<?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>2079-3480</journal-id>
<journal-title><![CDATA[Cuban Journal of Agricultural Science]]></journal-title>
<abbrev-journal-title><![CDATA[Cuban J. Agric. Sci.]]></abbrev-journal-title>
<issn>2079-3480</issn>
<publisher>
<publisher-name><![CDATA[Editorial del Instituto de Ciencia Animal]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2079-34802020000100067</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Effect of a probiotic mixture of Bacillus subtilis 20Bp and Lactobacillus brevis 40Lp on productive and health indicators of broilers]]></article-title>
<article-title xml:lang="es"><![CDATA[Efecto de una mezcla probiótica de Bacillus subtilis 20Bp y Lactobacillus brevis 40Lp en indicadores productivos y de salud de pollos de ceba]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arteaga]]></surname>
<given-names><![CDATA[Fátima G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rondón]]></surname>
<given-names><![CDATA[Ana J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Milián]]></surname>
<given-names><![CDATA[Grethel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Laurencio]]></surname>
<given-names><![CDATA[Marta]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Narváez]]></surname>
<given-names><![CDATA[Gabriela N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velez]]></surname>
<given-names><![CDATA[L.A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pinto]]></surname>
<given-names><![CDATA[Georgette]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Escuela Superior Politécnica Agropecuaria de Manabí  ]]></institution>
<addr-line><![CDATA[Calceta Manabí]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Estudios Biotecnológicos de la Universidad de Matanzas  ]]></institution>
<addr-line><![CDATA[ Matanzas]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<volume>54</volume>
<numero>1</numero>
<fpage>67</fpage>
<lpage>76</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2079-34802020000100067&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2079-34802020000100067&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2079-34802020000100067&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract To evaluate the probiotic effect of a mixture of Bacillus subtilis 20Bp and Lactobacillus brevis 40Lp on productive and health indicators of broilers, a total of 400 Cobb 500® chicks were used. A completely randomized design was applied and two treatments were established: control and probiotic, with 200 animals each. In the control, only the feeding formulas of the farm were applied, and in the probiotic a probiotic mixture was supplied, in doses of 1 mL per kg of food (109 ufc.g-1).The live weight, average daily gain, cumulative food intake and food conversion were calculated as productive indicators weekly recorded until the end of breeding. Among the health indicators, the viability and mortality were evaluated. It was found that the productive parameters improved with the use of the probiotic mixture, with an average daily gain of 65.61 g, while 56.96 g were produced in the control group. The application of the mixture improved the food conversion to 1.70, when compared to the control results (1.93, and the mortality was higher in the latter. It is concluded that the use of the probiotic mixture in the production of broilers favored the productive and health parameters evaluated.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Para evaluar el efecto probiótico de una mezcla de Bacillus subtilis 20Bp y Lactobacillus brevis 40Lp en indicadores productivos y de salud de pollos de ceba, se utilizaron 400 pollitos Cobb 500. Se aplicó un diseño completamente aleatorizado y se establecieron dos tratamientos: control y probiótico, con 200 animales cada uno. En el control, solo se aplicaron las fórmulas de alimentación de la granja, y en el probiótico se suministró una mezcla probiótica, en dosis de 1 mL por kg de alimento (109 ufc.g-1). Se determinó el peso vivo, la ganancia media diaria, el consumo de alimento acumulado y la conversión alimentaria, como indicadores productivos registrados semanalmente hasta finalizar la crianza. Entre los indicadores de salud, se evaluó la viabilidad y mortalidad. Se comprobó que los indicadores productivos mejoraron con la utilización de la mezcla probiótica, con ganancia media diaria de 65.61 g, mientras que en el grupo control se produjeron 56.96 g. La aplicación de la mezcla mejoró la conversión alimentaria a 1.70, si se compara con los resultados del control (1.93, y la mortalidad, fue superior en este último. Se concluye que el uso de la mezcla probiótica en la producción de pollos de engorde favoreció los parámetros productivos y de salud evaluados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[zootechnical additives]]></kwd>
<kwd lng="en"><![CDATA[probiotics]]></kwd>
<kwd lng="en"><![CDATA[birds]]></kwd>
<kwd lng="es"><![CDATA[aditivos zootécnicos]]></kwd>
<kwd lng="es"><![CDATA[probióticos]]></kwd>
<kwd lng="es"><![CDATA[aves]]></kwd>
</kwd-group>
</article-meta>
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