<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992017000200199</article-id>
<article-id pub-id-type="doi">10.20937/rica.2017.33.02.02</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[PATRONES ESPACIO TEMPORALES DE LA CONDICIÓN MICROBIOLÓGICA DEL AGUA DE FUENTES COMUNITARIAS Y AMENAZAS A LA SALUD FAMILIAR EN CUENCAS ESTACIONALES DEL BAJO BALSAS (MÉXICO)]]></article-title>
<article-title xml:lang="en"><![CDATA[SPATIO-TEMPORAL PATTERNS IN THE MICROBIOLOGICAL CONDITION OF COMMUNITY WATER SOURCES AND THREATS TO FAMILY HEALTH IN SEASONAL WATERSHEDS OF THE BAJO BALSAS (MEXICO)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Burgos]]></surname>
<given-names><![CDATA[Ana Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alvarado Bautista]]></surname>
<given-names><![CDATA[Margarita]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Páez Bistrain]]></surname>
<given-names><![CDATA[Rosaura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Morales]]></surname>
<given-names><![CDATA[Rubén]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Investigaciones en Geografía Ambiental ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Facultad de Biología Laboratorio de Biología Acuática]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<volume>33</volume>
<numero>2</numero>
<fpage>199</fpage>
<lpage>213</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992017000200199&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992017000200199&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992017000200199&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La baja calidad microbiológica del agua rural es un problema extendido en los países en desarrollo; en México su magnitud es incierta. Se determinaron las variaciones espaciales y estacionales de la condición microbiológica del agua en fuentes rurales de un sistema hidrográfico tropical seco y se caracterizó el manejo doméstico del agua para valorar las amenazas a la salud familiar. Durante dos años se analizaron veintidós fuentes de agua en dieciocho localidades en dos momentos contrastantes del año, al final de los periodos seco y lluvioso. La condición microbiológica de las fuentes resultó deficiente por la presencia de 35 especies coliformes termotolerantes; diez fueron coliformes de alta importancia patogénica (CAIP). La contaminación fue más severa en el periodo lluvioso por el incremento significativo en la riqueza de CAIP y en el número de sitios afectados a diferentes altitudes y órdenes de corriente dentro de las cuencas. El 49 % de las familias rurales (n = 203) indicó el uso de técnicas domésticas de desinfección lo cual resultó asociado con el acceso a información. El 45 % declaró padecer anualmente enfermedades transmitidas por el agua (diarreas, dolor abdominal, fiebre y vómitos), aunque el 72 % de los casos que acuden a los servicios médicos quedaron sin diagnóstico clínico. La mayor contaminación por CAIP en el periodo lluvioso responde al transporte y lixiviación de desechos fecales acumulados en el periodo seco en áreas ribereñas, provenientes del ganado, fauna silvestre y población humana sin servicios sanitarios. El difícil control de la contaminación difusa resalta la importancia de incrementar la información y seguimiento a la población campesina vulnerable como parte de estrategias de seguridad hídrica en las cuencas rurales estacionales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The poor microbiological quality of rural water is a problem in developing countries; in Mexico, its magnitude is uncertain. Spatial and seasonal variations of the microbiological condition of water sources in a dry tropical hydrographic system were determined, and the domestic water management was characterized to assess threats to family health. Twenty-two sources in eighteen localities, in dry and rainy seasons, were analyzed during two years. The microbiological condition of the sources was deficient by the presence of 35 species of thermotolerant coliforms, ten of them with high pathogenic importance (HPI). The pollution was most severe during rainy season due to the significant increase in the richness of HPI species and the number of sites affected at different altitudes and order flow within the watersheds. The use of water disinfection techniques was registered in 49 % of the surveyed families, who pointed out also have received information about the topic. The 45 % of interviewed declared suffering from diseases transmitted by water (diarrhea, abdominal pain, fever and vomiting) annually, although 72 % of the cases exposed to medical services had not been diagnosed. The highest contamination by HPI in rainfall season responds to the transportation and leaching of fecal material accumulated along dry season in riparian areas coming from livestock, wildlife and human population without sanitation services. The difficult control of diffuse pollution highlights the importance of increasing the information and monitoring of the household water management by rural vulnerable population as part of strategies for water security in seasonal rural watersheds.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[calidad microbiológica del agua]]></kwd>
<kwd lng="es"><![CDATA[seguridad hídrica]]></kwd>
<kwd lng="es"><![CDATA[enfermedades relacionadas con el agua]]></kwd>
<kwd lng="es"><![CDATA[trópico seco]]></kwd>
<kwd lng="es"><![CDATA[cuenca del Río Balsas]]></kwd>
<kwd lng="en"><![CDATA[microbiological water quality]]></kwd>
<kwd lng="en"><![CDATA[water security]]></kwd>
<kwd lng="en"><![CDATA[water-related diseases]]></kwd>
<kwd lng="en"><![CDATA[rural watersheds]]></kwd>
<kwd lng="en"><![CDATA[Balsas River basin]]></kwd>
</kwd-group>
</article-meta>
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