<?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>0120-2952</journal-id>
<journal-title><![CDATA[Revista de la Facultad de Medicina Veterinaria y de Zootecnia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Med. Vet. Zoot.]]></abbrev-journal-title>
<issn>0120-2952</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Medicina Veterinaria y de Zootecnia Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-29522021000200105</article-id>
<article-id pub-id-type="doi">10.15446/rfmvz.v68n2.98031</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Seropositivity for Bovine Viral Diarrhea and Enzootic Bovine Leukemia viruses in Blanco Orejinegro cattle in Colombia and infection associated-factors]]></article-title>
<article-title xml:lang="es"><![CDATA[Soropositividade para o vírus da diarréia virai bovina e leucemia bovina enzoótica em bovinos Blanco Orejinegro na Colômbia e fatores associados à infecção]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Saldarriaga-Saldarriaga]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Londoño-Gil]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Herrera]]></surname>
<given-names><![CDATA[L. G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rincón-Flórez]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Herrera]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Medellín Antioquia]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Medellín Antioquia]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Medellín Antioquia]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Palmira Valle del Cauca]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Medellín Antioquia]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<volume>68</volume>
<numero>2</numero>
<fpage>105</fpage>
<lpage>123</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-29522021000200105&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-29522021000200105&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-29522021000200105&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Serological controls for diseases of viral origin in animal production systems and the identification of factors associated with infections are decisive elements to establish prevention and control measures. The aim of this study was to establish the serological status for Bovine Viral Diarrhea (BVD) and Enzootic Bovine Leukemia (EBL) viruses in Blanco Orejinegro (BON) cattle from Colombia, and to identify the factors associated with seropositivity. A cross-sectional study was conducted with a total of 498 animals of all age groups and physiological states of the BON breed were selected, belonging to 14 herds located in 6 states of Colombia, in which a survey with 27 questions was conducted. By means of the chi-square test, possible factors associated with seropositivity against the 2 viruses were identified. A sample of 4 ml of blood was taken from each animal to extract plasma and make indirect Elisa tests to detect antibodies against both pathogens. General seropositivity of 27,1% was obtained for EBL, finding as factors associated with seropositivity the inadequate disposition of placental tissues after delivery of the cows and the non-performance of serological tests on new animals entering the herd. For BVD, seropositivity obtained was 50,6%, and the factors associated with seropositivity identified were having had a history of the disease in the herd, and using semen from bulls that are not known to be free for the infection. We suggest establishing control measures considering the factors associated with each viral infection to limit their expansion in the BON cattle production systems of Colombia.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO Os controles sorológicos para doenças de origem viral nos sistemas de produção animal e a identificação de fatores associados à infecção são elementos decisivos para estabelecer medidas de prevenção e controle. O objetivo deste estudo foi estabelecer o status sorológico dos vírus da Diarréia Viral Bovina (BVD) e da Leucemia Bovina Enzoótica (EBL) em bovinos Blanco Orejinegro (BON) da Colômbia e identificar os fatores associados à soropositividade. Foram selecionados 498 animais de todas as faixas etárias e estados fisiológicos da raça BON, de 14 rebanhos localizados em seis regiões da Colômbia, nos quais foi realizada uma pesquisa para identificar possíveis fatores associados à soropositividade contra os dois vírus. Foi retirada uma amostra de 4 ml de sangue de cada animal para extrair plasma e fazer testes ELISA indiretos para detectar anticorpos contra os dois patógenos. Obteve-se soropositividade geral de 27,1% para EBL, encontrando como fatores associados à soropositividade a disposição inadequada dos tecidos placentários após o parto das vacas e a não realização de testes sorológicos em novos animais que entraram no rebanho. Para a BVD, a soropositividade obtida foi de 50,6%, e os fatores associados à soropositividade identificados foram: histórico de doença no rebanho e uso de sêmen de touros que não são reconhecidos como livres da infecção. Sugerimos o estabelecimento de medidas de controle considerando os fatores associados a cada infecção viral para limitar sua expansão nos sistemas de produção de gado BON da Colômbia.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[creole cattle]]></kwd>
<kwd lng="en"><![CDATA[Elisa]]></kwd>
<kwd lng="en"><![CDATA[serological status]]></kwd>
<kwd lng="en"><![CDATA[viral diseases]]></kwd>
<kwd lng="pt"><![CDATA[gado crioulo]]></kwd>
<kwd lng="pt"><![CDATA[ELISA]]></kwd>
<kwd lng="pt"><![CDATA[status sorológico]]></kwd>
<kwd lng="pt"><![CDATA[doenças virais]]></kwd>
</kwd-group>
</article-meta>
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