<?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>0123-9392</journal-id>
<journal-title><![CDATA[Infectio]]></journal-title>
<abbrev-journal-title><![CDATA[Infect.]]></abbrev-journal-title>
<issn>0123-9392</issn>
<publisher>
<publisher-name><![CDATA[Asociación Colombiana de Infectología.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-93922012000200006</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efectos adversos del tratamiento antirretroviral en niños infectados por el virus de la inmunodeficiencia humana]]></article-title>
<article-title xml:lang="en"><![CDATA[Adverse effects of antiretroviral treatment in children infected by the human immunodeficiency virus]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Usuga]]></surname>
<given-names><![CDATA[Xiomara]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Cooperativa de Colombia Facultad de Medicina Grupo Infettare]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<volume>16</volume>
<numero>2</numero>
<fpage>122</fpage>
<lpage>127</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-93922012000200006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-93922012000200006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-93922012000200006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Desde que se conoció la infección por el virus de la inmunodeficiencia humana (VIH), se han diagnosticado más de 2,5 millones de niños infectados a nivel mundial. Con este conocimiento vino también la generación del tratamiento HAART (Highly Active Antiretroviral Therapy), que logró mejorar la calidad de vida y la expectativa de vida de los lactantes infectados. Sin embargo, los individuos que reciben tratamiento presentan condiciones particulares que los hacen constituir un grupo de individuos con necesidades de atención y cuidado diferentes. En esta revisión se abordan los aspectos clínicos más relevantes que aquejan a los niños infectados por VIH que reciben tratamiento antirretroviral altamente activo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Since the human immunodeficiency virus (HIV) was known, more than 2.5 million infected children around the world have been diagnosed. With this knowledge also came the advent of the Highly Active Antiretroviral Therapy (HAART) which has achieved a better quality of life and greater life expectancy of unweaned infected babies. However, people receiving this therapy present particular conditions that make them a population with different attention and care needs. This review addresses the most relevant clinical aspects present in HIV infected children receiving HAART.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[infantes]]></kwd>
<kwd lng="es"><![CDATA[VIH]]></kwd>
<kwd lng="es"><![CDATA[HAART]]></kwd>
<kwd lng="en"><![CDATA[child]]></kwd>
<kwd lng="en"><![CDATA[HIV]]></kwd>
<kwd lng="en"><![CDATA[HAART]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   <font face="verdana" size="2">      <p>    <center>ART&Iacute;CULO DE REVISI&Oacute;N</center></p>     <p><font size="4">    <center><b>Efectos adversos del tratamiento antirretroviral en ni&ntilde;os infectados por el virus de la inmunodeficiencia humana</b></center></font></p>      <p><font size="3">    <center>Adverse effects of antiretroviral treatment in children infected by the human immunodeficiency virus</center></font></p>     <p>    <center>Xiomara Usuga<sup>1</sup></center></p>     <p><sup>1</sup>Grupo Infettare. Facultad de Medicina. Universidad Cooperativa de Colombia, Medell&iacute;n, Colombia</p>     ]]></body>
<body><![CDATA[<p>Recibido: 13/12/2011; Aceptado: 09/05/2012</p> <hr size="1">     <p>Resumen</p>     <p>Desde que se conoci&oacute; la infecci&oacute;n por el virus de la inmunodeficiencia humana (VIH), se han diagnosticado m&aacute;s de 2,5 millones de ni&ntilde;os infectados a nivel mundial. Con este conocimiento vino tambi&eacute;n la generaci&oacute;n del tratamiento HAART (<i>Highly Active Antiretroviral Therapy</i>), que logr&oacute; mejorar la calidad de vida y la expectativa de vida de los lactantes infectados. Sin embargo, los individuos que reciben tratamiento presentan condiciones particulares que los hacen constituir un grupo de individuos con necesidades de atenci&oacute;n y cuidado diferentes. En esta revisi&oacute;n se abordan los aspectos cl&iacute;nicos m&aacute;s relevantes que aquejan a los ni&ntilde;os infectados por VIH que reciben tratamiento antirretroviral altamente activo.</p>       <p><b>Palabras claves</b>: infantes, VIH, HAART.</p> <hr size="1">      <p>Abstract </p>     <p>Since the human immunodeficiency virus (HIV) was known, more than 2.5 million infected children around the world have been diagnosed. With this knowledge also came the advent of the Highly Active Antiretroviral Therapy (HAART) which has achieved a better quality of life and greater life expectancy of unweaned infected babies. However, people receiving this therapy present particular conditions that make them a population with different attention and care needs. This review addresses the most relevant clinical aspects present in HIV infected children receiving HAART.</p>       <p><b>Key words</b>: child, HIV, HAART</p> <hr size="1">     <p><b>Introducci&oacute;n </b></p>     <p>El VIH-1 y el VIH-2, como agentes causales de la inmunodeficiencia humana, han sido responsables de la infecci&oacute;n de m&aacute;s de 2,5 millones de ni&ntilde;os desde su aparici&oacute;n <sup>(1)</sup> y de la infecci&oacute;n de, aproximadamente, 370.000 menores de 15 a&ntilde;os en el 2009 <sup>(1)</sup>.</p>      <p>En los &uacute;ltimos a&ntilde;os, la incidencia de esta infecci&oacute;n en lactantes ha tenido un gran descenso en los pa&iacute;ses desarrollados gracias a la implementaci&oacute;n de estrategias que permiten el diagn&oacute;stico temprano de la infecci&oacute;n en mujeres embarazadas y, por consiguiente, el tratamiento antirretroviral para la prevenci&oacute;n de la transmisi&oacute;n vertical <sup>(2)</sup>. En cambio, a pesar del establecimiento de estrategias similares, en la mayor&iacute;a de pa&iacute;ses en desarrollo otras condiciones, como la falta de recursos, la poca disponibilidad de los medicamentos y de las pruebas diagn&oacute;sticas en los servicios de salud, principalmente en &aacute;reas rurales, han impedido que la tasa de transmisi&oacute;n vertical haya tenido el mismo impacto <sup>(2)</sup>. Esto se ve reflejado en regiones como Asia central con 3.400 ni&ntilde;os infectados en 2009, el este asi&aacute;tico con 1.900 ni&ntilde;os, y Centroam&eacute;rica y Suram&eacute;rica con cerca de 4.300 ni&ntilde;os infectados en ese mismo a&ntilde;o, sin contar en Colombia con este dato <sup>(1)</sup>.</p>      ]]></body>
<body><![CDATA[<p>A finales de 2004, se estimaba que en Colombia hab&iacute;a entre 4.000 y 8.000 ni&ntilde;os infectados <sup>(3)</sup>, y un reporte no oficial en el a&ntilde;o 2009 indicaba que se hab&iacute;an registrado 2.074 ni&ntilde;os y adolescentes con la infecci&oacute;n; incluso, all&iacute; se se&ntilde;ala que hay un gran subregistro y que, posiblemente, el n&uacute;mero real sea mayor <sup>(4)</sup>. Es precisamente esta poblaci&oacute;n de lactantes infectados la que se constituye en un grupo particular de atenci&oacute;n, haci&eacute;ndose necesario e indispensable tener un conocimiento amplio sobre los aspectos inmunol&oacute;gicos, cl&iacute;nicos, metab&oacute;licos y neurol&oacute;gicos relacionados con el tratamiento antirretroviral, debido a que esta poblaci&oacute;n a&uacute;n sigue en crecimiento en nuestro departamento y en el pa&iacute;s.</p>      <p>Los diversos medicamentos contra el VIH se han clasificado, seg&uacute;n la mol&eacute;cula sobre la que act&uacute;an, en inhibidores de proteasas, inhibidores de la transcriptasa inversa, inhibidores de la integrasa e inhibidores de la fusi&oacute;n o de la entrada (<a href="#tabla1">tabla 1</a>). El tratamiento antirretroviral de gran actividad (<i>Highly Active Antiretroviral Therapy</i>, HAART) consiste en el uso de tres f&aacute;rmacos, como m&iacute;nimo, que pertenecen a los diferentes grupos mencionados anteriormente, y que consta, generalmente, de dos inhibidores de la transcriptasa: uno nucle&oacute;sido y otro no nucle&oacute;sido. Al ser un tratamiento contra varios blancos, el impacto sobre la replicaci&oacute;n viral es bastante efectivo y logra disminuir la cantidad de &aacute;cido ribonucleico (ARN) viral plasm&aacute;tico hasta niveles indetectables. Por consiguiente, la baja cantidad de progenie viral repercute en un m&iacute;nimo da&ntilde;o celular y permite que los individuos infectados puedan restablecer sus niveles de linfocitos T CD4+ y otras poblaciones celulares tambi&eacute;n afectadas.</p>      <p>    <center> <a name="tabla1"><img src="img/revistas/inf/v16n2/v16n2a08t1.gif"></a></center></p>      <p>La Organizaci&oacute;n Mundial de la Salud (OMS) recomienda que todos los ni&ntilde;os menores de dos a&ntilde;os, reciban tratamiento antirretroviral <sup>(1)</sup>. El protocolo recomendado para los pa&iacute;ses en desarrollo consiste en dosis fijas de estaduvina, lamiduvina y nevirapina <sup>(2)</sup>. Para la implementaci&oacute;n de este esquema, se debe tener en cuenta que, si la madre recibi&oacute; nevirapina durante el embarazo, hay mayores probabilidades de que el virus transmitido al ni&ntilde;o ya haya creado resistencia a este medicamento y, por lo tanto, no se recomienda este f&aacute;rmaco a esos lactantes. Adem&aacute;s, se ha retirado el uso de la estaduvina por sus efectos t&oacute;xicos.</p>      <p>El establecimiento del tratamiento antirretroviral ha permitido que los individuos infectados mejoren notablemente su calidad de vida. Por ejemplo, las manifestaciones cl&iacute;nicas t&iacute;picas observadas en los individuos infectados, especialmente las enfermedades asociadas a un bajo recuento de linfocitos T CD4+, se presentan con menor frecuencia en los individuos que reciben tratamiento <sup>(10)</sup>. No obstante, las personas infectadas que est&aacute;n bajo tratamiento presentan nuevos s&iacute;ndromes asociados con su uso.</p>      <p>Esta revisi&oacute;n se enfoca en revisar varios aspectos relacionados con la terapia HAART en ni&ntilde;os infectados. Para su elaboraci&oacute;n se hizo una b&uacute;squeda en las bases de datos Pubmed, Medline, Ovid, utilizando los siguientes t&eacute;rminos: <i>HIV infection</i>, <i>children</i>, <i>HAART</i>, <i>metabolic disorders</i>, <i>endocrinologic disorders</i>, <i>lypodistrophy</i>, <i>immunization </i>y <i>adverse effects. </i>Se combinaron los t&eacute;rminos y se restringi&oacute; la bibliograf&iacute;a a art&iacute;culos originales y a algunas revisiones.</p>       <p><b><i>Alteraciones metab&oacute;licas y endocrinas </i></b></p>     <p>En varios estudios se ha demostrado que el tratamiento antirretroviral se asocia con la aparici&oacute;n de efectos secundarios metab&oacute;licos, tales como dislipidemias <sup>(11-13)</sup>, resistencia a la insulina <sup>(14)</sup> y diabetes mellitus <sup>(15)</sup>, los cuales son factores de riesgo para la enfermedad cardiovascular <sup>(16)</sup>.</p>      <p>Las dislipidemias est&aacute;n estrechamente ligadas al s&iacute;ndrome de redistribuci&oacute;n de grasas, conocido como lipodistrofia, el cual se asocia a la raza, al estado cl&iacute;nico grave previo al tratamiento, a la duraci&oacute;n de la infecci&oacute;n por VIH y al tratamiento con inhibidores de nucle&oacute;sidos de la transcriptasa inversa <sup>(17)</sup> o con inhibidores de proteasas, como el ritonavir y el nelfinavir <sup>(18)</sup>. La lipodistrofia se caracteriza por lipoatrofia perif&eacute;rica, redistribuci&oacute;n de la grasa visceral y anormalidades en el metabolismo de las grasas y de la glucosa en los individuos infectados bajo tratamiento. Los mecanismos fisiopatol&oacute;gicos que explican los cambios metab&oacute;licos son complejos y dif&iacute;ciles de elucidar, debido a la dificultad de separar los efectos de la infecci&oacute;n <i>per se </i>de los efectos de la terapia HAART, adem&aacute;s de las enfermedades concomitantes y la vulnerabilidad individual.</p>      ]]></body>
<body><![CDATA[<p>En la mayor&iacute;a de ni&ntilde;os infectados por VIH se han encontrado bajas concentraciones de lipoprote&iacute;nas de alta densidad (HDL) y en la minor&iacute;a de ellos se han observado altos niveles de colesterol total, de triglic&eacute;ridos y de lipoprote&iacute;nas de baja densidad (LDL), asociados al uso de inhibidores de proteasas <sup>(11,13)</sup>. Los ni&ntilde;os menores de diez a&ntilde;os presentan las concentraciones m&aacute;s altas de colesterol total y lipoprote&iacute;nas LDL, comparadas con las de ni&ntilde;os mayores <sup>(11)</sup>. Tambi&eacute;n, se han observado bajos niveles de adiponectina y aumento de la liberaci&oacute;n de &aacute;cidos grasos libres por el tejido adiposo resistente a la insulina en los ni&ntilde;os <sup>(19)</sup>, lo cual estar&iacute;a relacionado con la presencia de grasa abdominal, la lipohipertrofia y la resistencia a la insulina <sup>(20)</sup>.</p>      <p>La resistencia a la insulina fue una de las primeras complicaciones metab&oacute;licas reportadas con el uso de la terapia HAART. Los ni&ntilde;os positivos para VIH tratados con inhibidores de nucle&oacute;sidos de la transcriptasa inversa son quienes presentan una mayor prevalencia de resistencia a la insulina, al ser comparados con adolescentes infectados bajo el mismo tratamiento <sup>(11)</sup>; esto, sumado a la presencia de otros factores de riesgo, tales como familiares con diabetes, un &iacute;ndice de masa corporal incrementado y la edad, puede conllevar a la aparici&oacute;n de diabetes mellitus <sup>(15,17)</sup>. Se han postulado varios mecanismos de acci&oacute;n de los antirretrovirales para incrementar la resistencia a la insulina: directamente, al causar disfunci&oacute;n mitocondrial en el m&uacute;sculo y con ello alterar la respuesta a la insulina <sup>(21)</sup>, o indirectamente, como una consecuencia de defectos en el metabolismo de los l&iacute;pidos derivados de la toxicidad antirretroviral, como la resistencia a la insulina observada en los pacientes con lipodistrofia asociada al VIH <sup>(14)</sup>.</p>       <p><b><i>Alergias </i></b></p>     <p>Hay una mayor incidencia de enfermedades al&eacute;rgicas en ni&ntilde;os positivos para VIH tratados con la terapia HAART que en aquellos sin tratamiento. En estudios recientes se demuestra que los ni&ntilde;os en tratamiento antirretroviral presentan m&aacute;s asma y dermatitis at&oacute;pica, igualando la incidencia y prevalencia de estas enfermedades en ni&ntilde;os sin VIH, lo que se debe a la reconstituci&oacute;n inmunol&oacute;gica lograda despu&eacute;s del tratamiento antirretroviral <sup>(22,23)</sup>.</p>     <p><b><i>Complicaciones neurol&oacute;gicas y psiqui&aacute;tricas </i></b></p>     <p>La complejidad de los sistemas neurol&oacute;gico y psicol&oacute;gico ha hecho dif&iacute;cil determinar los efectos de la infecci&oacute;n e, incluso, del tratamiento antirretroviral en ellos. A pesar de ello, en varios estudios de adultos infectados se demuestra que en el curso de la infecci&oacute;n se observan cambios cognitivos moderados, como d&eacute;ficit en la atenci&oacute;n, en la memoria, en el procesamiento de la informaci&oacute;n y en la funci&oacute;n motora fina <sup>(24)</sup>, pero, aunque algunas de estas manifestaciones desaparecen con el tratamiento, tambi&eacute;n se pueden presentar otras complicaciones a causa de la terapia HAART, tales como alteraciones psiqui&aacute;tricas y del humor, alteraciones neuromusculares y deterioro neurol&oacute;gico <sup>(25)</sup>. Como prueba de ello, el grupo de Neuenburg analiz&oacute; 436 cerebros post m&oacute;rtem y concluy&oacute; que, desde el uso de la terapia HAART, la incidencia de la encefalopat&iacute;a por VIH se increment&oacute; significativamente <sup>(26)</sup>, lo que puede sugerir que el tratamiento podr&iacute;a estar generando un da&ntilde;o cerebral o que no evita el da&ntilde;o causado por el virus <i>per se. </i></p>     <p>Los ni&ntilde;os infectados por VIH presentan graves alteraciones del sistema nervioso central y, a menudo, son progresivas y se reflejan en d&eacute;ficit cognitivo, del lenguaje, motor y del comportamiento. Entre ellas se encuentran la encefalopat&iacute;a observada en menores de un a&ntilde;o <sup>(27)</sup>, el trastorno hipercin&eacute;tico, el trastorno de tics transitorios y el retraso mental ligero en ni&ntilde;os mayores <sup>(28)</sup>, las alteraciones emocionales relacionadas con el conocimiento del diagn&oacute;stico, y la depresi&oacute;n y tristeza en adolescentes <sup>(28)</sup>.</p>      <p>Varios grupos estadounidenses quisieron evaluar el impacto de los inhibidores de proteasas en las deficiencias neuropsicol&oacute;gicas que presentaban los lactantes infectados antes del tratamiento, mediante un seguimiento por 48 semanas despu&eacute;s de establecido el tratamiento. Los investigadores encontraron que, en los ni&ntilde;os que presentaban un diagn&oacute;stico neurol&oacute;gico anormal antes del tratamiento, era m&aacute;s probable que desarrollaran nuevos s&iacute;ntomas neurol&oacute;gicos en las siguientes semanas de tratamiento <sup>(27)</sup>. Adem&aacute;s, llegaron a la conclusi&oacute;n de que, aunque el tratamiento ten&iacute;a un impacto notorio en la carga viral, su efecto en el funcionamiento neuropsicol&oacute;gico fue m&iacute;nimo.</p>      <p>Algunas de las manifestaciones m&aacute;s comunes de deterioro neurol&oacute;gico asociado al tratamiento antirretroviral en adultos, son el delirio <sup>(24)</sup>, la man&iacute;a <sup>(29)</sup> y la polineuropat&iacute;a sim&eacute;trica distal <sup>(30)</sup>. El uso de an&aacute;logos de nucle&oacute;sidos, como la estavudina, la didanosina y el zalcitabine, puede ser predictor de la presencia de neuropat&iacute;a perif&eacute;rica sensorial <sup>(31,32)</sup>. Algunos efectos en el sistema nervioso central de la zidovudina son insomnio, mialgia e intensos dolores de cabeza <sup>(33)</sup>.</p>      <p>Los inhibidores no nucle&oacute;sidos de la transcriptasa inversa han demostrado mejorar la funci&oacute;n del sistema nervioso central en individuos que presentan anormalidades en la funci&oacute;n motora <sup>(34)</sup>. A pesar de ello, el efavirenz es el &uacute;nico medicamento que presenta efectos adversos en el sistema nervioso central, como la depresi&oacute;n profunda y la ideaci&oacute;n suicida <sup>(35, 36)</sup>; tambi&eacute;n, se ha asociado con insomnio, alteraciones del sue&ntilde;o <sup>(37)</sup>, irritabilidad y nerviosismo <sup>(38)</sup>. Adem&aacute;s, se ha observado que los individuos con alteraciones neuropsiqui&aacute;tricas de base pueden tener un mayor riesgo de sufrir alteraciones debidas al uso del efavirenz <sup>(25,39)</sup>.</p>      ]]></body>
<body><![CDATA[<p>Teniendo en cuenta que los inhibidores de proteasas tienen muy poca capacidad de traspasar la barrera hematoencef&aacute;lica y penetrar en el cerebro, son medicamentos que no se asocian a efectos neurol&oacute;gicos. Sin embargo, en sus estudios, Bonfanti <sup>(40)</sup> y Gatti <sup>(41)</sup> reportaron que los altos niveles en plasma de ritonavir o de la combinaci&oacute;n ritonavir-saquinavir se correlacionan con aumento de la incidencia de efectos colaterales neurol&oacute;gicos, lo que sugiere que estos medicamentos s&iacute; pueden estar ejerciendo alg&uacute;n efecto sobre el sistema nervioso. Dado que estos medicamentos se usan en combinaci&oacute;n con los inhibidores de la transcriptasa inversa y a que no son una primera l&iacute;nea de tratamiento, se ha hecho dif&iacute;cil determinar los efectos reales de los inhibidores de proteasas.</p>      <p>Los datos anteriores demuestran que los medicamentos usados en la terapia HAART presentan un potencial da&ntilde;o a nivel neuropsicol&oacute;gico; infortunadamente, no hay estudios que analicen los efectos adversos de la terapia HAART en el sistema nervioso de los ni&ntilde;os infectados que reciben este tratamiento.</p>       <p><b><i>Acidosis l&aacute;ctica e hiperlactatemia </i></b> </p>     <p>La acidosis l&aacute;ctica es definida como niveles de lactato s&eacute;rico altos, pH menor de 7,34, bicarbonato s&eacute;rico y CO2 en cantidades bajas, mientras que la hiperlactatemia sintom&aacute;tica corresponde a lactato s&eacute;rico alto y niveles de CO2, pH y bicarbonato s&eacute;ricos normales, adem&aacute;s de la presencia de los correspondientes signos y s&iacute;ntomas, que incluyen anorexia, p&eacute;rdida de peso, neuropat&iacute;a perif&eacute;rica, disnea, cansancio y s&iacute;ntomas gastrointestinales inespec&iacute;ficos, como na&uacute;seas, v&oacute;mito, dolor y distensi&oacute;n abdominal. Estas dos alteraciones han sido ampliamente descritas en adultos que reciben tratamiento antirretroviral, con tasas de incidencia que var&iacute;an entre 2,2 % <sup>(42)</sup> y 10 % <sup>(43)</sup> y tasas de mortalidad hasta de 30,4 % por acidosis l&aacute;ctica <sup>(43)</sup>, mientras que, en el &uacute;nico estudio en ni&ntilde;os, de un total de 80, se hallaron 23 con hiperlactatemia asintom&aacute;tica, los cuales recib&iacute;an inhibidores de nucle&oacute;sidos de la transcriptasa inversa; adem&aacute;s, encontraron la edad como un factor de riesgo para la presentaci&oacute;n de hiperlactatemia <sup>(44)</sup>. Alimenti y su grupo <sup>(45)</sup> estudiaron el potencial t&oacute;xico del tratamiento en reci&eacute;n nacidos no infectados expuestos al tratamiento antirretroviral perinatalmente, y encontraron acidemia l&aacute;ctica transitoria en la mayor&iacute;a de ellos, cuando se suministraba zidovudina.</p>       <p><b><i>Infecciones </i></b></p>     <p>Si bien la presencia de enfermedades infecciosas ha disminuido en los ni&ntilde;os infectados por VIH gracias al establecimiento del tratamiento antirretroviral, en algunos estudios se ha demostrado que, aun bajo estas circunstancias, ellos siguen siendo una poblaci&oacute;n vulnerable.</p>      <p>Aunque esta situaci&oacute;n no representa un efecto adverso del tratamiento antirretroviral, es un aspecto importante que vale la pena analizar en los pacientes infectados. Mediante el an&aacute;lisis de una gran cohorte de ni&ntilde;os positivos para VIH provenientes de varios pa&iacute;ses de Am&eacute;rica Latina, se encontr&oacute; que presentaban varios procesos infecciosos, como neumon&iacute;a bacteriana, varicela, infecciones por dermatofitos, herpes simplex y herpes z&oacute;ster oral; en ese mismo estudio, se compar&oacute; esta cohorte con una de los Estados Unidos, y se observ&oacute; que los ni&ntilde;os presentaban las mismas infecciones pero que las incidencias eran mayores en el primer grupo <sup>(46, 47)</sup>.</p>      <p>Resultados similares se obtuvieron en un estudio en Brasil, donde las infecciones por bacterias, la neumon&iacute;a por <i>Pneumocystis jirovecii</i>, la sepsis y la meningitis bacteriana, fueron las enfermedades por microorganismos oportunistas m&aacute;s comunes entre 1.859 ni&ntilde;os en tratamiento antirretroviral <sup>(48)</sup>. Estos resultados demuestran que, a pesar del tratamiento, en estos ni&ntilde;os pueden presentarse varias enfermedades infecciosas que depender&aacute;n de la regi&oacute;n geogr&aacute;fica en la que est&eacute;n ubicados, cuyas condiciones de vida precarias repercutir&aacute;n inevitablemente en la poblaci&oacute;n infantil infectada por VIH.</p>       <p><b>Discusi&oacute;n </b></p>     <p>La terapia HAART ha permitido un apropiado manejo de la infecci&oacute;n por VIH con un impacto importante en la supervivencia a largo plazo y en la calidad de vida de los ni&ntilde;os infectados. Sin embargo, deben considerarse varias limitaciones de este tratamiento con el fin de evitar o atenuar la aparici&oacute;n de los efectos adversos. Varios de los efectos aqu&iacute; descritos deben tenerse en cuenta y ser controlados eficientemente por el personal de la salud que atiende esta poblaci&oacute;n, con el fin de garantizar una buena atenci&oacute;n y calidad de vida de ellos. Es por ello que las Empresas Prestadoras de Salud (EPS) deber&iacute;an fortalecer el manejo cl&iacute;nico de los ni&ntilde;os infectados, e incluir el manejo de las complicaciones derivadas del tratamiento con cambios en el estilo de vida, acompa&ntilde;amiento psicol&oacute;gico y modificaci&oacute;n del tratamiento.</p>      ]]></body>
<body><![CDATA[<p>Correspondencia: Xiomara Usuga Perilla, Calle 48 #28-00. Facultad de Medicina, Medell&iacute;n, Colombia. Tel&eacute;fono: (574) 215-9000, extensi&oacute;n 527 Correo electr&oacute;nico: <a href="mailto:xiomara.usuga@campusucc.edu.co">xiomara.usuga@campusucc.edu.co</a></p>      <p><b>Referencias </b></p>     <!-- ref --><p>1. UNAIDS. UNAIDS Report on the global AIDS epidemic. 2010. Fecha de consulta: 1&deg; de noviembre de 2011. Disponible en: <a href="http://www. unaids.org/globalreport/Epi_slides.htm" target="_blank">http://www. unaids.org/globalreport/Epi_slides.htm</a>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000055&pid=S0123-9392201200020000600001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>2. Lallemant M, Chang S, Cohen R, Pecoul B. Pediatric HIV - A neglected disease? 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