<?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>1870-199X</journal-id>
<journal-title><![CDATA[Revista odontológica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Odont. Mex]]></abbrev-journal-title>
<issn>1870-199X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Odontología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-199X2006000300119</article-id>
<article-id pub-id-type="doi">10.22201/fo.1870199xp.2006.10.3.15899</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Ocurrencia de bacilos Gram negativos no fastidiosos y levaduras en la microbiota subgingival de pacientes chilenos con periodontitis]]></article-title>
<article-title xml:lang="en"><![CDATA[Occurrence of non fastidious Gram negative rods and yeasts in the subgingival microbiota of Chilean periodontitis patients]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva Steffens]]></surname>
<given-names><![CDATA[Nora]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gamonal Aravena]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gajardo Ramírez]]></surname>
<given-names><![CDATA[Marta]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Chile Facultad de Odontología Departamento de Patología, Área de Microbiología]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Chile Facultad de Odontología Departamento de Odontología Conservadora, Área de Periodoncia]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2006</year>
</pub-date>
<volume>10</volume>
<numero>3</numero>
<fpage>119</fpage>
<lpage>125</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-199X2006000300119&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-199X2006000300119&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-199X2006000300119&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes y objetivos Grupos definidos de bacterias patógenas presentes en la microbiota subgingival se han asociado con periodontitis; actualmente, la terapia periodontal convencional tiende a la supresión o erradicación de patógenos periodontales específicos. En algunos pacientes se han podido observar casos de mala respuesta o de refractariedad a la terapia periodontal. Autores han asociado este hecho, en parte, a la presencia de patógenos inusuales en el saco periodontal, razón por la cual, el objetivo de este estudio fue determinar la ocurrencia de bacilos Gram negativos no fastidiosos y levaduras en la microbiota subgingival de un grupo de pacientes chilenos con periodontitis (crónica y agresiva).  Material y métodos  Se tomaron muestras de placa subgingival a 75 pacientes con periodontitis (crónica o agresiva), utilizando conos de papel, los que fueron depositados en RTF frío (4°C) y transportados al laboratorio para su procesamiento.  Resultados  Se determinó que un 22.6% de pacientes presentaba bacilos Gram negativos no fastidiosos y un 9.3% levaduras, el 64.8% de los aislados se identificó como Alcaligenes faecalis, el 17.6% Escherichia coli y el 17.6% restante fue Pseudomonas aeruginosa.  Conclusiones  No hubo diferencia significativa entre ambos tipos de periodontitis (p &gt; 0.05).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background and aim Groups of defined bacteria in the subgingival microbiota have been associated with periodontitis. Therefore, periodontal therapy is directed toward the suppression or elimination of particular periodontal pathogens. Some patients are refractory or poorly responsive to periodontal therapy. Some authors have related them with the presence of unusual pathogens in the subgingival microbiota. Thus, the aim of this work was to study the prevalence of non fastidious Gram negative rods and yeasts in the subgingival microbiota of a group of Chilean aggressive and chronic periodontitis patients.  Material and methods  Subgingival plaque samples from of 75 periodontitis patients (chronic or aggressive) were obtained with paper points and deposited in cold RTF (4°C) to be analyzed immediately.  Results  22.6% of patients harbored non fastidious Gram negative rods, and yeasts a 9.3% of them. In the first group 64.8% of isolates was Alcaligenes faecalis, 17.6% Escherichia coli and the other 17.6% was Pseudomonas aeruginosa.  Conclusions No significant difference was observed between both groups of periodontitis patients (p &gt; 0.05).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Periodontitis]]></kwd>
<kwd lng="es"><![CDATA[bacilos Gram negativos no fastidiosos]]></kwd>
<kwd lng="es"><![CDATA[levaduras]]></kwd>
<kwd lng="es"><![CDATA[microbiota subgingival]]></kwd>
<kwd lng="en"><![CDATA[Periodontitis]]></kwd>
<kwd lng="en"><![CDATA[non fastidious Gram negative rods]]></kwd>
<kwd lng="en"><![CDATA[yeasts]]></kwd>
<kwd lng="en"><![CDATA[subgingival microbiota]]></kwd>
</kwd-group>
</article-meta>
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