<?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>1659-4266</journal-id>
<journal-title><![CDATA[Cuadernos de Investigación UNED]]></journal-title>
<abbrev-journal-title><![CDATA[Cuadernos de Investigación UNED]]></abbrev-journal-title>
<issn>1659-4266</issn>
<publisher>
<publisher-name><![CDATA[Universidad Estatal a Distancia de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-42662023000100159</article-id>
<article-id pub-id-type="doi">10.22458/urj.v15i1.4339</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Contaminación del agua del río Durazno, Costa Rica: más allá del índice holandés de calidad del agua]]></article-title>
<article-title xml:lang="en"><![CDATA[Pollution of the Durazno River water, Costa Rica: beyond the dutch water quality index]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[Douglas Alberto Venegas]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora]]></surname>
<given-names><![CDATA[Eric Morales]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrantes-Jiménez]]></surname>
<given-names><![CDATA[Kenia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[Eddy Gómez]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuentes-Schweizer]]></surname>
<given-names><![CDATA[Paola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Irías-Mata]]></surname>
<given-names><![CDATA[Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Facultad de Ciencias Básicas Escuela de Química]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica Instituto de Investigaciones en Salud ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Costa Rica Instituto de Investigaciones en Salud ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigaciones en Ciencias del Mar y Limnología ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Costa Rica Facultad de Ciencias Básicas Escuela de Química]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad de Costa Rica Centro para Investigaciones en Granos y Semillas ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<volume>15</volume>
<numero>1</numero>
<fpage>159</fpage>
<lpage>168</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-42662023000100159&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-42662023000100159&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-42662023000100159&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Introducción: La microcuenca del río Durazno en Costa Rica es fuente de agua para consumo humano, pero se sospecha de contaminación microbiológica por varios usos del suelo. Objetivo: Evaluar la calidad del agua de la microcuenca del Durazno desde el punto de vista fisicoquímico, microbiológico y antibiótico. Métodos: Utilizamos el índice holandés de calidad del agua; Métodos Estándar para el Examen de Agua y Aguas Residuales; y extracción en fase sólida y cromatografía líquida de ultra alta resolución con espectrometría de masas en tándem. Resultados: Si bien los parámetros fisicoquímicos indicaron una calidad de agua adecuada, microbiológicamente esta agua no es aceptable para el consumo humano. El agua tiene doxiciclina y cefotaxima, posiblemente de origen agrícola. Este es el primer reporte de Cefotaxima en agua de Costa Rica. El índice holandés no tiene en cuenta parámetros microbiológicos que también son importantes. Conclusión: El río Durazno no cumple con los estándares para consumo humano de agua y el índice holandés necesita ser complementado con parámetros microbiológicos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Introduction: The micro-basin of the Durazno River in Costa Rica is a source of water for human consumption, but is suspected of microbiological pollution from several land uses. Objective: To assess the water quality of the Durazno micro-basin from the physicochemical, microbiological and antibiotics points of view. Methods: We used the Dutch Water Quality index; Standard Methods for the Examination of Water and Wastewater; and solid-phase extraction and ultra-high performance liquid chromatography coupled to tandem mass spectrometry. Results: While physicochemical parameters indicated an adequate water quality, microbiologically this water is not acceptable for human consumption. The water has Doxycycline and Cefotaxime, possibly of agricultural origin. This is the first report of Cefotaxime in water from Costa Rica. The Dutch index fails to take into account microbiological parameters that are also important. Conclusion: The Durazno River does not meet the standards for human water consumption and the Dutch index needs to be complemented with microbiological parameters.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Water pollution]]></kwd>
<kwd lng="en"><![CDATA[indicators]]></kwd>
<kwd lng="en"><![CDATA[water quality]]></kwd>
<kwd lng="en"><![CDATA[antibiotics]]></kwd>
<kwd lng="en"><![CDATA[SPE-UHPLC-MS/MS.]]></kwd>
<kwd lng="es"><![CDATA[Contaminación del agua]]></kwd>
<kwd lng="es"><![CDATA[indicadores]]></kwd>
<kwd lng="es"><![CDATA[calidad del agua]]></kwd>
<kwd lng="es"><![CDATA[antibióticos]]></kwd>
<kwd lng="es"><![CDATA[SPE-UHPLC-MS/MS.]]></kwd>
</kwd-group>
</article-meta>
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