<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792013000300135</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Contaminación fecal en agua potable del Valle de Juárez]]></article-title>
<article-title xml:lang="en"><![CDATA[Fecal indicators in drinking water at Juarez Valley]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olivas Enríquez]]></surname>
<given-names><![CDATA[Evangelina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores Márgez]]></surname>
<given-names><![CDATA[Juan Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Di Giovanni]]></surname>
<given-names><![CDATA[George D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Corral Díaz]]></surname>
<given-names><![CDATA[Baltazar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Osuna Avila]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Ciudad Juárez  ]]></institution>
<addr-line><![CDATA[Ciudad Juárez Chihuahua]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,The University of Texas Health Science Center at Houston ]]></institution>
<addr-line><![CDATA[Houston TX]]></addr-line>
<country>USA</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2013</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2013</year>
</pub-date>
<volume>31</volume>
<numero>2</numero>
<fpage>135</fpage>
<lpage>143</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792013000300135&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792013000300135&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792013000300135&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La población del Valle de Juárez, Chihuahua, presenta una alta prevalencia de parasitosis gastrointestinales, lo cual motivó este estudio para determinar la calidad microbiológica del agua de beber como uno de los posibles factores diseminadores de patógenos. Se evaluó la calidad sanitaria del agua de uso doméstico proveniente de pozos, mediante el uso de microorganismos indicadores y evaluación de la concentración de cloro en 14 comunidades del Valle de Juárez. Los parásitos Cryptosporidium parvum y Giardia lamblia se detectaron mediante una técnica de separación inmunomagnética seguida por tinción con inmunofluoresceína, para su identificación y conteo. Las bacterias coliformes totales y el coliforme fecal Escherichia coli se aislaron y contaron por el método de filtración por membrana. El 92.8 % de las localidades mostró la presencia de coliformes totales en muestras de agua, aunque fueron negativas a E. coli. Se demostró la presencia de ooquistes de Cryptosporidium y Giardia en el agua del 92.3 % de las localidades. Se puede inferir de los resultados, la necesidad de promover mecanismos de control de calidad y procesamiento del líquido en las comunidades consideradas en este estudio, ya que la cloración no está siendo efectiva y por ende, se requiere que se intensifique la vigilancia en la red de distribución para disminuir la prevalencia de enfermedades gastrointestinales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: The population of Juárez Valley, Chihuahua, has a high incidence of gastrointestinal parasites. For this reason, this study was conducted to determine the microbiological quality of drinking water as one of the possible factors that disseminate pathogens. Sanitary quality of drinking water from wells was determined in 14 rural communities of the Juarez Valley through the use of indicator microorganisms. The parasites Cryptosporidium parvum and Giardia lamblia were detected by an immunomagnetic separation technique followed by an inmunofluorescence method to identify and count them. Coliform bacteria and fecal bacteria E. coli were isolated and detected by the membrane filtration method. A total of 92.8% of the sites evaluated evidenced the presence of coliforms in water samples. These samples, however, were negative for E. coli, which means there is no fecal contamination. Also, the presence of Cryptosporidium and Giardia oocysts were detected in water from 92.3% of the sites. These results suggest the need to promote mechanisms of quality control and processing of water in the communities considered in this study since chlorination has not been effective. Intensified surveillance is required in the water distribution network to reduce incidence of gastrointestinal diseases.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cryptosporidium]]></kwd>
<kwd lng="es"><![CDATA[Giardia]]></kwd>
<kwd lng="es"><![CDATA[coliformes totales]]></kwd>
<kwd lng="es"><![CDATA[E. coli]]></kwd>
<kwd lng="es"><![CDATA[agua contaminada]]></kwd>
<kwd lng="en"><![CDATA[Cryptosporidium]]></kwd>
<kwd lng="en"><![CDATA[Giardia]]></kwd>
<kwd lng="en"><![CDATA[total coliforms]]></kwd>
<kwd lng="en"><![CDATA[E. coli]]></kwd>
<kwd lng="en"><![CDATA[contaminated water]]></kwd>
</kwd-group>
</article-meta>
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