<?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>0120-0690</journal-id>
<journal-title><![CDATA[Revista Colombiana de Ciencias Pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Colom Cienc Pecua]]></abbrev-journal-title>
<issn>0120-0690</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ciencias Agrarias, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-06902017000100003</article-id>
<article-id pub-id-type="doi">10.17533/udea.rccp.v30n1a01</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Prebiotics, probiotics and thyme (Thymus vulgaris) for broilers: performance, carcass traits and blood variables]]></article-title>
<article-title xml:lang="es"><![CDATA[Prebióticos, probióticos y tomillo (Thymus vulgaris) para pollo de engorde: rendimiento, características de la canal y variables sanguíneas]]></article-title>
<article-title xml:lang="pt"><![CDATA[Prebióticos, probióticos tomilho (Thymus vulgaris) para frangos de corte: desempenho, características da carcaça e variáveis sanguíneas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pournazari]]></surname>
<given-names><![CDATA[Maryam]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[AA-Qotbi]]></surname>
<given-names><![CDATA[Ali]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Seidavi]]></surname>
<given-names><![CDATA[Alireza]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Corazzin]]></surname>
<given-names><![CDATA[Mirco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Rasht Branch, Islamic Azad University Department of Animal Science ]]></institution>
<addr-line><![CDATA[Rasht ]]></addr-line>
<country>Iran</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Università di Udine Department of Agricultural and Environmental Sciences ]]></institution>
<addr-line><![CDATA[Udine ]]></addr-line>
<country>Italy</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2017</year>
</pub-date>
<volume>30</volume>
<numero>1</numero>
<fpage>3</fpage>
<lpage>10</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-06902017000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-06902017000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-06902017000100003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary  Background:  a stressful environment predisposes broilers to various diseases. Probiotics, prebiotics and essential oils can be used as an alternative to antibiotics in poultry production.  Objective:  to evaluate the effects of the Fermacto (prebiotic), Bioplus 2B (probiotic), and thyme essential oil on growth, organ and carcass traits, and hematology of Ross broiler chicks during 42 days.  Methods:  broilers (n=140) were randomly assigned to seven dietary treatment groups with 20 broilers in each group. The experiment was repeated four times; hence, a total of 560 broilers were used in the study. The diets contained 1 or 2 g/kg Fermacto, 1 or 2 g/kg Bioplus 2B, and 0.5 or 1 g/kg thyme essential oil. A negative control was also included.  Results:  when compared with the control group, Fermacto, Bioplus 2B, and thyme essential oil resulted in an increase in body weight gain (BWG) and feed intake (FI), while feed conversion ratio (FCR) was enhanced by 2 g/kg Fermacto. Although thyme essential oil at 1 g/kg also improved FCR, it led to a reduction in the relative weight of thighs and wings. Limited differences were observed in blood parameters.  Conclusion:  Fermacto, Bioplus 2B, and thyme essential oil improved the average daily gain of broilers and had a limited effect on carcass, organs and plasma constituents.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  en la industria del pollo de engorde, el ambiente estresante predispone las aves a diferentes enfermedades causadas por patogenos. Los probióticos, prebióticos y aceites esenciales pueden ser una alternativa a los antibióticos en la producción de pollos de engorde.  Objetivo:  evaluar el efecto del prebiótico Fermacto, del probiótico Bioplus 2B y del aceite esencial de tomillo sobre el crecimiento, las características de la canal y de los órganos, y paramentros hematológicos de pollos de engorde &#8220;Ross&#8221; durante un período de 42 días.  Métodos:  quinientos sesenta pollos de engorde fueron asignados aleatoriamente a siete grupos alimenticios con cuatro repeticiones de 20 pollos cada uno. Las dietas contenían 1 o 2 g/kg de Fermacto, 1 o 2 g/kg de Bioplus 2B, y 0.5 o 1 g/kg de aceite esencial de tomillo. También se incluyó un grupo control (sin aditivos).  Resultados:  en comparación con el control, Fermacto, Bioplus 2B, y el aceite esencial de tomillo aumentaron la ganancia de peso corporal (BWG) y la ingesta de alimento (FI). El índice de conversión del alimento (FCR) se vió mejorado con 2 g/kg de Fermacto. La suplementación con 1 g/kg de aceite esencial de tomillo causó el aumento del FCR, pero al mismo tiempo redujo el peso relativo de los muslos y de las alas. Se observaron pocas diferencias en las variables sanguineas entre los grupos.  Conclusiones:  el prebiótico (Fermacto), el probiótico (Bioplus 2B) y el aceite esencial de tomillo mejoraron la ganancia diaria de peso de los pollos de engorde, pero con un efecto limitado sobre las características de la canal, de los órganos, y de los constituyentes del plasma.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Antecedentes:  na indústria avícola, o stresse ambiental é um fator que predispõe a numerosas doenças. Os probióticos e prebióticos podem ser uma alternativa viável ao uso de antibióticos na produção de frangos.  Objetivo:  avaliar o efeito do prebiótico Fermacto, probiótico Bioplus 2B e óleo essencial de tomilho (OET) no desempenho zootécnico e nos parâmetros hematológicos em frangos Ross, durante um ciclo de produção de 42 dias.  Métodos:  quinhentos e sessenta pintos foram aleatoriamente distribuídos por sete grupos, cada um constituído por quatro replicados com 20 aves. Foram usadas dietas contendo 1 ou 2 g/kg de Fermacto, 1 ou 2 g/kg de Bioplus 2B e 0.5 ou 1 g/kg de OET, e um grupo controlo.  Resultados:  o Fermacto, o Bioplus 2B e o óleo essencial de tomilho aumentaram o ganho de peso e o consumo da ração. O índice de conversão alimentar (IC) foi influenciado pelo adição de 2 g/kg de Fermacto. A suplementação da ração com 1 g/kg de óleo essencial de tomilho aumentou o IC e reduziu o peso relativo das coxas e das asas na carcaça. Não se observaram diferenças significativas entre grupos para os parâmetros da bioquímica sérica.  Conclusães:  as suplementações da dieta com Fermacto, Bioplus 2B e óleo essencial de tomilho melhoram o ganho de peso diário, mas seu efeito sobre as características da carcaça e os parâmetros bioquímicos do plasma sanguíneo foi limitado.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[feed additive]]></kwd>
<kwd lng="en"><![CDATA[feed conversion]]></kwd>
<kwd lng="en"><![CDATA[poulty nutrition]]></kwd>
<kwd lng="en"><![CDATA[weight gain]]></kwd>
<kwd lng="es"><![CDATA[aditivo alimenticio]]></kwd>
<kwd lng="es"><![CDATA[índice de conversión]]></kwd>
<kwd lng="es"><![CDATA[nutrición de pollos]]></kwd>
<kwd lng="es"><![CDATA[ganancia de peso]]></kwd>
<kwd lng="pt"><![CDATA[aditivo alimentar]]></kwd>
<kwd lng="pt"><![CDATA[índice de conversão alimentar]]></kwd>
<kwd lng="pt"><![CDATA[nutrição de aves]]></kwd>
<kwd lng="pt"><![CDATA[ganho médio diário]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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