<?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>1688-4809</journal-id>
<journal-title><![CDATA[Veterinaria (Montevideo)]]></journal-title>
<abbrev-journal-title><![CDATA[Veterinaria (Montev.)]]></abbrev-journal-title>
<issn>1688-4809</issn>
<publisher>
<publisher-name><![CDATA[Sociedad de Medicina Veterinaria del Uruguay]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1688-48092024000101202</article-id>
<article-id pub-id-type="doi">10.29155/vet.60.221.3</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Detection of Escherichia coli CS31A-antibodies in colostrum from unvaccinated and vaccinated dairy cows against calf diarrhea in Uruguay]]></article-title>
<article-title xml:lang="es"><![CDATA[Detección de anticuerpos anti-Escherichia coli CS31A+ en calostro de vacas sin vacunar y vacunadas contra la diarrea neonatal en Uruguay]]></article-title>
<article-title xml:lang="pt"><![CDATA[Detecção de anticorpos anti-CS31A para Escherichia coli no colostro de vacas não vacinadas e vacinadas contra diarreia neonatal em 3 fazendas leiteiras no Uruguai]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rezzano]]></surname>
<given-names><![CDATA[Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Revello]]></surname>
<given-names><![CDATA[Álvaro González]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[Sofía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Escalera]]></surname>
<given-names><![CDATA[Gabriela Martínez de la]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oliver]]></surname>
<given-names><![CDATA[Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acquistapace]]></surname>
<given-names><![CDATA[Sofía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zunino]]></surname>
<given-names><![CDATA[Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Umpiérrez]]></surname>
<given-names><![CDATA[Ana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Investigaciones Biológicas Clemente Estable Departamento de Microbiología ]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de la República Facultad de Veterinaria Departamento de Ciencia y Tecnología de Alimentos]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Estación Experimental INIA La Estanzuela Instituto Nacional de Investigación Agropecuaria (INIA) Plataforma de Investigación en Salud Animal]]></institution>
<addr-line><![CDATA[Colonia ]]></addr-line>
<country>Uruguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>60</volume>
<numero>221</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S1688-48092024000101202&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S1688-48092024000101202&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S1688-48092024000101202&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Neonatal calf diarrhea (NCD) is a severe infectious disease, distributed worldwide. In Uruguay, the calf mortality rate in dairy farms associated with infectious diseases is high. Colostrum intake constitutes the primary source of antibodies of neonates and correlates with good tracers of health and survival during the suckling stage. Vaccination against NCD improves the colostrum&#8217;s immunoglobulin composition in pregnant cows. Its correct consumption ensures the transmission of antibodies to the calf and should prevent or reduce the occurrence and outcome of diseases. Several vaccines against NCD are on the market, containing E. coli bacterin, purified E. coli fimbriae together with toxoids, and viral antigens. E. coli CS31A+ bacterin have been included in some vaccines against NCD. The prevalence of clpG is one of the highest among E. coli virulence genes in calves feces in Uruguay. ClpG is the structural protein of CS31A adhesin. This work aimed to determine the level of anti-ClpG antibodies in the colostrum of Holstein-Friesian cows without vaccination and vaccinated against NCD in Uruguay. The colostrum composition was analyzed to determine the functional state of the mammary gland. Non-significant differences were determined in the colostrum-protein or -lactose composition. The differences in terms of fat were assumed on the average for colostrum. A recombinant ClpG protein was purified using a prokaryotic expression system from E. coli. ELISA analyses showed anti-ClpG antibodies in both groups of bovines, reflecting the natural exposure of cows to E. coli CS31A+ strains. Mixed model analysis showed no variance homogeneity between groups but significant differences in medians of the IgG values between groups of cows. A tendency to increase the amount of IgG against ClpG in the colostrum of vaccinated cows was observed, which can result in a better outcome for the calves if the passive transfer of IgG effectively occurs.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La diarrea neonatal de terneros (DNT) es una enfermedad infecciosa grave a nivel mundial. En Uruguay, la tasa de mortalidad de terneros asociada a enfermedades infecciosas es alta. El calostro constituye la principal fuente de anticuerpos y se correlaciona con buenas trazas de salud y supervivencia durante la lactancia. La vacunación contra la DNT mejora la composición de inmunoglobulinas del calostro en vacas preñadas y su correcto consumo asegura la transmisión de anticuerpos al neonato. Las vacunas contra la DNT frecuentemente contienen bacterina o fimbrias purificadas de E. coli, como bacterina de E. coli CS31A+, así como antígenos virales. La prevalencia de clpG es una de las más altas entre los genes de virulencia de E. coli en heces de terneros en Uruguay. ClpG es la proteína estructural de la adhesina CS31A. El objetivo del trabajo fue determinar el nivel de anticuerpos anti-ClpG en calostro de vacas holstein-friesian sin vacunar y vacunadas contra la DNT en Uruguay. Se analizó el estado funcional de la glándula mamaria. No se encontraron diferencias significativas en la composición de proteína o lactosa. Las diferencias en términos de la grasa se asumieron dentro del promedio para el calostro. Para los análisis de anticuerpos se purificó una proteína ClpG recombinante usando un sistema de expresión en E. coli. Los análisis de ELISA mostraron anticuerpos anti-ClpG en ambos grupos, lo que refleja la exposición natural de las vacas a cepas E. coli CS31A+. Con el modelo mixto utilizado no se detectó homogeneidad de varianza, pero sí diferencias significativas en las medianas de los valores de IgG entre vacas vacunadas y no vacunadas. En vacas vacunadas se observó una tendencia de aumento de IgG anti-ClpG en el calostro, lo que podría resultar en un mejor resultado para los terneros si la transferencia pasiva ocurre efectivamente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo: A diarréia neonatal em bezerros (DNB) é uma doença infecciosa grave em todo o mundo. No Uruguai, a taxa de mortalidade de bezerros associada a doenças infecciosas é alta. O colostro representa a principal fonte de anticorpos e está correlacionado com bons indicadores de saúde e sobrevivência durante a lactação. A vacinação contra a DNB melhora a composição de imunoglobulinas do colostro em vacas prenhes e o seu correto consumo garante a transmissão de anticorpos ao neonato. As vacinas contra DNB geralmente contêm bacterina ou fímbrias purificadas de E. coli, como a bacterina de E. coli CS31A+, bem como antígenos virais. A prevalência de clpG é uma das mais altas entre os genes de virulência de E. coli em fezes de bezerros no Uruguai. ClpG é a proteína estrutural da adesina CS31A. O objetivo do trabalho foi determinar o nível de anticorpos anti-ClpG no colostro de vacas Holandesas não vacinadas e vacinadas contra DNB no Uruguai. O estado funcional da glândula mamária foi analisado. Não foram encontradas diferenças significativas na composição de proteína ou lactose. As diferenças em termos de gordura foram consideradas dentro da média do colostro. Para as análises de anticorpos, uma proteína ClpG recombinante foi purificada usando um sistema de expressão de E. coli. As análises de ELISA mostraram anticorpos anti-ClpG em ambos os grupos, refletindo a exposição natural das vacas às cepas de E. coli CS31A+. Com o modelo misto utilizado, não foi detectada homogeneidade de variância, mas foram encontradas diferenças significativas nas medianas dos valores de IgG entre vacas vacinadas e não vacinadas. Em vacas vacinadas, foi observada uma tendência de aumento de IgG anti-ClpG no colostro, o que poderia resultar em um melhor resultado para os bezerros se a transferência passiva ocorresse de forma efetiva.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Escherichia coli CS31A+]]></kwd>
<kwd lng="en"><![CDATA[Colostrum]]></kwd>
<kwd lng="en"><![CDATA[anti-ClpG IgG]]></kwd>
<kwd lng="en"><![CDATA[Passive IgG transference in calves]]></kwd>
<kwd lng="es"><![CDATA[Escherichia coli CS31A+]]></kwd>
<kwd lng="es"><![CDATA[Calostro]]></kwd>
<kwd lng="es"><![CDATA[IgG anti-ClpG]]></kwd>
<kwd lng="es"><![CDATA[Transferencia pasiva de anticuerpos]]></kwd>
<kwd lng="pt"><![CDATA[Escherichia coli CS31A+]]></kwd>
<kwd lng="pt"><![CDATA[Colostro]]></kwd>
<kwd lng="pt"><![CDATA[IgG anti-ClpG]]></kwd>
<kwd lng="pt"><![CDATA[Transferência passiva de anticorpos]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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