<?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>S2448-67602014000100002</article-id>
<article-id pub-id-type="doi">10.21753/vmoa.1.1.332</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Prevalence and risk factors associated with infection by Cryptosporidium spp. in suckling calves in Aguascalientes, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Prevalencia y factores de riesgo asociados a la infección por Cryptosporidium spp. en becerras lactantes en Aguascalientes, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Romo]]></surname>
<given-names><![CDATA[Dolores]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz Vázquez]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quezada Tristán]]></surname>
<given-names><![CDATA[Teódulo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva Peña]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdivia Flores]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vázquez Flores]]></surname>
<given-names><![CDATA[Sonia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramos Parra]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Bachillerato Tecnológico Agropecuario No. 205  ]]></institution>
<addr-line><![CDATA[ Aguascalientes]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico El Llano Aguascalientes División de Estudios de Posgrado e Investigación ]]></institution>
<addr-line><![CDATA[ Aguascalientes]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Aguascalientes Centro de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[ Aguascalientes]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Colima Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Tecomán Colima]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Tecnológico de Estudios Superiores de Monterrey  ]]></institution>
<addr-line><![CDATA[ Querétaro]]></addr-line>
<country>México</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=S2448-67602014000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-67602014000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-67602014000100002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The aim of this study was to identify the prevalence of and certain risk factors associated with infection by Cryptosporidium spp. in suckling calves that were maintained in confinement in three dairy farms in Aguascalientes, Mexico. Over a period of 12 months, 1658 fecal samples were taken from 0- to 28 day-old calves. These samples were processed by a Kinyoun stain of the fecal smears to identify the presence of parasite oocysts. A survey was conducted to identify the different management factors present in the dairy farms, and a risk analysis was performed using logistic regression. The overall prevalence of Cryptosporidium spp. infection was 40%; the 8- to 14-day-old age group of calves had the highest prevalence of infection (81%), while the lowest prevalence of infection (21%) was observed in the 22- to 28-day-old age group. The identified risk factors for infection by Cryptosporidium spp. in­cluded the 8- to 14-day-old group (OR = 15.2; 95% CI 11.2 - 20.6; P &lt; 0.000) and the 15- to 21-day-old group (OR = 2.5; 95% CI 1.9 - 3.2, P &lt; 0.000); the use of sawdust bedding (OR= 1.8; 95% Cl 1.1 - 2.8, P &lt; 0.011); the plastic container from which calves drink milk (OR =1.4; 95% Cl 1.1-1.7, P &lt; 0.000); the low level of immunoglobulins (OR = 1.8; 95% Cl 1.1 - 2.9, P &lt; 0.009); and calving care by non-specialized personnel (night watchman: OR = 2.5; 95% Cl 1.6 - 3.9, P &lt; 0.000; nursing area worker: OR 1.7; 95% Cl 1.2 - 2.5, P &lt; 0.001).]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo fue identificar la prevalencia y algunos factores de riesgo asociados a la infección por Cryptosporidium spp. en becerras lactantes mantenidas en confinamiento en tres establos lecheros de Aguascalientes, México. Durante 12 meses se recolectaron 1658 muestras fecales de becerras de 0 a 28 días de edad, que se procesaron mediante frotis fecal teñido con Kinyoun para identificar la presencia de ooquistes del parásito. Se aplicó una encuesta para identificar diferentes características de manejo en los establos y se desarrolló el análisis de riesgos mediante regresión logística. La prevalencia general a la infección por Cryptosporidium spp. fue de 40%. El grupo de becerras de 8 a 14 días de edad presentó la prevalencia a la infección más elevada (81%), mientras que la más baja (21%) se observó en el grupo de 22 a 28 días de edad. Se identificaron como factores de riesgo a la infección por Cryptosporidium spp., al grupo de 8 a 14 días de edad (OR = 2.5; 95% Cl 1.9 - 3.2, p &lt; 0.000); el uso de cama de aserrín (OR = 1.8; 95% Cl 1.1 - 2.8, p &lt; 0.011); el recipiente de plástico de donde beben leche las becerras (OR = 1.4; 95% Cl 1.1 - 1.7, p &lt; 0.000); el bajo nivel de inmunoglobulinas (OR = 1.8; 95% Cl 1.1 - 2.9, p &lt; 0.009), y la atención de partos por parte de personal no especializado (velador: OR = 2.5; 95% Cl 1.6 - 3.9, p &lt; 0.000; trabajador del área de recría: OR = 1.7; 95% Cl 1.2 - 2.5, p &lt; 0.001).]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Cryptosporidium spp.]]></kwd>
<kwd lng="en"><![CDATA[Dairy cattle]]></kwd>
<kwd lng="en"><![CDATA[Suckling calves]]></kwd>
<kwd lng="en"><![CDATA[Prevalence]]></kwd>
<kwd lng="en"><![CDATA[Risk factors]]></kwd>
<kwd lng="es"><![CDATA[Cryptosporidium spp]]></kwd>
<kwd lng="es"><![CDATA[Ganado lechero]]></kwd>
<kwd lng="es"><![CDATA[Becerras lactantes]]></kwd>
<kwd lng="es"><![CDATA[Prevalencia]]></kwd>
<kwd lng="es"><![CDATA[Factores de riesgo]]></kwd>
</kwd-group>
</article-meta>
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