<?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>1315-0162</journal-id>
<journal-title><![CDATA[Saber]]></journal-title>
<abbrev-journal-title><![CDATA[Saber]]></abbrev-journal-title>
<issn>1315-0162</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Oriente]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1315-01622016000400010</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Características clínicas y epidemiológicas de enterobiasis en niños escolarizados de una zona rural del estado falcón, Venezuela]]></article-title>
<article-title xml:lang="en"><![CDATA[CLINICAL AND EPIDEMIOLOGICAL CHARACTERISTICS OF ENTEROBIASIS IN RURAL SCHOLAR CHILDREN FROM FALCON STATE, VENEZUELA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[PERFETTI]]></surname>
<given-names><![CDATA[DALMIRO CAZORLA]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[ACOSTA-QUINTERO]]></surname>
<given-names><![CDATA[MARÍA]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MORALES-MORENO]]></surname>
<given-names><![CDATA[PEDRO]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="A">
<institution><![CDATA[,  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>28</volume>
<numero>4</numero>
<fpage>750</fpage>
<lpage>760</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_arttext&amp;pid=S1315-01622016000400010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_abstract&amp;pid=S1315-01622016000400010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_pdf&amp;pid=S1315-01622016000400010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[El entero-helminto Enterobius vermicularis es el agente causal de la enterobiasis u oxiuriasis, la cual se encuentra con mayor prevalencia en niños. Se realizó un estudio para determinar la prevalencia y los parámetros clínicos y epidemiológicos de la enterobiasis en niños escolarizados de la población rural El Paso Acurigua, estado Falcón, Venezuela. El estudio de tipo descriptivo, prospectivo y transversal, se llevó a cabo entre noviembre 2006 y abril de 2007, en un total de 82 niños. Para la identificación de los probables factores de riesgo asociados a la enterobiasis se usó una ficha encuesta-epidemiológica. El diagnóstico parasitológico se realizó con el método de la cinta adhesiva. Los síntomas asociados a oxiuriasis se determinaron mediante evaluación clínica. La prevalencia global de enterobiasis fue 40,2% (33/82), con porcentajes de infección significativamente mayores en varones (p = 0,001). Los síntomas significativamente asociados a enterobiasis fueron el prurito anal (p = 0,001), la intranquilidad (p = 0,002), el bruxismo (p = 0,000) y el dolor abdominal (p = 0,02). Con la aplicación del análisis de regresión logística múltiple (ARLM) se determinó como potenciales factores de riesgo independientes significativamente involucrados en la transmisión de la enterohelmintiasis: el prurito anal [Odds Ratio (OR) = 3,6], la onicofagia (OR = 2,8), tener uñas sucias (OR = 6,3), jugar con mascotas (OR = 2,0), defecar en pozo séptico (OR = 2,3) y el hacinamiento (&#8805; 6 personas/casa: OR = 19,8; &#8805; 3 personas/habitación: OR = 1,8). En conclusión se determinó una elevada prevalencia de enterobiasis (40,2%) en niños escolarizados de la comunidad rural El Paso Acurigua, estado Falcón, Venezuela. Por ello, se recomienda mejorar las condiciones socio-sanitarias del sector, y mantener campañas de promoción y educación para salud.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The enteric helminth Enterobius vermicularis is the causal agent of enterobiasis or oxyuriasis, which is most prevalent in children. A study was designed to determine the prevalence and clinical and epidemiological profiles of enterobiasis in preschool and elementary school children of El Paso Acurigua, Falcon state, Venezuela. The descriptive, prospective and cross-sectional survey was performed from November 2006 to April 2007, in a total of 82 children. Probable risk factors for enterobiasis were identified by using epidemiological questionnaires. Symptoms associated to enterobiasis were determined by means of clinical examination. The diagnosis of pinworm infection was made by adhesive cellulose tape. The overall prevalence of enterobiasis was 40.24% (33/82), with significantly higher percentages of infection in boys (p = 0.001). Anal pruritus (p = 0.001), restlessness (p = 0.002), bruxism (p < 0.000) and abdominal pain (p = 0.02) were the symptoms significantly associated with enterobiasis. Multiple logistic regression analysis allowed the determination of independent potential risk factors for transmission of this enterohelminthiasis: anal pruritus [Odds Ratio (OR) = 3.6], onycophagy (OR = 2.8), dirty fingernails (OR = 6.3), pet playing (OR = 2.0), defecation on septic tank (OR = 2.3) and overcrowding (&#8805; 6 persons/household: OR = 19.8; &#8805; 3 persons/room: OR = 1.8). Enterobiasis remains highly prevalent among school children from “El Paso Acurigua”. Thus, improving standards of living and personal-community hygiene as well as education campaigns, are advised.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Oxiuriasis]]></kwd>
<kwd lng="es"><![CDATA[epidemiología]]></kwd>
<kwd lng="es"><![CDATA[manifestaciones clínicas]]></kwd>
<kwd lng="es"><![CDATA[niños]]></kwd>
<kwd lng="en"><![CDATA[Oxyuriasis]]></kwd>
<kwd lng="en"><![CDATA[epidemiology]]></kwd>
<kwd lng="en"><![CDATA[clinical manifestations]]></kwd>
<kwd lng="en"><![CDATA[children]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <div style="text-align: justify; font-family: Verdana;">     <div style="text-align: center;"><font style="font-weight: bold;" size="-1">CARACTER&Iacute;STICAS CL&Iacute;NICAS Y EPIDEMIOL&Oacute;GICAS DE ENTEROBIASIS EN NI&Ntilde;OS ESCOLARIZADOS DE UNA ZONA RURAL DEL ESTADO FALC&Oacute;N, VENEZUELA </font><br style="font-weight: bold;">    <br style="font-weight: bold;">    <font style="font-weight: bold;" size="-1">DALMIRO CAZORLA-PERFETTI,MAR&Iacute;A ACOSTA-QUINTERO ,PEDRO MORALES-MORENO    <br>        <br>    </font></div>    <font size="-1">Universidad Nacional Experimental Francisco de Miranda (UNEFM), Decanato de Investigaciones, Centro de Investigaciones Biom&eacute;dicas (CIB), Laboratorio de Entomolog&iacute;a, Parasitolog&iacute;a y Medicina Tropical (LEPAMET), Coro, Venezuela.E-mail: lutzomyia@hotmail.com / cdalmiro@gmail.com     <br>        <br>    <span style="font-weight: bold;">RESUMEN</span>     <br>        <br>    El entero-helminto Enterobius vermicularis es el agente causal de la enterobiasis u oxiuriasis, la cual se encuentra con mayor prevalencia en ni&ntilde;os. Se realiz&oacute; un estudio para determinar la prevalencia y los par&aacute;metros cl&iacute;nicos y epidemiol&oacute;gicos de la enterobiasis en ni&ntilde;os escolarizados de la poblaci&oacute;n rural El Paso Acurigua, estado Falc&oacute;n, Venezuela. El estudio de tipo descriptivo, prospectivo y transversal, se llev&oacute; a cabo entre noviembre 2006 y abril de&nbsp; 2007,&nbsp; en&nbsp; un&nbsp; total&nbsp; de&nbsp; 82&nbsp; ni&ntilde;os.&nbsp; Para&nbsp; la&nbsp; identificaci&oacute;n&nbsp; de&nbsp; los&nbsp; probables&nbsp; factores&nbsp; de&nbsp; riesgo&nbsp; asociados&nbsp; a&nbsp; la enterobiasis se us&oacute; una ficha encuesta-epidemiol&oacute;gica. El diagn&oacute;stico parasitol&oacute;gico se realiz&oacute; con el m&eacute;todo de la&nbsp; cinta&nbsp; adhesiva.&nbsp; Los&nbsp; s&iacute;ntomas&nbsp; asociados&nbsp; a&nbsp; oxiuriasis&nbsp; se&nbsp; determinaron&nbsp; mediante&nbsp; evaluaci&oacute;n&nbsp; cl&iacute;nica.&nbsp; La prevalencia global de enterobiasis fue 40,2% (33/82), con porcentajes de infecci&oacute;n significativamente mayores en varones (p = 0,001). Los s&iacute;ntomas significativamente asociados a enterobiasis fueron el prurito anal (p = 0,001), la&nbsp; intranquilidad&nbsp; (p&nbsp; =&nbsp; 0,002),&nbsp; el&nbsp; bruxismo&nbsp; (p&nbsp; =&nbsp; 0,000)&nbsp; y&nbsp; el&nbsp; dolor abdominal&nbsp; (p&nbsp; =&nbsp; 0,02).&nbsp; Con la&nbsp; aplicaci&oacute;n&nbsp; del an&aacute;lisis de regresi&oacute;n log&iacute;stica m&uacute;ltiple (ARLM) se determin&oacute; como potenciales factores de riesgo independientes significativamente involucrados en la transmisi&oacute;n de la enterohelmintiasis: el prurito anal [Odds Ratio (OR) = 3,6], la onicofagia (OR = 2,8), tener u&ntilde;as sucias (OR = 6,3), jugar con mascotas (OR = 2,0), defecar en pozo s&eacute;ptico (OR = 2,3) y el hacinamiento&nbsp; (&ge; 6 personas/casa: OR = 19,8; &ge; 3 personas/habitaci&oacute;n: OR = 1,8). En conclusi&oacute;n se determin&oacute; una elevada prevalencia de enterobiasis (40,2%) en ni&ntilde;os escolarizados de la comunidad rural&nbsp; El&nbsp; Paso&nbsp; Acurigua, estado&nbsp;Falc&oacute;n,&nbsp; Venezuela.&nbsp; Por&nbsp; ello,&nbsp; se&nbsp; recomienda&nbsp; mejorar&nbsp; las&nbsp; condiciones&nbsp; socio-sanitarias del sector, y mantener campa&ntilde;as de promoci&oacute;n y educaci&oacute;n para salud.     <br>    &nbsp;    <br>    <span style="font-weight: bold;">PALABRAS CLAVE:</span> Oxiuriasis, epidemiolog&iacute;a, manifestaciones cl&iacute;nicas, ni&ntilde;os.     ]]></body>
<body><![CDATA[<br>        <br>    </font>     <div style="text-align: center; font-weight: bold;"><font size="-1">CLINICAL AND EPIDEMIOLOGICAL CHARACTERISTICS OF ENTEROBIASIS IN RURAL SCHOLAR CHILDREN FROM FALCON STATE, VENEZUELA </font>    <br>    </div>    <font size="-1">    <br>    <span style="font-weight: bold;">ABSTRACT</span>     <br>    &nbsp;    <br>    The&nbsp; enteric&nbsp; helminth&nbsp; Enterobius&nbsp; vermicularis&nbsp; is&nbsp; the&nbsp; causal&nbsp; agent&nbsp; of&nbsp; enterobiasis&nbsp; or&nbsp; oxyuriasis,&nbsp; which&nbsp; is&nbsp; most prevalent in children. A study was designed to determine the prevalence and clinical and epidemiological profiles of enterobiasis in preschool and elementary school children of El Paso Acurigua, Falcon state, Venezuela. The descriptive, prospective and cross-sectional survey was performed from November 2006 to April 2007, in a total of&nbsp; 82&nbsp; children. Probable&nbsp; risk&nbsp; factors&nbsp; for&nbsp; enterobiasis&nbsp; were&nbsp; identified&nbsp; by&nbsp; using&nbsp; epidemiological&nbsp; questionnaires. Symptoms&nbsp; associated&nbsp; to&nbsp; enterobiasis&nbsp; were&nbsp; determined&nbsp; by&nbsp; means&nbsp; of&nbsp; clinical&nbsp; examination.&nbsp; The&nbsp; diagnosis&nbsp; of pinworm&nbsp; infection&nbsp; was&nbsp; made&nbsp; by&nbsp; adhesive&nbsp; cellulose&nbsp; tape.&nbsp; The&nbsp; overall&nbsp; prevalence&nbsp; of&nbsp; enterobiasis&nbsp; was&nbsp; 40.24% (33/82),&nbsp; with&nbsp; significantly&nbsp; higher&nbsp; percentages&nbsp; of&nbsp; infection&nbsp; in&nbsp; boys&nbsp; (p&nbsp; =&nbsp; 0.001).&nbsp; Anal&nbsp; pruritus&nbsp; (p&nbsp; =&nbsp; 0.001), restlessness (p = 0.002), bruxism (p &lt; 0.000) and abdominal pain (p = 0.02) were the symptoms&nbsp; significantly associated&nbsp; with&nbsp; enterobiasis.&nbsp; Multiple&nbsp; logistic&nbsp; regression&nbsp; analysis&nbsp; allowed&nbsp; the&nbsp; determination&nbsp; of&nbsp; independent potential&nbsp; risk&nbsp; factors&nbsp; for&nbsp; transmission&nbsp; of&nbsp; this&nbsp; enterohelminthiasis:&nbsp; anal&nbsp; pruritus&nbsp; [Odds&nbsp; Ratio&nbsp; (OR)&nbsp; =&nbsp; 3.6], onycophagy (OR = 2.8), dirty fingernails (OR = 6.3), pet playing (OR = 2.0), defecation on septic tank (OR = 2.3) and overcrowding (&ge; 6 persons/household: OR = 19.8; &ge; 3 persons/room: OR = 1.8). Enterobiasis remains highly&nbsp; prevalent&nbsp; among&nbsp; school&nbsp; children&nbsp; from&nbsp; &ldquo;El&nbsp; Paso&nbsp; Acurigua&rdquo;.&nbsp; Thus,&nbsp; improving&nbsp; standards&nbsp; of&nbsp; living&nbsp; and personal-community hygiene as well as education campaigns, are advised.     <br>    &nbsp;    <br>    <span style="font-weight: bold;">KEY WORDS:</span> Oxyuriasis, epidemiology, clinical manifestations, children.     <br>    </font><font size="-1">    ]]></body>
<body><![CDATA[<br>    Recibido:&nbsp;mayo&nbsp;2016.&nbsp;Aprobado:&nbsp;julio&nbsp;2016. Versi&oacute;n&nbsp;final:&nbsp;septiembre&nbsp;2016.</font>    <br>    <font size="-1">    <br>    <span style="font-weight: bold;">INTRODUCCI&Oacute;N</span>     <br>        <br>   La enterobiasis u oxiuriasis es ocasionada por el&nbsp; entero-helminto&nbsp; Enterobius&nbsp; vermicularis (Nematoda-Chromadorea, Plectia-Rhabditida, Oxyuridae,&nbsp; sensu&nbsp; Ruggiero&nbsp; et&nbsp; al.&nbsp; 2015), com&uacute;nmente&nbsp; conocido&nbsp; como&nbsp; oxiuro&nbsp; (Botero&nbsp; y Restrepo 2012). A pesar de que existen numerosas drogas&nbsp; antihelm&iacute;nticas&nbsp; ampliamente&nbsp; disponibles, la oxiuriasis a&uacute;n contin&uacute;a afectando a millones de seres&nbsp; humanos&nbsp; en&nbsp; todo&nbsp; el&nbsp; globo&nbsp; terr&aacute;queo, especialmente ni&ntilde;os en edad preescolar y escolar (Cook 1994, Kucik et al. 2004, Botero y Restrepo 2012,&nbsp; Kim&nbsp; y&nbsp; Yu&nbsp; 2014).&nbsp; Estas&nbsp; elevadas&nbsp; tasas&nbsp; de prevalencia&nbsp; e&nbsp; incidencia&nbsp; se&nbsp; explican&nbsp; por&nbsp; varias causas&nbsp; (e.g.,&nbsp; biol&oacute;gicas,&nbsp; conductuales,&nbsp; eco-epidemiol&oacute;gicas), incluyendo la facilidad con que E. vermicularis se adquiere individuo a individuo, ya&nbsp; que&nbsp; el&nbsp; par&aacute;sito&nbsp; posee&nbsp; hasta&nbsp; cuatro&nbsp; posibles mecanismos&nbsp; de&nbsp; transmisi&oacute;n;&nbsp; adem&aacute;s,&nbsp; se&nbsp; debe tener&nbsp; presente&nbsp; el&nbsp; uso&nbsp; inadecuado&nbsp; de&nbsp; las&nbsp; drogas antihelm&iacute;nticas&nbsp; (Hugot&nbsp; et&nbsp; al.&nbsp; 1999,&nbsp; Botero&nbsp; y Restrepo 2012).    <br>   &nbsp;    <br>   Como&nbsp; se&nbsp; ha&nbsp; venido&nbsp; insistiendo&nbsp; (Cazorla-Perfetti 2014), en Venezuela a la oxiuriasis se le considera&nbsp; como&nbsp; una&nbsp; patolog&iacute;a&nbsp; de&nbsp; poco&nbsp; inter&eacute;s, probablemente por el hecho de que por lo general la entero-helmintiasis no es fatal, adem&aacute;s de que no es de reporte obligatorio (Cazorla et al. 2006a, Maniscalchi&nbsp; et&nbsp; al.&nbsp; 2010).&nbsp; Sin&nbsp; embargo,&nbsp; aunque con&nbsp; muy&nbsp; poca&nbsp; frecuencia,&nbsp; las&nbsp; migraciones ect&oacute;picas&nbsp; de&nbsp; E.&nbsp; vermicularis&nbsp; pueden&nbsp; producir eventos&nbsp; patol&oacute;gicos&nbsp; de&nbsp; consideraci&oacute;n&nbsp; (Botero&nbsp; y Restrepo 2012, Cazorla-Perfetti 2014), e inclusive el&nbsp; deceso&nbsp; del&nbsp; individuo&nbsp; (Serpytis&nbsp; y&nbsp; Seinin&nbsp; 2012, Mizia-Stec&nbsp; et&nbsp; al.&nbsp; 2014);&nbsp; y&nbsp; de&nbsp; forma&nbsp; indirecta, principalmente&nbsp; en&nbsp; ni&ntilde;os,&nbsp; insomnio,&nbsp; cansancio&nbsp; e irritabilidad,&nbsp; lo&nbsp; que&nbsp; posiblemente&nbsp; lleve&nbsp; a&nbsp; la disminuci&oacute;n&nbsp; en&nbsp; el&nbsp; rendimiento&nbsp; escolar&nbsp; por&nbsp; el d&eacute;ficit de atenci&oacute;n (Cook 1994, Kucik et al. 2004, Botero&nbsp; y&nbsp; Restrepo&nbsp; 2012).&nbsp; A&nbsp; pesar&nbsp; de&nbsp; que usualmente no se le atribu&iacute;a a este entero-helminto efectos&nbsp; delet&eacute;reos&nbsp; sobre&nbsp; el&nbsp; estado&nbsp; nutricional&nbsp; de los ni&ntilde;os, en la actualidad se ha demostrado que E. vermicularis disminuye los niveles de macro y microelementos (cobre, hierro, zinc y magnesio), cuyas&nbsp; deficiencias&nbsp; por&nbsp; lo&nbsp; com&uacute;n&nbsp; se&nbsp; encuentran asociadas estrechamente al deterioro del crecimiento&nbsp; y&nbsp; desarrollo&nbsp; pondoestatural,&nbsp; la respuesta&nbsp; inmune&nbsp; y&nbsp; de&nbsp; la&nbsp; capacidad&nbsp; intelectual (Koltas&nbsp; et&nbsp; al.&nbsp; 1997,&nbsp; Stephenson&nbsp; et&nbsp; al.&nbsp; 2000, Ben&iacute;tez y Amor&oacute;s 2011, Cazorla-Perfetti 2014).    <br>   &nbsp;    <br>   La&nbsp; enterobiasis&nbsp; es&nbsp; altamente&nbsp; frecuente&nbsp; en&nbsp; los escolares tanto rurales como de &aacute;reas urbanas de Venezuela,&nbsp; d&aacute;ndose&nbsp; prevalencias&nbsp; en&nbsp; algunas regiones&nbsp; de&nbsp; &gt;&nbsp; 50%&nbsp; (Cazorla-Perfetti&nbsp; 2014). Similar situaci&oacute;n se observa en el estado Falc&oacute;n, regi&oacute;n&nbsp; nor-occidental,&nbsp; especialmente&nbsp; en&nbsp; &aacute;reas rurales&nbsp; de&nbsp; la&nbsp; regi&oacute;n&nbsp; semi&aacute;rida&nbsp; (Monte&nbsp; Espinoso Tropical) donde se han registrado cifras de hasta m&aacute;s&nbsp; del&nbsp; 50%&nbsp; (Acosta&nbsp; et&nbsp; al.&nbsp; 2002,&nbsp; Cazorla&nbsp; et&nbsp; al. 2006a,b,&nbsp; Humbr&iacute;a-Heyliger&nbsp; et&nbsp; al.&nbsp; 2012);&nbsp; sin embargo,&nbsp; en&nbsp; las&nbsp; otras&nbsp; &aacute;reas&nbsp; biogeogr&aacute;ficas&nbsp; de&nbsp; la entidad&nbsp; federal&nbsp; como&nbsp; el&nbsp; sistema&nbsp; monta&ntilde;oso coriano (sierra falconiana), existen pocos registros o estudios de la parasitosis intestinal aplicando el m&eacute;todo de la cinta adhesiva en la regi&oacute;n perianal.    <br>   &nbsp;    ]]></body>
<body><![CDATA[<br>   Los&nbsp; inconvenientes&nbsp; planteados&nbsp; acerca&nbsp; de&nbsp; la enterobiasis&nbsp; como&nbsp; problema&nbsp; de&nbsp; salud&nbsp; p&uacute;blica&nbsp; en Venezuela,&nbsp; y&nbsp; particularmente&nbsp; en&nbsp; la&nbsp; regi&oacute;n falconiana, ha motivado al equipo de investigaci&oacute;n&nbsp; multidisciplinario&nbsp; del&nbsp; Laboratorio de&nbsp; Entomolog&iacute;a,&nbsp; Parasitolog&iacute;a&nbsp; y&nbsp; Medicina Tropical (LEPAMET), &Aacute;rea Ciencias de la Salud,    <br>   Coro,&nbsp; estado&nbsp; Falc&oacute;n,&nbsp; Venezuela,&nbsp; a&nbsp; realizar&nbsp; un estudio&nbsp; para&nbsp; determinar&nbsp; la&nbsp; prevalencia&nbsp; y&nbsp; los par&aacute;metros&nbsp; cl&iacute;nicos&nbsp; y&nbsp; epidemiol&oacute;gicos&nbsp; de&nbsp; la infecci&oacute;n por oxiuros en ni&ntilde;os escolarizados de la poblaci&oacute;n rural de El Paso Acurigua, enclavada en el&nbsp; pie&nbsp; de&nbsp; monte&nbsp; de&nbsp; la&nbsp; serran&iacute;a&nbsp; del&nbsp; estado&nbsp; Falc&oacute;n (sistema&nbsp; monta&ntilde;oso&nbsp; coriano),&nbsp; en&nbsp; la&nbsp; regi&oacute;n&nbsp; Nor-Occidental de Venezuela.    <br>   &nbsp;    <br>   <span style="font-weight: bold;">MATERIALES Y M&Eacute;TODOS</span><br style="font-weight: bold;">   <span style="font-weight: bold;">&nbsp;</span><br style="font-weight: bold;">   <span style="font-weight: bold;">&Aacute;rea de estudio</span>    <br>   &nbsp;    <br>   El&nbsp; estudio&nbsp; de&nbsp; tipo&nbsp; descriptivo,&nbsp; prospectivo&nbsp; y transversal, se llev&oacute; a cabo entre noviembre 2006 y&nbsp; abril&nbsp; de&nbsp; 2007,&nbsp; en&nbsp; la&nbsp; poblaci&oacute;n&nbsp; de&nbsp; El&nbsp; Paso Acurigua (11&ordm;19&acute;48&acute;&acute; de latitud norte y 69&ordm;26&acute;55&acute;&acute; de&nbsp; longitud&nbsp; oeste),&nbsp; Municipio&nbsp; Colina&nbsp; del&nbsp; estado Falc&oacute;n, Venezuela (Fig. 1). La regi&oacute;n posee&nbsp; una zona bioclim&aacute;tica del tipo Bosque Seco Tropical (BST), con precipitaci&oacute;n y temperatura promedio anual&nbsp; entre&nbsp; 1.000-1.800&nbsp; mm&nbsp; y&nbsp; 22-29&ordm;C, respectivamente (Ewel et al. 1976).     <br>       <br>   <span style="font-weight: bold;">Muestra</span>    <br>   &nbsp;    <br>   De acuerdo a censo realizado, la poblaci&oacute;n de El&nbsp; Paso&nbsp; de&nbsp; Acurigua&nbsp; estaba&nbsp; integrada&nbsp; por&nbsp; 493 habitantes.&nbsp; La&nbsp; muestra&nbsp; estuvo&nbsp; conformada&nbsp; por todos&nbsp; los&nbsp; 82&nbsp; alumnos,&nbsp; 35&nbsp; (42,7%)&nbsp; del&nbsp; sexo femenino, y 47 (57,3%) varones, que representaron&nbsp; la&nbsp; matr&iacute;cula&nbsp; de&nbsp; la&nbsp; Escuela Bolivariana de El Paso de Acarigua en el periodo escolar&nbsp; 2006-2007,&nbsp; con&nbsp; edades&nbsp; comprendidas entre 3 y 14 a&ntilde;os ( &plusmn; D.S = 7,3 &plusmn; 2,7).    ]]></body>
<body><![CDATA[<br>   &nbsp;    <br>   <span style="font-weight: bold;">Consideraciones bio&eacute;ticas</span>    <br>   &nbsp;    <br>   A los habitantes, y a las autoridades sanitarias y educativas, se les notific&oacute; acerca de los objetivos del&nbsp; estudio&nbsp; antes&nbsp; de&nbsp; su&nbsp; inclusi&oacute;n,&nbsp; y&nbsp; los&nbsp; padres&nbsp; y representantes&nbsp; de&nbsp; los&nbsp; ni&ntilde;os&nbsp; firmaron&nbsp; su consentimiento&nbsp; de&nbsp; participar.&nbsp; Se&nbsp; siguieron&nbsp; las normas de bio&eacute;tica establecidas en la Declaraci&oacute;n Helsinki de la Asociaci&oacute;n M&eacute;dica Mundial en su versi&oacute;n adoptada en la LII Asamblea General de Edimburgo del a&ntilde;o 2000. Todos los resultados de los ex&aacute;menes realizados fueron entregados a cada participante. Adicionalmente, se envi&oacute; un informe a las autoridades sanitarias competentes para que aplicaran el tratamiento adecuado.    <br>   &nbsp;    <br>   <span style="font-weight: bold;">Determinaci&oacute;n de factores de riesgo </span>    <br>   &nbsp;    <br>   A&nbsp; la&nbsp; comunidad&nbsp; en&nbsp; general,&nbsp; se&nbsp; les&nbsp; dictaron charlas&nbsp; informativas&nbsp; y&nbsp; educativas&nbsp; sobre&nbsp; todo&nbsp; lo relacionado con la enterobiasis y su prevenci&oacute;n. En la identificaci&oacute;n de los probables factores de&nbsp; riesgos&nbsp; asociados&nbsp; a&nbsp; enterobiasis&nbsp; se&nbsp; us&oacute;&nbsp; una ficha&nbsp; encuesta-epidemiol&oacute;gica,&nbsp; aplicada&nbsp; a&nbsp; los representantes&nbsp; de&nbsp; cada&nbsp; ni&ntilde;o&nbsp; participante.&nbsp; Se indagaron&nbsp; datos&nbsp; epidemiol&oacute;gicos&nbsp; de&nbsp; inter&eacute;s,&nbsp; que fueron&nbsp; anotados&nbsp; en&nbsp; ficha&nbsp; ad&nbsp; hoc.&nbsp; Dicha&nbsp; ficha epidemiol&oacute;gica estuvo estructurada de la siguiente manera:&nbsp; datos&nbsp; de&nbsp; identificaci&oacute;n,&nbsp; h&aacute;bitos&nbsp; de higiene personal y familiar, estratificaci&oacute;n social; tenencia de mascotas, consentimiento informado. El&nbsp; estado&nbsp; socio-econ&oacute;mico&nbsp; de&nbsp; los&nbsp; n&uacute;cleos familiares se estableci&oacute; por el m&eacute;todo de Graffar modificado (M&eacute;ndez-Castellano 1994).    <br>   &nbsp;    <br>   Se consider&oacute; que exist&iacute;a hacinamiento cuando habitaban m&aacute;s de seis personas por casa, m&aacute;s de tres personas por habitaci&oacute;n y m&aacute;s de dos personas    ]]></body>
<body><![CDATA[<br>   por cama (Acosta et al. 2002).    <br>       <br>   <span style="font-weight: bold;">Figura&nbsp; 1.</span>&nbsp; Ubicaci&oacute;n&nbsp; geogr&aacute;fica&nbsp; de&nbsp; la&nbsp; poblaci&oacute;n&nbsp; de&nbsp; El&nbsp; Paso&nbsp; de&nbsp; Acurigua&nbsp; (11&ordm;19&acute;48&acute;&acute;&nbsp; de&nbsp; latitud&nbsp; norte&nbsp; y&nbsp; 69&ordm;26&acute;55&acute;&acute;&nbsp; de longitud oeste), municipio Colina, estado Falc&oacute;n, Venezuela.    <br>  </font>     <div style="text-align: center;"><img style="width: 514px; height: 395px;" alt="" src="/img/fbpe/saber/v28n4/art10fig1.jpg">    
<br>  </div>  <font size="-1"> &nbsp;    <br>   <span style="font-weight: bold;">Evaluaci&oacute;n cl&iacute;nica</span>    <br>   &nbsp;    <br>   La&nbsp; evaluaci&oacute;n&nbsp; cl&iacute;nica&nbsp; se&nbsp; realiz&oacute;&nbsp; con&nbsp; especial &eacute;nfasis en la b&uacute;squeda de s&iacute;ntomas generalmente asociados&nbsp; con&nbsp; la&nbsp; infecci&oacute;n&nbsp; por&nbsp; E.&nbsp; vermicularis, incluyendo,&nbsp; entre&nbsp; otros,&nbsp; prurito&nbsp; anal,&nbsp; enuresis, lesiones&nbsp; perianales,&nbsp; bruxismo,&nbsp; vulvovaginitis, intranquilidad&nbsp; (Botero&nbsp; y&nbsp; Restrepo&nbsp; 2012).&nbsp; Es importante se&ntilde;alar que tanto la evaluaci&oacute;n cl&iacute;nica y parasitol&oacute;gica fue realizada bajo la supervisi&oacute;n y&nbsp; ejecuci&oacute;n&nbsp; de&nbsp; la&nbsp; m&eacute;dico&nbsp; especialista&nbsp; del&nbsp; grupo (MAQ).    <br>   &nbsp;    ]]></body>
<body><![CDATA[<br>   <span style="font-weight: bold;">Examen parasitol&oacute;gico ovisc&oacute;pico </span>    <br>       <br>   Se&nbsp; aplic&oacute;,&nbsp; una&nbsp; vez&nbsp; a&nbsp; primeras&nbsp; horas&nbsp; de&nbsp; la ma&ntilde;ana (alrededor 6-7 am) antes del aseo personal y&nbsp; defecaci&oacute;n,&nbsp; la&nbsp; t&eacute;cnica&nbsp; ovisc&oacute;pica&nbsp; de&nbsp; la&nbsp; cinta adhesiva transparente de Graham (Graham 1941, Botero y Restrepo 2012), como se ha descrito en trabajos previos (Acosta et al. 2002, Cazorla et al. 2006a,b, Humbr&iacute;a-Heyliger et al. 2012).    <br>   &nbsp;    <br>   <span style="font-weight: bold;">An&aacute;lisis estad&iacute;stico</span>    <br>   &nbsp;    <br>   La asociaci&oacute;n univariante entre las manifestaciones cl&iacute;nicas y los posibles factores de riesgo&nbsp; con&nbsp; la&nbsp; presencia&nbsp; de&nbsp; los&nbsp; oxiuros,&nbsp; se&nbsp; hizo mediante&nbsp; las&nbsp; pruebas&nbsp; estad&iacute;sticas&nbsp; de&nbsp; Ji&nbsp; cuadrado (&chi;2) y &chi;2 de Mantel-Haenczel y la de &chi;2 de la raz&oacute;n de verosimilitud, respectivamente. Se consider&oacute; p &le;&nbsp; 0,05&nbsp; como&nbsp; nivel&nbsp; de&nbsp; significaci&oacute;n.&nbsp; En&nbsp; aquellos casos&nbsp; donde&nbsp; se&nbsp; encontr&oacute;&nbsp; una&nbsp; asociaci&oacute;n significativa en el an&aacute;lisis univariado, la fuerza se determin&oacute;&nbsp; mediante&nbsp; los&nbsp; Odds&nbsp; Ratio&nbsp; (OR)&nbsp; o productos&nbsp; de&nbsp; la&nbsp; raz&oacute;n&nbsp; cruzada&nbsp; o&nbsp; de&nbsp; momios. Mientras&nbsp; mayor&nbsp; sea&nbsp; un&nbsp; OR&nbsp; indicar&aacute;&nbsp; un&nbsp; riesgo elevado&nbsp; (&ge;&nbsp; 1).&nbsp; En&nbsp; lo&nbsp; referente&nbsp; a&nbsp; las manifestaciones&nbsp; cl&iacute;nicas,&nbsp; los&nbsp; OR&nbsp; se&nbsp; obtuvieron por las tablas de contingencia (an&aacute;lisis bivariante simple), y para los factores de riesgo por an&aacute;lisis de regresi&oacute;n log&iacute;stica m&uacute;ltiple (ARLM) utiliz&aacute;ndose&nbsp; como&nbsp; m&eacute;todo&nbsp; de&nbsp; estimaci&oacute;n&nbsp; de par&aacute;metros&nbsp; el&nbsp; de&nbsp; M&aacute;xima&nbsp; Verosimilitud,&nbsp; y calcul&aacute;ndose su bondad de ajuste con la prueba de Hosmer-Lemeshow,&nbsp; a&nbsp; fin&nbsp; de&nbsp; poder&nbsp; controlar&nbsp; las variables&nbsp; de&nbsp; confusi&oacute;n&nbsp; (confounding&nbsp; variables). Los&nbsp; datos&nbsp; se&nbsp; analizaron&nbsp; mediante&nbsp; paquete estad&iacute;stico&nbsp; SIGMAPLOT&nbsp; versi&oacute;n&nbsp; 12.5&nbsp; (Systat Software&nbsp; Inc.),&nbsp; y&nbsp; p&aacute;gina&nbsp; Web&nbsp; para&nbsp; c&aacute;lculos estad&iacute;sticos Simple Interactive Statistical Analysis (SISA).    <br>       <br>   <span style="font-weight: bold;">RESULTADOS</span>    <br>   &nbsp;    ]]></body>
<body><![CDATA[<br>   Del&nbsp; total&nbsp; de&nbsp; 82&nbsp; ni&ntilde;os&nbsp; examinados,&nbsp; se encontraron&nbsp; parasitados&nbsp; con&nbsp; E.&nbsp; vermicularis&nbsp;&nbsp;&nbsp; 33 (Fig.&nbsp; 2)&nbsp; para&nbsp; una&nbsp; prevalencia&nbsp; de&nbsp; la&nbsp; infecci&oacute;n&nbsp; de 40,2%;&nbsp; de&nbsp; &eacute;stos,&nbsp; 7&nbsp; (21,2%)&nbsp; correspondieron&nbsp; al sexo&nbsp; femenino&nbsp; y&nbsp; 26&nbsp; (78,8%)&nbsp; al&nbsp; masculino,&nbsp; para una&nbsp; diferencia&nbsp; significativa&nbsp; en&nbsp; relaci&oacute;n&nbsp; con&nbsp; el g&eacute;nero [&chi;2 = 10,2; p = 0,001], resultados &eacute;stos que se&nbsp; muestran&nbsp; en&nbsp; la&nbsp; Tabla&nbsp; 1.&nbsp; En&nbsp; lo&nbsp; referente&nbsp; a&nbsp; los grupos&nbsp; etarios,&nbsp; los&nbsp; ni&ntilde;os&nbsp; en&nbsp; edad&nbsp; escolar presentaron los mayores porcentajes de infecci&oacute;n por E. vermicularis (72,7 vs. 27,3%), sin embargo estas&nbsp; diferencias&nbsp; no&nbsp; fueron&nbsp; estad&iacute;sticamente significativas (&chi;2 = 14,8; p = 0,19) (Tabla 1).    <br>   &nbsp;    <br>   En&nbsp; la&nbsp; Tabla&nbsp; 2,&nbsp; se&nbsp; muestran&nbsp; los&nbsp; signos&nbsp; y s&iacute;ntomas.&nbsp; El&nbsp; prurito&nbsp; anal&nbsp; se&nbsp; present&oacute;&nbsp; en&nbsp; 22 (66,67%) de los ni&ntilde;os parasitados y 15 (30, 61%) de los no parasitados (&chi;2 = 10,32; OR = 3,6; p = 0,001);&nbsp; la&nbsp; intranquilidad&nbsp; se&nbsp; detect&oacute;&nbsp; en&nbsp; 15 (45,46%) de los ni&ntilde;os parasitados y 7 (14,29%) de los no parasitados (&chi;2 = 9,6; OR = 5; p = 0,001); mientras&nbsp; que&nbsp; el&nbsp; bruxismo&nbsp; se&nbsp; present&oacute;&nbsp; en&nbsp; 20 (60,61%) de los ni&ntilde;os parasitados y 10 (20,41%) de&nbsp; los&nbsp; no&nbsp; parasitados&nbsp; (&chi;2&nbsp; =&nbsp; 13,6;&nbsp; OR&nbsp; =&nbsp; 6;&nbsp; p&nbsp; = 0,001), y el dolor abdominal en 8 (24,24%) de los ni&ntilde;os parasitados y 3 (6,12%) delos no parasitados (&chi;2&nbsp;= 5,5; OR = 4,9; p = 0,001) (Tabla 2). Dentro de&nbsp; los&nbsp; h&aacute;bitos&nbsp; de&nbsp; higiene&nbsp; personal&nbsp; y&nbsp; familiar (Tablas&nbsp; 3&nbsp; y&nbsp; 4)&nbsp; se&nbsp; encontraron&nbsp; significativamente asociados a oxiuriasis, la onicofagia (&chi;2 = 4,6; p = 0,03), u&ntilde;as sucias (&chi;2 = 16,8; p = 0,001), jugar con mascotas (&chi;2 = 5,2; p = 0,02), no lavar las manos antes (&chi;2 = 22,0; p = 0,000) y despu&eacute;s (&chi;2 = 5,5; p =&nbsp; 0,02)&nbsp; de&nbsp; comer&nbsp; y&nbsp; al&nbsp; defecar&nbsp; (&chi;2&nbsp; =&nbsp; 10,4;&nbsp; p&nbsp; = 0,001), colgar la ropas juntas (&chi;2 = 6,8; p = 0,01), defecar&nbsp; en&nbsp; pozo&nbsp; s&eacute;ptico&nbsp; (&chi;2&nbsp; =&nbsp; 5,6;&nbsp; p&nbsp; =&nbsp; 0,02),recolectar la basura en bolsas pl&aacute;sticas (&chi;2 = 13,9; p = 0,000), el hacinamiento (&ge; 6 personas/casa: &chi;2 =&nbsp; 30,4;&nbsp; p&nbsp; =&nbsp; 0,000); &ge;&nbsp; 3personas/habitaci&oacute;n:&nbsp; &chi;2&nbsp; = 5,2; p = 0,02); y en lo referente a las condiciones socio-econ&oacute;micas&nbsp; (Graffar),&nbsp; pertenecer&nbsp; a&nbsp; un n&uacute;cleo&nbsp; familiar&nbsp; con&nbsp; un&nbsp; bajo&nbsp; nivel&nbsp; de&nbsp; pobreza relativa o cr&iacute;tica (&chi;2 = 12,0; p = 0,001) (Tabla 4).    <br>   &nbsp;    <br>   Los&nbsp; Odds&nbsp; Ratio&nbsp; (OR;&nbsp; 95%&nbsp; intervalo&nbsp; de confianza) de los factores de riesgo significativamente asociados con la infecci&oacute;n por E. vermicularis, tal como lo sugieren sus OR &ge;1, fueron:&nbsp; padecer&nbsp; de&nbsp; prurito&nbsp; anal&nbsp; (OR&nbsp; =&nbsp; 3,6), practicar la onicofagia (OR = 2,8), poseer las u&ntilde;as sucias (OR = 6,3), jugar con mascotas (OR = 2,0), defecar&nbsp; en&nbsp; pozo&nbsp; s&eacute;ptico&nbsp; (OR&nbsp; =&nbsp; 2,3)&nbsp; y&nbsp; vivir&nbsp; en hacinamiento (&ge; 6 personas/casa: OR = 19,8; &ge; 3 personas/habitaci&oacute;n: OR = 1,8) (Tabla 5).    <br>   &nbsp;    <br>   De&nbsp; acuerdo&nbsp; a&nbsp; la&nbsp; prueba&nbsp; de&nbsp; Hosmer&nbsp; y Lemeshow, se obtuvieron valores no significativos (&chi;2 = 3,03, p = 0,8917), con lo cual se&nbsp; considera&nbsp; que&nbsp; el&nbsp; modelo&nbsp; cuenta&nbsp; con&nbsp; buen ajuste.    <br>   &nbsp;    <br>   </font>     <div style="text-align: center;"><font size="-1"><span style="font-weight: bold;">Tabla&nbsp; 1.</span>&nbsp; Prevalencia&nbsp; de&nbsp; enterobiasis&nbsp; por&nbsp; grupos&nbsp; de&nbsp; edades&nbsp; y&nbsp; sexo,&nbsp; en&nbsp; ni&ntilde;os&nbsp; de&nbsp; El&nbsp; Paso&nbsp; de&nbsp; Acurigua,&nbsp; estado&nbsp; Falc&oacute;n,Venezuela.    ]]></body>
<body><![CDATA[<br>  <img style="width: 626px; height: 143px;" alt="" src="/img/fbpe/saber/v28n4/art10fig2.jpg">    
<br>  </font><font size="-1"> </font>    <br>  <font size="-1"> <span style="font-weight: bold;">Tabla 2.</span> Manifestaciones cl&iacute;nicas asociadas con enterobiasis en ni&ntilde;os de El Paso de Acurigua, estado Falc&oacute;n, Venezuela.    <br>  <img style="width: 743px; height: 315px;" alt="" src="/img/fbpe/saber/v28n4/art10fig3.jpg">    
<br>  </font><font size="-1"> </font>    <br>  <font size="-1"> <span style="font-weight: bold;">Tabla 3.</span> H&aacute;bitos de higiene personal y familiar y su asociaci&oacute;n con enterobiasis en ni&ntilde;os de El Paso de Acurigua, estado Falc&oacute;n, Venezuela.    <br>  <img style="width: 735px; height: 1107px;" alt="" src="/img/fbpe/saber/v28n4/art10fig4.jpg">    
<br>  </font></div>  <font size="-1">     <br>   <span style="font-weight: bold;">Tabla 4. </span>H&aacute;bitos de higiene personal y familiar y condici&oacute;n socio-econ&oacute;mica (Graffar) y su asociaci&oacute;n con enterobiasis en ni&ntilde;os de El Paso de Acurigua, estado Falc&oacute;n, Venezuela.    <br>  </font>     ]]></body>
<body><![CDATA[<div style="text-align: center;"><img style="width: 755px; height: 398px;" alt="" src="/img/fbpe/saber/v28n4/art10fig5.jpg">    
<br>  </div>  <font size="-1">     <br>   <span style="font-weight: bold;">Tabla&nbsp;5.</span>&nbsp; Odds&nbsp; Ratios&nbsp; (OR)&nbsp; obtenidos&nbsp; del&nbsp; an&aacute;lisis&nbsp; de&nbsp; regresi&oacute;n&nbsp; log&iacute;stica&nbsp; m&uacute;ltiple&nbsp; (ARLM)&nbsp; para&nbsp; factores&nbsp; de&nbsp; riesgo potencialmente asociados a enterobiasis en ni&ntilde;os de El Paso de Acurigua, estado Falc&oacute;n, Venezuela.    <br>  </font>     <div style="text-align: center;"><img style="width: 601px; height: 336px;" alt="" src="/img/fbpe/saber/v28n4/art10fig6.jpg">    
<br>  </div>  <font size="-1">     <br>   </font>     <div style="text-align: center;"><font size="-1"><span style="font-weight: bold;">Figura&nbsp; 2.</span>&nbsp; Huevos&nbsp; de&nbsp; Enterobius vermicularis&nbsp; sobre&nbsp; la superficie de cinta adhesiva. A: 50X; B: 100X; C: 400X.    <br>  <img style="width: 195px; height: 273px;" alt="" src="/img/fbpe/saber/v28n4/art10fig7.jpg"></font>    
<br>  </div>  <font size="-1"> <span style="font-weight: bold;">DISCUSI&Oacute;N</span>    ]]></body>
<body><![CDATA[<br>   &nbsp;    <br>   A pesar de su ubicuidad, las tasas de infecci&oacute;n por&nbsp; E.&nbsp; vermicularis&nbsp; pueden&nbsp; variar&nbsp; de&nbsp; regi&oacute;n&nbsp; en regi&oacute;n y dentro de un mismo pa&iacute;s, dependiendo de varios factores como los de tipo clim&aacute;tico, socio-econ&oacute;micos, demogr&aacute;ficos, culturales e inclusive del&nbsp; m&eacute;todo&nbsp; de&nbsp; diagn&oacute;stico&nbsp; (De&#285;erli&nbsp; et&nbsp; al.&nbsp; 2009 Maniscalchi et al. 2010, Botero y Restrepo 2012). En&nbsp; este&nbsp; sentido,&nbsp; la&nbsp; prevalencia&nbsp; de&nbsp; 40,2% encontrada&nbsp; en&nbsp; ni&ntilde;os&nbsp; matriculados&nbsp; en&nbsp; la&nbsp; Escuela Bolivariana&nbsp; de&nbsp; El&nbsp; Paso&nbsp; de&nbsp; Acarigua,&nbsp; estado Falc&oacute;n, Venezuela, es comparativamente mayor o menor que las detectadas en estudios realizados en otros&nbsp; estados&nbsp; del&nbsp; pa&iacute;s,&nbsp; incluyendo&nbsp; Trujillo (46,5%)&nbsp; (Oropesa&nbsp; et&nbsp; al.&nbsp; 2010);&nbsp; M&eacute;rida&nbsp; (4,8&nbsp; y 24,7%)&nbsp; (Scorza&nbsp; et&nbsp; al.&nbsp; 1974);&nbsp; Zulia&nbsp; (8,6&nbsp; y&nbsp; 55%) (Romero de Olaria 1979, P&aacute;ez de Mourad y Calchi 1994,&nbsp; Simoes&nbsp; et&nbsp; al.&nbsp; 2000,&nbsp; Rivero&nbsp; et&nbsp; al.&nbsp; 2001); Bol&iacute;var&nbsp; (4,7-45,8%)&nbsp; (Devera&nbsp; et&nbsp; al.&nbsp; 1998, Requena-Certad et al. 2002, Requena et al. 2007, Ca&ntilde;as&nbsp; et&nbsp; al.&nbsp; 2013);&nbsp; Anzo&aacute;tegui&nbsp; (11,2-49%) (Greatty&nbsp; et&nbsp; al.&nbsp; 1994,&nbsp; Gonz&aacute;lez&nbsp; et&nbsp; al.&nbsp; 1995, Maniscalchi et al. 2010, Mart&iacute;nez y Batista 2011); Lara (17,7-39,1%) (P&eacute;rez et al. 2011, Cervantes et al.&nbsp; 2012);&nbsp; Miranda&nbsp; (19,2%)&nbsp; (Arencibia&nbsp; et&nbsp; al. 2013). Esta cifra de 40,2% se encuentra dentro del rango&nbsp; encontrado&nbsp; en&nbsp; la&nbsp; regi&oacute;n&nbsp; falconiana&nbsp; (23-57,8%) (Acosta et al. 2002, Cazorla et al. 2006a,b, Humbr&iacute;a-Heyliger et al. 2012), confirmando una vez m&aacute;s que esta entero-helmintiasis es altamente prevalente&nbsp; en&nbsp; preescolares&nbsp; y&nbsp; escolares&nbsp; de&nbsp; la entidad, especialmente en su &aacute;rea rural.    <br>   &nbsp;    <br>   A diferencia de los hallazgos hechos en otras &aacute;reas&nbsp; de&nbsp; Venezuela&nbsp; (e.g.,&nbsp; Devera&nbsp; et&nbsp; al.&nbsp; 1998, Maniscalchi&nbsp; et&nbsp; al.&nbsp; 2010,&nbsp; Requena-Certad&nbsp; et&nbsp; al. 2002, Requena&nbsp; et al. 2007) y particularmente de la zona semi&aacute;rida del estado Falc&oacute;n (Acosta et al. 2002, Cazorla et al. 2006a,b, Humbr&iacute;a-Heyliger et al.&nbsp; 2012),&nbsp; en&nbsp; los&nbsp; preescolares&nbsp; y&nbsp; escolares&nbsp; del presente&nbsp; estudio,&nbsp; se&nbsp; determin&oacute;&nbsp; que&nbsp; los&nbsp; varones exhibieron prevalencias de oxiuriasis significativamente&nbsp; mayores&nbsp; que&nbsp; las&nbsp; de&nbsp; sus contrapartes&nbsp; del&nbsp; sexo&nbsp; femenino.&nbsp; Como&nbsp; posible explicaci&oacute;n a estas diferencias, se ha indicado que las&nbsp; ni&ntilde;as&nbsp; adquieren&nbsp; h&aacute;bitos&nbsp; de&nbsp; higiene&nbsp; m&aacute;s temprano,&nbsp; adem&aacute;s&nbsp; de&nbsp; que&nbsp; los&nbsp; varones&nbsp; son&nbsp; m&aacute;s hiperactivos (Requena-Certad et al. 2002, Lee et al. 2011). En relaci&oacute;n con los grupos de edades, no&nbsp; se&nbsp; encontr&oacute;&nbsp; una&nbsp; asociaci&oacute;n&nbsp; estad&iacute;sticamente significativa entre esta variable y la infecci&oacute;n por E.&nbsp; vermicularis,&nbsp; lo&nbsp; que&nbsp; sugiere&nbsp; que&nbsp; todos&nbsp; los individuos&nbsp; se&nbsp; encuentran&nbsp; expuestos&nbsp; en&nbsp; similares condiciones&nbsp; de&nbsp; riesgo;&nbsp; esto&nbsp; coincide&nbsp; con&nbsp; varios estudios&nbsp; hechos&nbsp; en&nbsp; otras&nbsp; regiones&nbsp; de&nbsp; Venezuela (e.g.,&nbsp; Devera&nbsp; et&nbsp; al.&nbsp; 1998,&nbsp; Requena-Certad&nbsp; et&nbsp; al. 2002,&nbsp; Requena&nbsp; et&nbsp; al.&nbsp; 2007,&nbsp; Maniscalchi&nbsp; et&nbsp; al. 2010,),&nbsp; y&nbsp; el&nbsp; estado&nbsp; Falc&oacute;n&nbsp; (Acosta&nbsp; et&nbsp; al.&nbsp; 2002, Cazorla&nbsp; et&nbsp; al.&nbsp; 2006a,b,&nbsp; Humbr&iacute;a-Heyliger&nbsp; et&nbsp; al. 2012). Sin embargo, es necesario acotar que otros investigadores&nbsp; han&nbsp; observado&nbsp; tasas&nbsp; de&nbsp; infecci&oacute;n significativamente&nbsp; mayores&nbsp; en&nbsp; ni&ntilde;os&nbsp; en&nbsp; edad escolar, considerando que los preescolares reciben cuidados&nbsp; especiales&nbsp; de&nbsp; sus&nbsp; cuidadores,&nbsp; y&nbsp; se encuentran&nbsp; confinados&nbsp; en&nbsp; las&nbsp; aulas&nbsp; de&nbsp; clase durante&nbsp; las&nbsp; actividades&nbsp; de&nbsp; recreo&nbsp; y&nbsp; merienda (Norhayati et al. 1994, Song et al. 2003).    <br>   &nbsp;    <br>   La&nbsp; mayor&iacute;a de los investigadores concuerdan en&nbsp; que&nbsp; el&nbsp; prurito&nbsp; anal&nbsp; es&nbsp; el&nbsp; s&iacute;ntoma&nbsp; m&aacute;s com&uacute;nmente relacionado con la presencia de los oxiuros&nbsp; (Gilman&nbsp; et&nbsp; al.&nbsp; 1991,&nbsp; Botero&nbsp; y&nbsp; Restrepo 2012, Zhao et al. 2013, Cazorla-Perfetti 2014), tal como&nbsp; se&nbsp; detect&oacute;&nbsp; en&nbsp; los&nbsp; ni&ntilde;os&nbsp; estudiados&nbsp; (OR&nbsp; = 3,6),&nbsp; as&iacute;&nbsp; como&nbsp; tambi&eacute;n&nbsp; en&nbsp; estudios&nbsp; similares hechos en la regi&oacute;n falconiana (Acosta et al. 2002, Cazorla&nbsp; et&nbsp; al.&nbsp; 2006a,b,&nbsp; Humbr&iacute;a-Heyliger&nbsp; et&nbsp; al. 2012).&nbsp; &Eacute;ste&nbsp; se&nbsp; origina,&nbsp; especialmente&nbsp; en&nbsp; horas nocturnas, cuando la hembra del entero-helminto sale por el ano y al arrastrarse libera una sustancia pegajosa que ocasiona la alergia local (Cook 1994, Gilman et al. 1991, Botero y Restrepo 2012). Este rascado&nbsp; durante&nbsp; las&nbsp; horas&nbsp; de&nbsp; pernocta,&nbsp; perjudica las&nbsp; actividades&nbsp; de&nbsp; aprendizaje&nbsp; de&nbsp; los&nbsp; ni&ntilde;os&nbsp; en&nbsp; la escuela,&nbsp; debido&nbsp; a&nbsp; que&nbsp; el&nbsp; insomnio&nbsp; con intranquilidad&nbsp; los&nbsp; estresan&nbsp; y&nbsp; les&nbsp; disminuye&nbsp; su capacidad de atenci&oacute;n (Botero y Restrepo 2012), como en los preescolares y escolares del presente estudio (OR = 5). Adem&aacute;s, debe tenerse en cuenta de&nbsp; que&nbsp; la&nbsp; &ldquo;verg&uuml;enza&nbsp; de&nbsp; tener&nbsp; gusanos&rdquo;&nbsp; puede influir en la salud mental de los ni&ntilde;os (Chang&nbsp; et al.&nbsp; 2009).&nbsp; Contrastando&nbsp; con&nbsp; otros&nbsp; trabajos realizados&nbsp; en&nbsp; la&nbsp; zona&nbsp; semi&aacute;rida&nbsp; falconiana (Cazorla&nbsp; et&nbsp; al.&nbsp; 2006a,b,&nbsp; Humbr&iacute;a-Heyliger&nbsp; et&nbsp; al. 2012),&nbsp; el&nbsp; bruxismo&nbsp; (OR&nbsp; =&nbsp; 6)&nbsp; fue&nbsp; otro&nbsp; de&nbsp; los s&iacute;ntomas&nbsp; de&nbsp; la&nbsp; alteraci&oacute;n&nbsp; del&nbsp; comportamiento significativamente&nbsp; asociado&nbsp; con&nbsp; la&nbsp; infecci&oacute;n&nbsp; por E.&nbsp; vermicularis&nbsp; en&nbsp; los&nbsp; ni&ntilde;os&nbsp; de&nbsp; El&nbsp; Paso&nbsp; de Acurigua, estado Falc&oacute;n, Venezuela. Tal como se observ&oacute;&nbsp; en&nbsp; el&nbsp; presente&nbsp; trabajo&nbsp; (OR&nbsp; =&nbsp; 4,9),&nbsp; los oxiuros&nbsp; se&nbsp; encuentran&nbsp; entre&nbsp; otro&nbsp; de&nbsp; los&nbsp; posibles agentes de origen parasitario que ocasionan dolor abdominal&nbsp; en&nbsp; los&nbsp; humanos&nbsp; (Botero&nbsp; y&nbsp; Restrepo 2012, Giorgio et al. 2012, Thomassen et al. 2012, Yazgan et al. 2015). No obstante lo discutido, es necesario&nbsp; que&nbsp; se&nbsp; realicen&nbsp; estudio&nbsp; cl&iacute;nicos&nbsp; m&aacute;s controlados y aleatorizados, especialmente los de tipo caso-control, para determinar m&aacute;s fehacientemente la relaci&oacute;n causa-efecto entre los oxiuros&nbsp; y&nbsp; las&nbsp; manifestaciones&nbsp; cl&iacute;nicas&nbsp; que potencialmente&nbsp; ocasionan&nbsp; (Gilman&nbsp; et&nbsp; al.&nbsp; 1991, Rodr&iacute;guez-Morales 2009); esto debido a que no se analiz&oacute; la presencia de otros par&aacute;sitos intestinales y de que muchas de estas manifestaciones cl&iacute;nicas no son patognom&oacute;nicas de las infecciones por E. vermicularis.    <br>   &nbsp;    <br>   El&nbsp; &eacute;xito&nbsp; de&nbsp; E.&nbsp; vermicularis&nbsp; para&nbsp; diseminarse dentro&nbsp; de&nbsp; las&nbsp; poblaciones&nbsp; humanas,&nbsp; depende&nbsp; en gran&nbsp; medida&nbsp; de&nbsp; su&nbsp; capacidad&nbsp; de&nbsp; poseer&nbsp; hasta cuatro mecanismos de transmisi&oacute;n, siendo el m&aacute;s com&uacute;n&nbsp; y&nbsp; ampliamente&nbsp; reconocido&nbsp; el&nbsp; de&nbsp; &ldquo;mano-ano-boca&rdquo; (Cook 1994, Hugot et al. 1999, Botero y Restrepo 2012). El hecho de haberse encontrado que el prurito anal (OR = 3,6) y la onicofagia (OR = 2,8) con u&ntilde;as sucias (OR = 6,3) se presentaron en&nbsp; los&nbsp; ni&ntilde;os&nbsp; de&nbsp; El&nbsp; Paso&nbsp; de&nbsp; Acurigua,&nbsp; estado Falc&oacute;n,&nbsp; Venezuela,&nbsp; significativamente&nbsp; asociados a la presencia de E. vermicularis y en una elevada frecuencia,&nbsp; conduce&nbsp; a&nbsp; sugerir&nbsp; que&nbsp; la&nbsp; v&iacute;a&nbsp;&nbsp;&nbsp; oral &ldquo;mano-ano-boca&rdquo;&nbsp; debe&nbsp; estar&nbsp; jugando&nbsp; un&nbsp; papel importante&nbsp; en&nbsp; la&nbsp; diseminaci&oacute;n&nbsp; de&nbsp; los&nbsp; huevos&nbsp; del entero-helminto&nbsp; en&nbsp; la&nbsp; zona.&nbsp; La&nbsp; denominada &ldquo;diseminaci&oacute;n&nbsp; aerosol&rdquo;&nbsp; tambi&eacute;n&nbsp; se&nbsp; encuentra dentro de los mecanismos que utilizan los oxiuros     <br>       <br>   para trasmitirse, la cual consiste en aprovechar la facilidad&nbsp; de&nbsp; flotaci&oacute;n&nbsp; de&nbsp; los&nbsp; huevos&nbsp; cuando&nbsp; son esparcidos&nbsp; por&nbsp; el&nbsp; viento,&nbsp; pudiendo&nbsp; contaminar todo&nbsp; tipo&nbsp; de&nbsp; superficies&nbsp; (fomites)&nbsp; (e.g.,&nbsp; enseres, alimentos,&nbsp; agua)&nbsp; (Hugot&nbsp; et&nbsp; al.&nbsp; 1999).&nbsp; Esta caracter&iacute;stica ayuda a explicar la asociaci&oacute;n entre la presencia de oxiuros y el &ldquo;jugar con mascotas&rdquo; (OR = 2), pudiendo de esta manera entrar por v&iacute;a oral&nbsp; los&nbsp; huevos&nbsp; del&nbsp; par&aacute;sito,&nbsp; que&nbsp; potencialmente se&nbsp; encuentran&nbsp; en&nbsp; el&nbsp; pelo&nbsp; de&nbsp; sus&nbsp; mascotas&nbsp; (e.g., perros, gatos) (Hugot et al. 1999, Tavassoli et al. 2012), cuando los ni&ntilde;os se llevan de una manera deliberada o no las manos a la boca.    ]]></body>
<body><![CDATA[<br>   &nbsp;    <br>   El&nbsp; hacinamiento&nbsp; se&nbsp; encuentra&nbsp; dentro&nbsp; de&nbsp; los factores&nbsp; m&aacute;s&nbsp; importantes&nbsp; que&nbsp; contribuyen&nbsp; en&nbsp; la diseminaci&oacute;n&nbsp; intradomiciliar&nbsp; persona-persona&nbsp; de los&nbsp; oxiuros,&nbsp; cuyos&nbsp; huevos&nbsp; no&nbsp; necesitan,&nbsp; a diferencia de la mayor&iacute;a de los geohelmintos, de las&nbsp; condiciones&nbsp; microambientales&nbsp; para&nbsp; su desarrollo (Requena et al. 2002, Wang et al. 2009, Botero&nbsp; y&nbsp; Restrepo&nbsp; 2012,&nbsp; Cazorla-Perfetti&nbsp; 2014). Esta afirmaci&oacute;n se ha demostrado fehacientemente&nbsp; en&nbsp; los&nbsp; estudios&nbsp; hechos&nbsp; en&nbsp; el semi&aacute;rido falconiano (Acosta et al. 2002, Cazorla et al. 2006a,b, Humbr&iacute;a-Heyliger et al. 2012), y se reafirma&nbsp; una&nbsp; vez&nbsp; m&aacute;s&nbsp; en&nbsp; los&nbsp; ni&ntilde;os&nbsp; escolarizados del&nbsp; presente&nbsp; trabajo,&nbsp; en&nbsp; donde&nbsp; se&nbsp; encontr&oacute; porcentajes de infecci&oacute;n de oxiuriasis significativamente mayores en ni&ntilde;os provenientes de&nbsp; n&uacute;cleos&nbsp; familiares&nbsp; con&nbsp; un&nbsp; elevado&nbsp; grado&nbsp; de hacinamiento (&ge; 6 personas/casa, OR = 19,8; &ge; 3 personas/habitaci&oacute;n, OR = 1,8).    <br>   &nbsp;    <br>   El&nbsp; hecho&nbsp; de&nbsp; que&nbsp; exista&nbsp; en&nbsp; la&nbsp; comunidad&nbsp; la costumbre&nbsp; de&nbsp; colgar&nbsp; la&nbsp; vestimenta&nbsp; juntas&nbsp; en&nbsp; la familia, habla a favor que esta sea otra de las v&iacute;as de&nbsp; diseminaci&oacute;n&nbsp; intradomiciliar&nbsp; persona-persona (Botero&nbsp; y&nbsp; Restrepo&nbsp; 2012,&nbsp; Cazorla-Perfetti&nbsp; et&nbsp; al. 2015),&nbsp; aunque&nbsp; su&nbsp; asociaci&oacute;n&nbsp; con&nbsp; el&nbsp; helminto intestinal fue d&eacute;bil (OR = 0,4).     <br>   &nbsp;    <br>   En&nbsp; algunas&nbsp; regiones&nbsp; a&nbsp; E.&nbsp; vermicularis&nbsp; se&nbsp; le denomina&nbsp; com&uacute;nmente&nbsp; como&nbsp; &ldquo;gusano&nbsp; de&nbsp; los asientos&rdquo;&nbsp; (thread&nbsp; worm),&nbsp; esto&nbsp; debido&nbsp; a&nbsp; que&nbsp; a trav&eacute;s&nbsp; de&nbsp; los&nbsp; inodoros&nbsp; contaminados&nbsp; cuando&nbsp; los individuos&nbsp; se&nbsp; sientan&nbsp; pueden&nbsp; servir&nbsp; v&iacute;a&nbsp; f&oacute;mite para la transmisi&oacute;n (Botero y Restrepo 2012). Esto ayudar&iacute;a&nbsp; a&nbsp; explicar&nbsp; el&nbsp; hallazgo&nbsp; de&nbsp; mayores porcentajes de infecci&oacute;n por oxiuros en los ni&ntilde;os de&nbsp; El&nbsp; Paso&nbsp; de&nbsp; Acurigua,&nbsp; estado&nbsp; Falc&oacute;n, Venezuela, que defecaban en pozo s&eacute;ptico (OR = 2,3), en comparaci&oacute;n con aquellos que lo hac&iacute;an a campo raso.    <br>   &nbsp;    <br>   Varios autores han encontrado una asociaci&oacute;n significativa&nbsp; entre&nbsp; el&nbsp; estrato&nbsp; socio-econ&oacute;mico familiar&nbsp; y&nbsp; la&nbsp; infecci&oacute;n&nbsp; por&nbsp; oxiuros&nbsp; (Changsap&nbsp; et al. 2002, Chang et al. 2009, Keskin y Ay Bekta&#351; 2014).&nbsp; En&nbsp; los&nbsp; estudios&nbsp; realizados&nbsp; en&nbsp; la&nbsp; regi&oacute;n falconiana,&nbsp; se&nbsp; ha&nbsp; detectado&nbsp; una&nbsp; relaci&oacute;n&nbsp; directa entre&nbsp; el&nbsp; entero-nematodo&nbsp; y&nbsp; el&nbsp; bajo&nbsp; grado&nbsp; de instrucci&oacute;n&nbsp; de&nbsp; las&nbsp; madres,&nbsp; como&nbsp; variable&nbsp; socio-econ&oacute;mica&nbsp; (Cazorla&nbsp; et&nbsp; al.&nbsp; 2006a),&nbsp; las&nbsp; cuales necesitan de un conocimiento b&aacute;sico de educaci&oacute;n para&nbsp; la&nbsp; salud&nbsp; en&nbsp; parasitosis&nbsp; intestinales&nbsp; y particularmente&nbsp; en&nbsp; enterobiasis,&nbsp; para&nbsp; reducir&nbsp; las tasas&nbsp; de&nbsp; infecci&oacute;n&nbsp; (Kang&nbsp; et&nbsp; al.&nbsp; 2012,&nbsp; Kim&nbsp; y&nbsp; Yu 2014). La mayor&iacute;a de los preescolares y escolares de&nbsp; El&nbsp; Paso&nbsp; de&nbsp; Acurigua,&nbsp; estado&nbsp; Falc&oacute;n, Venezuela,&nbsp; proven&iacute;an&nbsp; de&nbsp; hogares&nbsp; con&nbsp; grado&nbsp; alto de&nbsp; pobreza&nbsp; relativa&nbsp; y&nbsp; cr&iacute;tica;&nbsp; sin&nbsp; embargo,&nbsp; esta caracter&iacute;stica no se encontr&oacute; fuertemente asociada a&nbsp; la&nbsp; presencia&nbsp; de&nbsp; los&nbsp; oxiuros&nbsp; (OR&nbsp; =&nbsp; 0,3).&nbsp; Sin embargo, el hecho de presentarse en la comunidad tasas de prevalencia de enterobiasis &gt; 40%, es por s&iacute;&nbsp; solo&nbsp; un&nbsp; indicativo&nbsp; de&nbsp; serios&nbsp; problemas&nbsp; de higiene comunitaria y familiar, insalubridad y los de tipo socio-econ&oacute;mico (Botero y Retrepo 2012).    <br>   &nbsp;    <br>   <span style="font-weight: bold;">CONCLUSIONES</span>    ]]></body>
<body><![CDATA[<br>   &nbsp;    <br>   La&nbsp; enterobiasis&nbsp; es&nbsp; altamente&nbsp; prevalente (40,2%) en los ni&ntilde;os escolarizados de El Paso de Acurigua&nbsp; de&nbsp; la&nbsp; sierra&nbsp; falconiana.&nbsp; Los&nbsp; deficientes h&aacute;bitos de higiene personal&nbsp; y condiciones socio-econ&oacute;micos&nbsp; limitadas&nbsp; contribuyen&nbsp; con&nbsp; la transmisi&oacute;n&nbsp; y&nbsp; mantenimiento&nbsp; end&eacute;mico&nbsp; de&nbsp; E. vermicularis.    <br>   &nbsp;    <br>   <span style="font-weight: bold;">AGRADECIMIENTOS</span>    <br>   &nbsp;    <br>   Comunidad&nbsp; y&nbsp; Autoridades&nbsp; educativas&nbsp; y sanitarias&nbsp; de&nbsp; El&nbsp; Paso&nbsp; Acurigua,&nbsp; estado&nbsp; Falc&oacute;n, Venezuela.    <br>   &nbsp;    <br>   <span style="font-weight: bold;">REFERENCIAS BIBLIOGR&Aacute;FICAS</span>    <br>   &nbsp;    <br>   1.ACOSTA M, CAZORLA D, GARVETT M.&nbsp; 2002. Enterobiasis&nbsp; en&nbsp; escolares&nbsp; de&nbsp; una&nbsp; poblaci&oacute;n rural&nbsp; del&nbsp; estado&nbsp; Falc&oacute;n,&nbsp; Venezuela&nbsp; y&nbsp; su relaci&oacute;n&nbsp; con&nbsp; el&nbsp; nivel&nbsp; socio-econ&oacute;mico. Invest. Cl&iacute;n. 43(3):173-181.    ]]></body>
<body><![CDATA[<!-- ref --><br>   &nbsp;    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=3290114&pid=S1315-0162201600040001000001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><br>   2.ARENCIBIA H, LOBAINA J, TER&Aacute;N C, LEGR&Aacute; R, ARENCIBIA A.&nbsp; 2013.&nbsp; Parasitismo&nbsp; intestinal en&nbsp; una&nbsp; poblaci&oacute;n&nbsp; infantil&nbsp; venezolana. Medisan. 17(5):742-748.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=3290115&pid=S1315-0162201600040001000002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><br>   &nbsp;    <br>   3.BEN&Iacute;TEZ M, AMOR&Oacute;S C.&nbsp; 2011.&nbsp; Vitaminas&nbsp; y oligoelementos. Pediatr. 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