<?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>0864-0300</journal-id>
<journal-title><![CDATA[Revista Cubana de Investigaciones Biomédicas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cubana Invest Bioméd]]></abbrev-journal-title>
<issn>0864-0300</issn>
<publisher>
<publisher-name><![CDATA[ECIMED]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0864-03002021000400007</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Hallazgos ultraestructurales renales de pacientes con nefritis intersticial crónica de las comunidades agrícolas en El Salvador]]></article-title>
<article-title xml:lang="en"><![CDATA[Renal ultrastructural findings of patients with chronic interstitial nephritis from farming communities in El Salvador]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Marín]]></surname>
<given-names><![CDATA[Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orantes-Navarro]]></surname>
<given-names><![CDATA[Carlos Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera-Valdés]]></surname>
<given-names><![CDATA[Raúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almaguer-López]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bacallao Méndez]]></surname>
<given-names><![CDATA[Raymed Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vela-Parada]]></surname>
<given-names><![CDATA[Xavier Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Henríquez Ticas]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gavarrete-Escobar]]></surname>
<given-names><![CDATA[Esmeralda]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vázquez-Martul]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Nefrología &#8220;Dr. Abelardo Buch López&#8221;  ]]></institution>
<addr-line><![CDATA[ La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Ministerio de Salud Dirección de Enfermedades No Transmisibles ]]></institution>
<addr-line><![CDATA[ San Salvador]]></addr-line>
<country>El Salvador</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Brigham and Women&#8217;s Hospital  ]]></institution>
<addr-line><![CDATA[ Boston]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Massachusetts General Hospital  ]]></institution>
<addr-line><![CDATA[ Boston]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Baylor College of Medicine  ]]></institution>
<addr-line><![CDATA[Houston Texas]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Hospital Nacional Rosales  ]]></institution>
<addr-line><![CDATA[ San Salvador]]></addr-line>
<country>El Salvador</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Complejo Hospitalario Universitario A Coruña (CHUAC)  ]]></institution>
<addr-line><![CDATA[ La Coruña]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>40</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0864-03002021000400007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0864-03002021000400007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0864-03002021000400007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  Desde hace 20 años se presenta en Centroamérica una enfermedad renal crónica que fundamentalmente afecta a hombres agricultores y no asociada a las causas tradicionales. Se caracteriza por presentar una nefritis intersticial crónica, en tanto las características ultraestructurales no se conocen con exactitud. En su origen se invoca el uso de agroquímicos y otros agentes nefrotóxicos, la deshidratación crónica, el consumo de medicamentos, entre otros factores.  Objetivo: Describir las características ultraestructurales de la nefritis intersticial crónica en comunidades agrícolas.  Método:  Se realizó un estudio descriptivo de corte transversal. Se estudiaron muestras de biopsias renales de ocho pacientes con diagnóstico de nefritis intersticial crónica de las comunidades agrícolas.  Resultados:  De los ocho pacientes estudiados, dos (25 %) trabajaban en labores agrícolas y cinco eran del sexo femenino (62,5 %). Dos de los pacientes (25 %) presentaban una enfermedad renal crónica estadio 2, y seis (75 %) estadio 3. En cinco pacientes se hallaron fagolisosomas con presencia de componente lipídico entremezclado con material electrodenso en células del túbulo distal. En igual cantidad de pacientes se observaron cuerpos mieloides con zonas laminadas y núcleo central en células de túbulo proximal y de los vasos sanguíneos.  Conclusiones: En pacientes de comunidades agrícolas que padecen nefritis intersticial crónica se evidencian fagolisosomas y estructuras mieloides en túbulos y vasos renales, cuyo contenido y origen se desconocen.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  Chronic kidney disease mainly affecting male farmers and not associated to traditional causes has been present in Central America for twenty years. The condition is characterized by the presence of chronic interstitial nephritis, but its ultrastructural features are not fully known. Factors suggested as responsible for its occurrence include the use of agrochemicals and other nephrotoxic agents, chronic dehydration and medicine consumption.  Objective: Describe the ultrastructural characteristics of chronic interstitial nephritis in farming communities.  Method:  A cross-sectional descriptive study was conducted of renal biopsy samples from eight patients diagnosed with chronic interstitial nephritis in farming communities.  Results:  Of the eight patients studied, two (25%) were farm workers and five (62.5%) were female. Two of the patients (25%) had stage 2 and six (75%) stage 3 chronic kidney disease. In five patients evidence was found of phagolysosomes with lipid component mixed with electrodense material in distal tubule cells. An equal number of patients had myeloid bodies with laminated areas and central nucleus in proximal tubule and blood vessel cells.  Conclusions: Evidence of phagolysosomes and myeloid structures of unknown content and origin was found in renal tubules and vessels of patients from farming communities diagnosed with chronic interstitial nephritis.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[microscopía electrónica]]></kwd>
<kwd lng="es"><![CDATA[enfermedad renal crónica]]></kwd>
<kwd lng="es"><![CDATA[nefritis intersticial crónica]]></kwd>
<kwd lng="en"><![CDATA[electron microscopy]]></kwd>
<kwd lng="en"><![CDATA[chronic kidney disease]]></kwd>
<kwd lng="en"><![CDATA[chronic interstitial nephritis]]></kwd>
</kwd-group>
</article-meta>
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