<?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>0120-4157</journal-id>
<journal-title><![CDATA[Biomédica]]></journal-title>
<abbrev-journal-title><![CDATA[Biomédica]]></abbrev-journal-title>
<issn>0120-4157</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-41572009000400018</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Baja prevalencia de la infección por el virus de la hepatitis C en una población de reclusos, Maracaibo, Venezuela]]></article-title>
<article-title xml:lang="en"><![CDATA[Low prevalence of hepatitis C virus infection in a prisoner population from Maracaibo, Venezuela]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Monsalve-Castillo]]></surname>
<given-names><![CDATA[Francisca]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chacín-Bonilla]]></surname>
<given-names><![CDATA[Leonor]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Atencio]]></surname>
<given-names><![CDATA[Ricardo José]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Porto]]></surname>
<given-names><![CDATA[Leticia Denys]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Costa-León]]></surname>
<given-names><![CDATA[Luciana Ana]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estévez]]></surname>
<given-names><![CDATA[Jesús Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Callejas-Valero]]></surname>
<given-names><![CDATA[Diana Estela]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad del Zulia Facultad de Medicina Escuela de Bioanálisis]]></institution>
<addr-line><![CDATA[Maracaibo Estado Zulia]]></addr-line>
<country>Venezuela</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad del Zulia Facultad de Medicina Instituto de Investigaciones Clínicas]]></institution>
<addr-line><![CDATA[Maracaibo Estado Zulia]]></addr-line>
<country>Venezuela</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad del Zulia Facultad de Medicina Laboratorio Regional de Referencia Virológica]]></institution>
<addr-line><![CDATA[Maracaibo Estado Zulia]]></addr-line>
<country>Venezuela</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Universidad del Zulia Facultad de Medicina Instituto de Investigaciones Clínicas]]></institution>
<addr-line><![CDATA[Maracaibo Estado Zulia]]></addr-line>
<country>Venezuela</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2009</year>
</pub-date>
<volume>29</volume>
<numero>4</numero>
<fpage>647</fpage>
<lpage>652</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-41572009000400018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-41572009000400018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-41572009000400018&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Introducción. Las conductas de alto riesgo presentes en los centros de reclusión incrementan la probabilidad de transmisión de la infección por el virus de la hepatitis C. En Venezuela no se han realizado estudios del virus en estos centros, por lo que se desconoce la relevancia de la infección en ellos. Objetivo. Estimar la prevalencia del virus de la hepatitis C y los posibles factores de riesgos involucrados en la transmisión del virus en reclusos de la cárcel de Sabaneta, Maracaibo, Venezuela. Material y métodos. Se seleccionó una población de 200 reclusos de un total de 1.000. Las edades estaban comprendidas entre 18 y 69 años (media ± DE: 31,629,93 años). La detección de anticuerpos contra el virus de la hepatitis C se realizó por duplicado mediante el método inmunoenzimático ELISA de IV generación y por el método de inmunoblot INNO-LIA HCV®, ambos de Innogenetic Lab (Bélgica). El ARN viral se detectó por la técnica de reacción en cadena de la polimerasa, previa transcripción inversa, RT-PCR. Resultados. La frecuencia obtenida con el método ELISA fue de 5% (10/20) y 3/200 (1,5%) individuos fueron positivos, a la vez, con los métodos de INNO-LIA y RT-PCR. Conclusiones. La prevalencia de la infección por el virus de la hepatitis C en esta población fue baja, lo que evidencia la baja circulación del virus en el reclusorio. El principal factor de riesgo para la adquisición de la infección, al parecer, es el uso de drogas intravenosas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Introduction. The high risk behaviors observed in prison centers have favored the transmission of hepatitis C virus infection. The main risk factor to acquire hepatitis C virus infection seems to be the use of intravenous drugs. In Venezuela, the prevalence of the infection in these centers is unknown since studies of the hepatitis C virus there are lacking. Objective. The aim of this study was to determine the prevalence of hepatitis C virus and the risk factors involved in the transmission in prisoner populations. Material and methods. A sample of 200 prisoners was studied from Sabaneta Jail, Maracaibo, Venezuela. The ages were between 18-69 years (average ± DS: 31.6±9.9 years). Serum samples were tested by a fourth generation enzyme-linked immunosorbent assay ELISA and a confirmatory assay INNO-LIA. Both kits were from Innogenetic Laboratories N.V. (Belgium). Viral RNA was tested by the reverse transcription polymerase chain reaction technique (RT-PCR). Results. The ELISA assay determined a hepatitis C virus prevalence of 5.0% (10/200); 3/200 (1.5%) individuals were positive by both INNO-LIA and RT-PCR tests. Conclusions. The observed prevalence of hepatitis C virus antibodies in this population was very low, suggesting a low circulation of the virus in this environment and a low level of associated risk behaviors.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[hepatitis C]]></kwd>
<kwd lng="es"><![CDATA[prevalencia]]></kwd>
<kwd lng="es"><![CDATA[prisioneros]]></kwd>
<kwd lng="es"><![CDATA[Venezuela]]></kwd>
<kwd lng="en"><![CDATA[hepatitis C]]></kwd>
<kwd lng="en"><![CDATA[prevalence]]></kwd>
<kwd lng="en"><![CDATA[prisoners]]></kwd>
<kwd lng="en"><![CDATA[Venezuela]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   <font face="verdana" size="2">    <p>COMUNICACI&Oacute;N BREVE </p>      <p><font size="4">        <center>     <b>Baja prevalencia de la infecci&oacute;n por el virus de la hepatitis C      en una poblaci&oacute;n de reclusos, Maracaibo, Venezuela</b>    </center>   </font></p>     <p>        <center>     Francisca Monsalve-Castillo<sup>1</sup>, Leonor Chac&iacute;n-Bonilla<sup>2</sup>,      Ricardo Jos&eacute; Atencio<sup>3</sup>, Leticia Denys Porto3, Luciana Ana      Costa-Le&oacute;n1, Jes&uacutes Enrique Est&eacute;vez<sup>4</sup>, Diana Estela      Callejas-Valero<sup>1,3</sup>    </center> </p>     <p><sup>1</sup> C&aacute;tedra de Virolog&iacute;a, Escuela de Bioan&aacute;lisis,    Facultad de Medicina, Universidad del Zulia, Maracaibo, Estado Zulia, Venezuela</p>     <p><sup>2</sup> Postgrado de Inmunolog&iacute;a, Instituto de Investigaciones    Cl&iacute;nicas, Facultad de Medicina, Universidad del Zulia, Maracaibo, Estado    Zulia, Venezuela</p>     <p><sup>3</sup> Laboratorio Regional de Referencia Virol&oacute;gica, Facultad    de Medicina, Universidad del Zulia, Maracaibo, Estado Zulia, Venezuela</p>     <p><sup>4</sup> Instituto de Investigaciones Cl&iacute;nicas, Facultad de Medicina,    Universidad del Zulia, Maracaibo, Estado Zulia, Venezuela</p>     ]]></body>
<body><![CDATA[<p>Recibido: 18/12/08; aceptado:13/05/09</p> <hr size=1>     <p><b>Introducci&oacute;n.</b> Las conductas de alto riesgo presentes en los centros    de reclusi&oacute;n incrementan la probabilidad de transmisi&oacute;n de la    infecci&oacute;n por el virus de la hepatitis C. En Venezuela no se han realizado    estudios del virus en estos centros, por lo que se desconoce la relevancia de    la infecci&oacute;n en ellos.</p>     <p><b>Objetivo.</b> Estimar la prevalencia del virus de la hepatitis C y los posibles    factores de riesgos involucrados en la transmisi&oacute;n del virus en reclusos    de la c&aacute;rcel de Sabaneta, Maracaibo, Venezuela.</p>     <p><b>Material y m&eacute;todos.</b> Se seleccion&oacute; una poblaci&oacute;n    de 200 reclusos de un total de 1.000. Las edades estaban comprendidas entre    18 y 69 a&ntilde;os (media ± DE: 31,629,93 a&ntilde;os). La detecci&oacute;n de    anticuerpos contra el virus de la hepatitis C se realiz&oacute; por duplicado    mediante el m&eacute;todo inmunoenzim&aacute;tico ELISA de IV generaci&oacute;n    y por el m&eacute;todo de <i>inmunoblot</i> INNO-LIA HCV®, ambos de Innogenetic    Lab (B&eacute;lgica). El ARN viral se detect&oacute; por la t&eacute;cnica de    reacci&oacute;n en cadena de la polimerasa, previa transcripci&oacute;n inversa,    RT-PCR. </p>     <p><b>Resultados.</b> La frecuencia obtenida con el m&eacute;todo ELISA fue de    5% (10/20) y 3/200 (1,5%) individuos fueron positivos, a la vez, con los m&eacute;todos    de INNO-LIA y RT-PCR.</p>     <p><b>Conclusiones.</b> La prevalencia de la infecci&oacute;n por el virus de    la hepatitis C en esta poblaci&oacute;n fue baja, lo que evidencia la baja circulaci&oacute;n    del virus en el reclusorio. El principal factor de riesgo para la adquisici&oacute;n    de la infecci&oacute;n, al parecer, es el uso de drogas intravenosas.</p>     <p><b>Palabras clave:</b> hepatitis C, prevalencia, prisioneros, Venezuela.</p> <hr size=1>     <p><font size="3">    <center>     <b>Low prevalence of hepatitis C virus infection in a prisoner population      from Maracaibo, Venezuela</b>    </center></font> </p>     <p><b>Introduction.</b> The high risk behaviors observed in prison centers have    favored the transmission of hepatitis C virus infection. The main risk factor    to acquire hepatitis C virus infection seems to be the use of intravenous drugs.    In Venezuela, the prevalence of the infection in these centers is unknown since    studies of the hepatitis C virus there are lacking.</p>     ]]></body>
<body><![CDATA[<p><b>Objective.</b> The aim of this study was to determine the prevalence of    hepatitis C virus and the risk factors involved in the transmission in prisoner    populations.</p>     <p><b>Material and methods.</b> A sample of 200 prisoners was studied from Sabaneta    Jail, Maracaibo, Venezuela. The ages were between 18-69 years (average ± DS:    31.6±9.9 years). Serum samples were tested by a fourth generation enzyme-linked    immunosorbent assay ELISA and a confirmatory assay INNO-LIA. Both kits were    from Innogenetic Laboratories N.V. (Belgium). Viral RNA was tested by the reverse    transcription polymerase chain reaction technique (RT-PCR).</p>     <p><b>Results.</b> The ELISA assay determined a hepatitis C virus prevalence of    5.0% (10/200); 3/200 (1.5%) individuals were positive by both INNO-LIA and RT-PCR    tests.</p>     <p><b>Conclusions.</b> The observed prevalence of hepatitis C virus antibodies    in this population was very low, suggesting a low circulation of the virus in    this environment and a low level of associated risk behaviors.</p>     <p><b>Key words:</b> hepatitis C, prevalence, prisoners, Venezuela.</p> <hr size=1>     <p>El virus de la hepatitis C se considera el agente causal de 80% de las infecciones    cr&oacute;nicas con posible evoluci&oacute;n a una cirrosis o a un hepatocarcinoma    celular (1). Su principal v&iacute;a de transmisi&oacute;n es la parenteral,    y las poblaciones con mayor riesgo de adquirir la infecci&oacute;n son quienes    reciben m&uacuteltiples transfusiones o est&aacute;n en hemodi&aacute;lisis,    los hemof&iacute;licos y los usuarios de drogas intravenosas (2-5). Otros factores    de riesgos involucrados en su transmisi&oacute;n comprenden el uso de tatuajes,    el <i>piercing</i> (6,7) y el consumo de drogas il&iacute;citas por v&iacute;a    oral o por inhalaci&oacute;n. Macias J. <i>et al.</i> (2008) se&ntilde;alan una    alta prevalencia (12,6%) en consumidores de drogas que compart&iacute;an los    implementos de inhalaci&oacute;n para el consumo de <i>crack</i> (coca&iacute;na)    (8,9). La transmisi&oacute;n sexual como factor de riesgo es controversial,    la mayor&iacute;a de los estudios afirman que el intercambio sexual tiene poca    asociaci&oacute;n con la infecci&oacute;n por el virus de la hepatitis C; este    riesgo se incrementa con el aumento de parejas sexuales (10,11).</p>     <p>En centros penitenciarios, la mayor&iacute;a de los prisioneros presentan conductas    de alto riesgo para infecciones de transmisi&oacute;n parenteral y sexual, y    algunas de ellas propician la adquisici&oacute;n de la infecci&oacute;n por    el virus de la hepatitis C. Estudios realizados en estas poblaciones indican    que el principal factor de riesgo, es el uso de drogas intravenosas (12-17).</p>     <p>Se han observado altas prevalencias del virus de la hepatitis C en instituciones    penitenciarias de Francia (4,9%), Espa&ntilde;a (34,2% a 38,2%), Italia (38,2%    a 90%), Australia (30,2% a 42%), Irlanda ((72%), Ir&aacute;n (45,4%), Ghana    (18,7% a 19,2%), M&eacute;xico (10%), Estados Unidos (13% a 23,1%) y Canad&aacute;    (15,9% a 16,6%) (6,18-30). En Am&eacute;rica latina, los &uacutenicos datos publicados    sobre la infecci&oacute;n en reclusos provienen de Brasil, donde se han observado    prevalencias de 4,8% a 41% (13,14,31).</p>     <p>En Venezuela, se han reportado prevalencias: de 0,7% a 2,1%, en poblaciones    urbanas y rurales, respectivamente (32); y de 0% a 71%, en poblaciones de riesgo,    como trabajadoras sexuales (0%), usuarios de drogas intravenosas (1%), recipientes    de transfusiones m&uacuteltiples (24%) y pacientes en hemodi&aacute;lisis (39%    a 71%) (33-36). Schmunis <i>et al.</i> (2005) se&ntilde;alan que en Am&eacute;rica    Latina, para el a&ntilde;o 2002, en pacientes con m&uacuteltiples transfusiones,    el riesgo de recibir unidades infectadas se ubica entre 0 y 16,14 por 10.000    donantes, correspondiendo el m&aacute;s bajo a Venezuela y el m&aacute;s alto    a Bolivia (37). En donantes, para los a&ntilde;os 1993-1996, la prevalencia en    Venezuela se ubicaba en 0,6% a 0,7% (38,39). Actualmente, los genotipos de mayor    prevalencia son el 2 y 1b (36). En el pa&iacute;s no existen estudios de esta    infecci&oacute;n en centros penitenciarios, por lo cual se desconoce su situaci&oacute;n    real en estas instituciones.</p>     <p>El hacinamiento, la promiscuidad sexual, la drogadicci&oacute;n y las deficientes    condiciones sanitarias que presentan la mayor&iacute;a de las instituciones    penitenciarias en Venezuela (40), constituyen factores determinantes en la adquisici&oacute;n    y transmisi&oacute;n del virus de la hepatitis C. El presente estudio tuvo como    objetivo determinar la prevalencia de este virus en una poblaci&oacute;n de    reclusos de Maracaibo, Venezuela, y los factores de riesgo involucrados en la    infecci&oacute;n.</p>     ]]></body>
<body><![CDATA[<p><b>Material y m&eacute;todos</b></p>     <p>La C&aacute;rcel Nacional de Sabaneta en Maracaibo, Venezuela, es el principal    centro penitenciario de la ciudad. Fue construida para 800 reclusos y, hoy en    d&iacute;a, alberga a 1.000 individuos. </p>     <p>Se realiz&oacute; un estudio de tipo transversal en 200 individuos escogidos    al azar (33 o 34 individuos de cada una de las seis secciones que tiene el penal),    lo cual representa el 20% de la poblaci&oacute;n total. Los criterios de inclusi&oacute;n    fueron ser recluso y del sexo masculino; los de exclusi&oacute;n fueron no estar    sometido a la disciplina penitenciaria y ser mujer. </p>     <p>Previo conocimiento y aprobaci&oacute;n por parte de la instituci&oacute;n    del objetivo de la investigaci&oacute;n, y del consentimiento voluntario de    cada individuo, se extrajeron 8 ml de sangre venosa, sin anticoagulante, para    la obtenci&oacute;n del suero, el cual fue guardado a -20°C hasta el momento    de su procesamiento. </p>     <p>Se realiz&oacute; una encuesta a todos los individuos seleccionados para obtener    informaci&oacute;n acerca de los factores de riesgo, como: usuarios de drogas    intravenosas, jeringas compartidas, tatuajes, <i>piercings</i>, transfusiones,    h&aacute;bitos sexuales a&ntilde;os de reclusi&oacute;n. </p>     <p>La detecci&oacute;n de ant&iacute;genos contra el virus de la hepatitis C,    anti-VHC, se realiz&oacute; por duplicado utilizando el m&eacute;todo inmunoenzim&aacute;tico    (ELISA) INNOTEST HCV Ab IV® (Innogenetics Lab., B&eacute;lgica); el punto de    corte fue de 0,583. Los resultados doblemente positivos fueron confirmados por    el m&eacute;todo <i>inmunoblot</i> de INNO-LIA HCV ab III® (Innogenetics Lab.,    B&eacute;lgica). </p>     <p>La presencia del ARN viral se detect&oacute; mediante la t&eacute;cnica de reacci&oacute;n    en RT-cadena de la polimerasa (RT-PCR) (HCV Fast®, Pharma Gen S.A., Espa&ntilde;a).    Se consider&oacute; positiva toda muestra reactiva por ELISA y confirmada por    INNO-LIA (presencia de dos o m&aacute;s bandas reactivas).</p>     <p>Para el an&aacute;lisis estad&iacute;stico de los resultados se utiliz&oacute;    el test exacto de Fisher y se determin&oacute; el <i>odds ratio</i> (OR) de    las variables estudiadas. Para el estudio de correlaciones entre variables,    se utiliz&oacute; el an&aacute;lisis de correlaci&oacute;n de Spearman. El &iacute;ndice    de confianza fue de 95%, consider&aacute;ndose como significativa toda probabilidad    menor de 0,05 (p&lt;0,05).</p>     <p>El presente estudio fue aprobado por el Comit&eacute; &Eacute;tico del Consejo de Desarrollo    Cient&iacute;fico y Human&iacute;stico (CONDES) de la Universidad del Zulia    y por la direcci&oacute;n de la C&aacute;rcel de Sabaneta. Asimismo, se siguieron    las recomendaciones de la Declaraci&oacute;n de Helsinki para estudios en humanos    (revisi&oacute;n de octubre, 2000). Al Director de la instituci&oacute;n se    le notific&oacute; de los reclusos hallados positivos y se le dieron instrucciones    sobre la prevenci&oacute;n de la infecci&oacute;n y el tratamiento de los casos    positivos.</p>     <p><b>Resultados</b></p>     ]]></body>
<body><![CDATA[<p>El promedio de edad de la poblaci&oacute;n fue 31,6±9,9 a&ntilde;os (X ± DE).    El mayor porcentaje de positividad (8,8%) estuvo en el grupo de 30 a 39 a&ntilde;os,    difiriendo significativamente (p&lt;0,05) del grupo de 20 a 29 a&ntilde;os (OR=12,523;    IC95% 0,6345-247,1). La frecuencia obtenida por la t&eacute;cnica ELISA fue de    5% (10/200); de estas 10 muestras reactivas, 3 resultaron positivas (reactividad    en m&aacute;s de 3 bandas) por la t&eacute;cnica de INNO-LIA (1,5%). Se detect&oacute;    la presencia del ARN viral en las 3 muestras positivas por INNO-LIA, lo que    indic&oacute; 1,5% de infecci&oacute;n activa (<a href="#cuadro1">cuadro 1</a>),    que podr&iacute;a significar infecci&oacute;n aguda. </p>     <p>        <center>     <a name="cuadro1"><img src="img/revistas/bio/v29n4/4a18t1.gif"></a>    </center> </p>     <p>Los tres reclusos positivos para el virus de la hepatitis C ten&iacute;an edades    entre 30 a 39 a&ntilde;os, uno de ellos usaba drogas intravenosas antes de entrar    a prisi&oacute;n, no ten&iacute;an tatuajes, ni <i>piercings</i> y no utilizaban    preservativos en sus relaciones sexuales; ten&iacute;an 3, 5 y 8 a&ntilde;os    (promedio=5,3) de reclusi&oacute;n.</p>     <p>La encuesta indic&oacute; que el 91,5% (183/200) de los presidiarios ten&iacute;a    uno o m&aacute;s factores de riesgo (<a href="#cuadro2">cuadro 2</a>) y estuvo    expuesto a la administraci&oacute;n intravenosa de medicamentos), 2,5% (5/200)    hab&iacute;a tenido, al menos, una transfusi&oacute;n, 6% (12/200) se administraba    coca&iacute;na por v&iacute;a endovenosa antes y durante su estad&iacute;a en    prisi&oacute;n, 60% (120/200) inger&iacute;a o inhalaba drogas (coca&iacute;na,    marihuana, <i>crack</i>, coca&iacute;na), 11% (22/200) presentaba tatuajes,    pero ninguno de los seropositivos y el 56% (112/200) no usaba preservativos.    S&oacute;lo 9 de los 197 individuos seronegativos se&ntilde;alaron ser usuarios    de drogas intravenosas (p&lt;0,001) (OR=138,89; IC95% 6,679-2.888,5), No se    encontr&oacute; asociaci&oacute;n significativa de otros factores potenciales    de riesgo con el virus de la hepatitis C.</p>     <p>        <center>     <a name="cuadro2"><img src="img/revistas/bio/v29n4/4a18t2.gif"></a>    </center> </p>     <p><b>Discusi&oacute;n</b></p>     <p>Los presentes datos pueden reflejar una subestimaci&oacute;n de la prevalencia    de la infecci&oacute;n por el virus de la hepatitis C en la poblaci&oacute;n    de reclusos examinados, ya que los resultados no reactivos con la t&eacute;cnica    de ELISA no se confirmaron. Sin embargo, con base en estudios previos en la    regi&oacute;n (33,41), si existe subestimaci&oacute;n, &eacute;sta deber&iacute;a    ser m&iacute;nima. A pesar de esta limitaci&oacute;n, el presente estudio tiene    algunas fortalezas: los participantes fueron escogidos al azar, la participaci&oacute;n    de los individuos seleccionados fue alta y la muestra estudiada fue representativa.    Este estudio es el primero en Venezuela, y uno de los pocos en Latinoam&eacute;rica,    en determinar la prevalencia de la infecci&oacute;n por el virus de la hepatitis    C en poblaci&oacute;n de prisioneros y aporta datos epidemiol&oacute;gicos sobre    la infecci&oacute;n.</p>     <p>La prevalencia (1,5%) fue baja en relaci&oacute;n con los porcentajes reportados    en otras c&aacute;rceles de Estados Unidos, Irlanda, Espa&ntilde;a, M&eacute;xico    y Brasil (6,16,17,18-30), y en quienes est&aacute;n en hemodi&aacute;lisis o    reciben transfusiones m&uacuteltiples en Venezuela (34-36). Sin embargo, concuerda    con las bajas prevalencias observadas en la poblaci&oacute;n general, trabajadoras    sexuales, usuarios de drogas intravenosas y donantes de este pa&iacute;s (33,38,39),    lo cual sugiere una baja circulaci&oacute;n del virus en la regi&oacute;n.</p>     ]]></body>
<body><![CDATA[<p>Muy probablemente, la expansi&oacute;n del virus en Europa, Am&eacute;rica y    Australia se deba en parte a la adicci&oacute;n a drogas il&iacute;citas de    administraci&oacute;n endovenosa en los a&ntilde;os 80, cuando aparece el boom    de la adicci&oacute;n a la hero&iacute;na. Este factor ha tenido una presencia    mucho menor en Am&eacute;rica Latina, lo que probablemente ha influido en la    poca frecuencia de la infecci&oacute;n en comparaci&oacute;n a la observada    en otros pa&iacute;ses. </p>     <p>Estudios previos se&ntilde;alan el uso de drogas intravenosas como factor determinante    en la adquisici&oacute;n de la infecci&oacute;n por el virus de la hepatitis    C en instituciones carcelarias (12-17). Los hallazgos de este estudio sugieren    que el uso de drogas intravenosas, confirmado en los tres individuos seropositivos    que proven&iacute;an de Maracaibo, fue un factor de riesgo, ya que dos de los    tres individuos positivos no las usaban antes de la reclusi&oacute;n. Existe,    tambi&eacute;n, el riesgo de adquirir la infecci&oacute;n al compartir jeringuillas    u otros objetos punzantes o penetrantes procedentes de los individuos seropositivos.    El 60% de los encuestados refirieron consumir o inhalar las drogas, pero en    forma aislada o en peque&ntilde;os grupos (2,3), lo cual limitar&iacute;a la    adquisici&oacute;n del virus por esta v&iacute;a.</p>     <p>Los individuos que presentaban tatuajes refirieron hab&eacute;rselos realizado    antes de entrar en prisi&oacute;n, lo que hace presumir que no es una pr&aacute;ctica    com&uacuten en esta poblaci&oacute;n. El no usar preservativos en las relaciones    &iacute;ntimas, llevadas a cabo en su mayor&iacute;a con trabajadoras sexuales,    parecen no estar asociados en forma significativa a la infecci&oacute;n. Los    estudios previos realizados en la regi&oacute;n indican ausencia de la infecci&oacute;n    en estas mujeres (33) y baja prevalencia del virus en la poblaci&oacute;n general,    lo cual concuerda con nuestros resultados. Sin embargo, debido al tama&ntilde;o    de la muestra estudiada no se puede descartar que los h&aacute;bitos sexuales    y el uso de tatuajes jueguen un papel en la transmisi&oacute;n de la infecci&oacute;n    en la c&aacute;rcel de Sabaneta, Maracaibo.</p>     <p>La prevalencia de la infecci&oacute;n por virus de la hepatitis C en la poblaci&oacute;n    de reclusos de Maracaibo, Venezuela, es baja, lo que muestra la baja circulaci&oacute;n    del virus en el pa&iacute;s y el principal factor de riesgo parece ser el uso    de drogas intravenosas. Otros factores de riesgo parecen no estar involucrados    en la adquisici&oacute;n de la infecci&oacute;n.</p>     <p>        <center>     <b>Conflicto de intereses</b>    </center> </p>     <p>Los autores declaran no tener ning&uacuten conflicto de inter&eacute;s.</p>     <p>        <center>     <b>Financiaci&oacute;n</b>    </center> </p>     <p>La presente investigaci&oacute;n fue subvencionada por el Consejo de Desarrollo    Cient&iacute;fico y Human&iacute;stico de la Universidad del Zulia (CONDES).    Subvenci&oacute;n No. CC0874-04.</p>     ]]></body>
<body><![CDATA[<p>Correspondencia:</p>     <p>Francisca Monsalve, Calle 67ª con Avenida 14ª, Edificio Orosi, apartamento    4-B, Maracaibo, Venezuela. Telefax: (58-261) 752 9286 <a href="mailto:monsalve22000@hotmail.com">monsalve22000@hotmail.com</a></p>     <p>        <center>     <b>Referencias</b>    </center> </p>     <!-- ref --><p>1. <b>Blonski W, Reddy KR.</b> Hepatitis C virus infection and hepato-cellular    carcinoma. Clin Liver Dis. 2008;12:661-74.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000067&pid=S0120-4157200900040001800001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>2. <b>Allain JP, Stramer SL, Carneiro-Proietti AB, Martins ML, Lopes da Silva    SN, Ribeiro M, <i>et al.</i></b> Transfusion-transmitted infectious diseases.    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