]></surname>
<given-names><![CDATA[Mario Adán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luzbel de la Sota]]></surname>
<given-names><![CDATA[Rodolfo]]></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 Departamento de Reproducción]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Medicina Veterinaria y Zootecnia Departamento de Patología]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de la Plata Facultad de Ciencias Veterinarias ]]></institution>
<addr-line><![CDATA[La Plata ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>1</numero>
<fpage>135</fpage>
<lpage>146</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242018000100135&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242018000100135&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242018000100135&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En el presente estudio se determinó la prevalencia de endometritis subclínica y su efecto en la tasa de gestación en vacas lecheras en manejo intensivo. Entre los días 35 y 45 posparto se seleccionaron 237 vacas sin patologías uterinas (vacas con útero involucionado y sin secreciones vaginales anormales); a todas ellas se les tomó una muestra citológica de endometrio mediante la técnica de Cytobrush. Los frotis se procesaron con la tinción de Diff-Quick. Se contaron un total de 200 células y se determinó la proporción de células polimorfo nucleares (PMN). Las vacas con &#8805; 6 % de PMN se consideraron con endometritis subclínica. Cuarenta y tres por ciento (103/237) de las vacas presentó endometritis subclínica. Las vacas con puerperio patológico tuvieron mayor probabilidad de padecer endometritis subclínica que las vacas con puerperio normal (60 vs 36 %, respectivamente; razón de probabilidad= 2.69). Las vacas normales tuvieron mayor tasa de gestación en el primer servicio que la vacas con endometritis subclínica (31.4 vs 20.0 %; respectivamente; razón de probabilidad= 2.02) y la proporción de vacas gestantes en el día 120 posparto fue mayor en las vacas normales que en las vacas con endometritis subclínica (51.6 vs 37.9 %, respectivamente; razón de probabilidad= 1.98). Se concluye que la prevalencia de endometritis subclínica en vacas lecheras entre los días 35 y 45 posparto es de 43 %, lo cual disminuyó en un 11.4 % la tasa de gestación en el primer servicio y en un 13.7 % la tasa de gestación acumulada en el día 120 posparto.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The present study determined the prevalence of subclinical endometritis and its effect on pregnancy rate in intensively managed dairy cows. Between d 35 and 45 postpartum, 237 cows with no uterine pathologies judged to have completed uterine involution and no abnormal vaginal secretions were selected. Endometrial cytology samples were taken from each cow using the Cytobrush technique, and smears were stained with Diff-Quick. A total of 200 sample cells were counted and the proportion of polymorphonuclear leukocytes (PMN) was estimated. Cows with &#8805;6 % PMN were considered to have subclinical endometritis; 43 % (103/237) of cows sampled met this criterion. Cows with pathological puerperium had a higher probability of undergoing subclinical endometritis than cows with normal puerperium (60 vs 36 %, respectively; odds ratio= 2.69). Cows not presenting subclinical endometritis had a higher pregnancy rate at first service than cows with this condition (31.4 vs 20.0 %, respectively; odds ratio= 2.02), and the percentage of pregnant cows at d 120 postpartum was higher in cows not experiencing subclinical endometritis than in cows with this condition (51.6 vs 37.9 %, respectively; odds ratio= 1.98). It concludes that 43 % of cows suffered subclinical endometritis between d 35 and 45 postpartum, which decreased pregnancy rate at first service, as well as cumulative pregnancy rate at d 120 postpartum.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Endometritis subclínica]]></kwd>
<kwd lng="es"><![CDATA[Ganado lechero]]></kwd>
<kwd lng="es"><![CDATA[Fertilidad]]></kwd>
<kwd lng="en"><![CDATA[Subclinical endometritis]]></kwd>
<kwd lng="en"><![CDATA[Dairy cows]]></kwd>
<kwd lng="en"><![CDATA[Pregnancy rate]]></kwd>
</kwd-group>
</article-meta>
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