<?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>0034-7744</journal-id>
<journal-title><![CDATA[Revista de Biología Tropical]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. biol. trop]]></abbrev-journal-title>
<issn>0034-7744</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-77442019000100001</article-id>
<article-id pub-id-type="doi">10.15517/rbt.v67i1.33280</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Antibacterial activity of the skin secretion of Phyllomedusa azurea (Anura: Hylidae) from the Central Brazil Cerrado]]></article-title>
<article-title xml:lang="es"><![CDATA[Actividad antibacterial de secreciones de la piel de Phyllomedusa azurea (Anura: Hylidae) en Cerrado, Brasil centro]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De Almeida]]></surname>
<given-names><![CDATA[Daniela Andrade]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dietz]]></surname>
<given-names><![CDATA[Jefferson do Carmo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De Oliveira]]></surname>
<given-names><![CDATA[Bruno Francesco Rodrigues]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vieira]]></surname>
<given-names><![CDATA[José Daniel Gonçalves]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Magalhães]]></surname>
<given-names><![CDATA[Marta Regina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jesuíno]]></surname>
<given-names><![CDATA[Rosália Santos Amorim]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Federal University of Goiás  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Federal University of Goiás  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Pontifical Catholic University of Goiás  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<volume>67</volume>
<numero>1</numero>
<fpage>1</fpage>
<lpage>10</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442019000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0034-77442019000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0034-77442019000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Phyllomedusa azurea is a frog species well distributed geographically in South America, including Brazilian biomes as Pantanal and Cerrado. Compared with other anurans from the Phyllomedusinae family, there are few reports on the bioactive potential of skin-derived molecules from this species. In this perspective, the aim of the present study was to evaluate the in vitro antibacterial activity of skin secretion of P. azurea by detection of Minimum Inhibitory Concentration (MIC) of the growth of bacterial indicator strains and to determine if occurs a changing in the bacterial cell envelope permeability. The MIC determination was carried out by the microdilution plate method. The absorbance was measured and analyzed statistically using the t-test to compare two groups (0.05 % of significance). The impact of the crude extract on cell envelope permeability of Staphylococcus aureus ATCC 25923 was conducted by the crystal violet assay, and the absorbance was measured spectrophotometry followed by the calculation of the crystal violet uptake percentage. The specific MIC for S. aureus ATCC 25923 and Escherichia coli ATCC 25922 was 31.25 µg/mL, while for Bacillus subtilis ATCC 6633 was 125 µg/mL and Pseudomonas aeruginosa ATCC 27853 was 250 µg/mL. The treatment with crescent concentrations of frog skin secretion increased the crystal violet uptake by S. aureus ATCC 25923 cells, suggesting an action on the cell plasma membrane. The results demonstrated that the skin secretion of P. azurea presents antibacterial activity and merit further investigations to characterize the bioactive molecules.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen P. azurea es una especie de rana bien distribuida geográficamente en América del Sur, que incluye biomas brasileños como Pantanal y Cerrado. En comparación con otros anuros de Phyllomedusinae, existen pocos informes sobre el potencial bioactivo de las moléculas derivadas de la piel de esta especie. En esta perspectiva, el objetivo del presente estudio fue evaluar la actividad antibacteriana in vitro de la secreción de la piel de P. azurea mediante la detección de la Concentración Inhibitoria Mínima (CIM) del crecimiento de cepas indicadoras bacterianas y determinar si ocurre un cambio en la permeabilidad de la envoltura celular bacteriana. La determinación de MIC se llevó a cabo mediante el método de la placa de microdilución. La absorbancia se midió y se analizó estadísticamente mediante la prueba t para comparar dos grupos (0.05 de significancia). El impacto del extracto crudo sobre la permeabilidad de la envoltura celular de Staphylococcus aureus ATCC 25923 se realizó mediante el ensayo de cristal violeta, y se midió la absorbancia mediante espectrofotometría seguida del cálculo del porcentaje de absorción de violeta cristal. La CIM específica para S. aureus ATCC 25923 y Escherichia coli ATCC 25922 fue 31.25 &#956;g / ml, mientras que para Bacillus subtilis ATCC 6633 de 125 &#956;g / ml y Pseudomonas aeruginosa ATCC 27853 de 250 &#956;g / ml. El tratamiento con concentraciones crecientes de secreción de piel de rana aumentó la absorción de violeta cristal por las células de S. aureus ATCC 25923, sugiriendo una acción sobre la membrana plasmática de la célula. Los resultados demostraron que la secreción de la piel de P. azurea presenta actividad antibacteriana y amerita más investigaciones para caracterizar las moléculas bioactivas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[amphibian]]></kwd>
<kwd lng="en"><![CDATA[antibacterial activity]]></kwd>
<kwd lng="en"><![CDATA[Phyllomedusa azurea]]></kwd>
<kwd lng="en"><![CDATA[skin secretion]]></kwd>
<kwd lng="es"><![CDATA[anfíbio]]></kwd>
<kwd lng="es"><![CDATA[actividad antibacteriana]]></kwd>
<kwd lng="es"><![CDATA[Phyllomedusa azurea]]></kwd>
<kwd lng="es"><![CDATA[secreción cutánea]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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