<?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>0001-6002</journal-id>
<journal-title><![CDATA[Acta Médica Costarricense]]></journal-title>
<abbrev-journal-title><![CDATA[Acta méd. costarric]]></abbrev-journal-title>
<issn>0001-6002</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Médicos y Cirujanos de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0001-60022021000200078</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cargas virales en pacientes trasplantados y genotipificación de Citomegalovirus]]></article-title>
<article-title xml:lang="en"><![CDATA[Viral loads in transplant patients and cytomegalovirus genotyping]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Cordero]]></surname>
<given-names><![CDATA[Elizabeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Sevilla]]></surname>
<given-names><![CDATA[María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera-Muñoz]]></surname>
<given-names><![CDATA[Álvaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Karkashian-Córdoba]]></surname>
<given-names><![CDATA[James]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital San Juan de Dios Laboratorio de Biología Molecular ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital San Juan de Dios Servicio de Hematología ]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital San Juan de Dios Servicio de Nefrología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Costa Rica Escuela de Biología Laboratorio de Biología Molecular]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<volume>63</volume>
<numero>2</numero>
<fpage>78</fpage>
<lpage>87</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0001-60022021000200078&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0001-60022021000200078&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0001-60022021000200078&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo:  Determinar el curso de infecciones virales por un periodo de un año, mediante la medición de la carga viral de Adenovirus, virus BK, virus Epstein-Barr, Citomegalovirus y Herpesvirus humano 6, en 30 pacientes del Hospital San Juan de Dios, sometidos a trasplante de riñón o células progenitoras hematopoyéticas.  Métodos:  Se determinaron las cargas virales en diez muestras de sangre por paciente: una muestra pretransplante, ocho muestras obtenidas cada dos semanas postrasplante y una última muestra a los seis meses posteriores al trasplante. La cuantificación de los virus se realizó por reacción en cadena de la polimerasa en tiempo real y, solo en el caso del Adenovirus, por reacción en cadena de la polimerasa de punto final. También se determinaron los genotipos de Citomegalovirus en los pacientes positivos para este virus, utilizando una reacción en cadena de la polimerasa dirigida al gen de la glicoproteína B y secuenciación de los fragmentos amplificados. Las secuencias obtenidas fueron comparadas y alineadas con una secuencia de referencia, utilizando el programa Clustal Omega.  Resultados:  Al 77 % de los pacientes se les detectó al menos uno de los cinco virus analizados y el virus con mayor prevalencia fue el Citomegalovirus, con un 57% de positividad del total de la población. El genotipo de Citomegalovirus que más se detectó fue el genotipo 3. Se monitoreó el comportamiento de las cargas virales para cada virus analizado y la proporción de su incidencia entre pacientes masculinos y femeninos.  Conclusiones:  La cuantificación y caracterización de virus en pacientes de trasplante, permite un mejor manejo clínico del paciente con infecciones oportunistas y también un manejo más adecuado de las terapias farmacológicas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary  Aim: The objective of this study was to determine the course of viral infections during a period of one year, by measuring viral loads for Adenovirus, BK virus, Epstein-Barr virus, Cytomegalovirus and Human herpesvirus 6, in 30 patients from the San Juan de Dios National Hospital, undergoing kidney or hematopoietic progenitor cell transplants.  Methods:  Viral loads were determined in ten blood samples from each patient: a pre- transplant sample, eight samples obtained at two-week intervals post-transplant and one last sample at six months post-transplant. Viral quantification was performed by real-time polymerase chain reaction and, only for Adenovirus, by end-point polymerase chain reaction. Also, Cytomegalovirus genotypes were determined in patients that tested positive for this virus, by polymerase chain reaction directed towards the glycoprotein B gene and sequencing of the amplified fragments. These sequences were compared and aligned with a reference sequence, using the Clustal Omega Program.  Results:  The results of the study indicated that 77% of the patients had at least one of the five viruses detected and the virus with the highest prevalence was Cytomegalovirus, exhibiting 57% positivity in the total population studied. The most frequent Cytomegalovirus genotype detected was genotype 3. The viral load behavior was monitored for each virus analyzed as well as the incidence proportion between male and female patients.  Conclusions.  Viral quantification and characterization in transplant patients allows for better clinical management of patients with opportunistic infections and also a better management of pharmacological therapies.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Trasplante]]></kwd>
<kwd lng="es"><![CDATA[Inmunosupresión]]></kwd>
<kwd lng="es"><![CDATA[Carga viral]]></kwd>
<kwd lng="es"><![CDATA[Genotipo]]></kwd>
<kwd lng="en"><![CDATA[Transplantation]]></kwd>
<kwd lng="en"><![CDATA[Immunosuppression]]></kwd>
<kwd lng="en"><![CDATA[Viral load]]></kwd>
<kwd lng="en"><![CDATA[Genotype]]></kwd>
</kwd-group>
</article-meta>
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