<?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>S2448-67602016000200002</article-id>
<article-id pub-id-type="doi">10.21753/vmoa.3.2.365</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Ovicidal activity of extracts from four plant species against the cattle nematode Cooperia punctata]]></article-title>
<article-title xml:lang="es"><![CDATA[Actividad ovicida de extractos de cuatro especies de plantas contra el nematodo gastrointestinal Cooperia punctata]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[von Son-de Fernex]]></surname>
<given-names><![CDATA[Elke]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alonso Díaz]]></surname>
<given-names><![CDATA[Miguel Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendoza de Gives]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valles de la Mora]]></surname>
<given-names><![CDATA[Braulio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zamilpa]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Cortazar]]></surname>
<given-names><![CDATA[ManASés]]></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 Centro de Enseñanza Investigación y Extensión en Ganadería Tropical]]></institution>
<addr-line><![CDATA[ Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Secretaría de Agricultura, Ganadería, Desarrollo Rural, Pesca y Alimentación Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Centro Nacional de Investigaciones en Parasitología Veterinaria]]></institution>
<addr-line><![CDATA[Jiutepec Morelos]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Mexicano de Seguro Social Centro de Investigación Biomédica Del Sur ]]></institution>
<addr-line><![CDATA[Xochitepec Morelos]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2016</year>
</pub-date>
<volume>3</volume>
<numero>2</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=S2448-67602016000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-67602016000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-67602016000200002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Bioactive plants might represent an alternative for Cooperia punctata control in grazing cattle. The objectives of this study were (1) to assess the ovicidal activity of extracts from 4 plant species against C. punctata, (2) to determine the role of the polyphenols in the plants&#8217; anthelmintic (AH) activity, and (3) to evaluate the best plant extraction procedure when searching for ovicidal activity. The egg hatch assay was used with different extraction procedures, aqueous (AQ), acetone:water (AW) and acetonic (AC), to evaluate the ovicidal activity of Leucaena leucocephala, Gliricidia sepium, Guazuma ulmifolia and Cratylia argentea. Eggs of C. punctata were exposed in quadruplicate to 0.6, 1.2, 2.4, 4.8 and 9.6 mg mL-1 of each plant extract. The roles of the polyphenols were assessed using polyethylene glycol (PEG). The 12 plant extracts inhibited egg hatching in a dose-dependent manner. Best-fit LC50 values were 1.03 ± 0.17 and 7.90 ± 1.19 mg mL-1 for G. sepium-AC and L. leucocephala-AQ, respectively. Differences in AH activity were found among the extraction procedures (P &lt; 0.05). At the highest concentration, L. leucocephala-AQ inhibited more than 50% of C. punctata hatching. The G. sepium-AC extract fully inhibited egg hatching. The addition of polyethylene glycol revealed the role of the polyphenols in the bioactivity of most plant extracts; however, for G. sepium-AC, the polyphenols were not the main bioactive compounds. Overall, acetone:water extraction represented the best extraction procedure to obtain both ovicidal activity and higher yield. The inhibition rates suggested that L. leucocephala and G. sepium should be evaluated as a means of reducing larval density in pastures.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El uso de plantas bioactivas representa una alternativa para el control de Cooperia punctata en el ganado de pastoreo. Los objetivos de este estudio fueron: (1) evaluar la actividad ovicida de extractos de cuatro especies de plantas contra C. punctata, (2) determinar la participación de los compuestos polifenólicos (CP) en la actividad antihelmíntica (AH) y (3) evaluar el mejor método de extracción para alcanzar una actividad ovicida. El bioensayo de inhibición de la eclosión de huevos (IEH) fue utilizado para evaluar el efecto ovicida de Leucaena leucocephala, Gliricidia sepium, Guazuma ulmifolia y Cratylia argentea; con diferentes métodos de extracción: acuoso (AQ), acetona:agua (AW) y acetónico (AC). Los huevos de C. punctata fueron incubados por cuadruplicado a 0.6, 1.2, 2.4, 4.8 y 9.6 mg mL-1 de cada uno de los extractos de plantas. La participación de los CP fue determinada mediante el uso de polietilenglicol (PEG). Los 12 extractos de plantas inhibieron la eclosión de huevos de modo dosis-dependiente, y las mejores concentraciones letales medias (CL50) fueron: 1.03 ± 0.17 para G. sepium-AC, y 7.90 ± 1.19 mg mL-1 para L. leucocephala-AQ. Se observaron diferencias en la actividad AH según el método de extracción (P &lt; 0.05). A mayor concentración, L. leucocephala-AQ inhibió más del 50 % de la eclosión de C. punctata, entretanto, el extracto G. sepium-AC inhibió la eclosión en su totalidad. La adición de PEG demostró la participación de los CP en la actividad AH de la mayoría de los extractos; no obstante, con G. sepium-AC, los CP no fueron los principales compuestos bioactivos. En general, el mejor método de extracción fue acetona:agua, pues permitió obtener una buena actividad ovicida, con un mayor rendimiento del extracto. Las tasas de inhibición sugieren que L. leucocephala y G. sepium podrían ser evaluadas con la finalidad de reducir la densidad larvaria en pastos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Cattle]]></kwd>
<kwd lng="en"><![CDATA[Nematodes]]></kwd>
<kwd lng="en"><![CDATA[Cooperia punctata]]></kwd>
<kwd lng="en"><![CDATA[Ovicidal effect]]></kwd>
<kwd lng="en"><![CDATA[Plant extracts]]></kwd>
<kwd lng="es"><![CDATA[Bovinos]]></kwd>
<kwd lng="es"><![CDATA[nematodos]]></kwd>
<kwd lng="es"><![CDATA[Cooperia punctata]]></kwd>
<kwd lng="es"><![CDATA[efecto ovicida]]></kwd>
<kwd lng="es"><![CDATA[extractos de plantas]]></kwd>
</kwd-group>
</article-meta>
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