<?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>0120-0011</journal-id>
<journal-title><![CDATA[Revista de la Facultad de Medicina]]></journal-title>
<abbrev-journal-title><![CDATA[rev.fac.med.]]></abbrev-journal-title>
<issn>0120-0011</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-00112018000400639</article-id>
<article-id pub-id-type="doi">10.15446/revfacmed.v66n4.67069</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Empyema necessitatis due to Citrobacter freundii: Case report]]></article-title>
<article-title xml:lang="es"><![CDATA[Empiema necessitatis por Citrobacter freundii. Reporte de caso]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Lugo]]></surname>
<given-names><![CDATA[Diego Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Empresa Social del Estado Hospital Departamental San Vicente de Paul  ]]></institution>
<addr-line><![CDATA[Garzón Huila]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>66</volume>
<numero>4</numero>
<fpage>639</fpage>
<lpage>642</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-00112018000400639&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-00112018000400639&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-00112018000400639&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: This paper presents the first case of empyema necessitatis secondary to infection with Citrobacter freundii (according to the databases consulted), and one of the few reports of this pathology in Colombia.  Case presentation: This is the case of a 26-year-old patient from a rural area, with a history of severe cognitive deficit, who was taken to the emergency department due to a clinical picture of 15 days of evolution consisting of neurological deterioration associated with asthenia, adynamia, fever and cough with purulent expectoration. On admission, a chest x-ray was taken, finding pneumonia of the middle lobe with associated pleural effusion, for which empirical antibiotic management was initiated. The patient presented clinical deterioration and appearance of right pectoral mass, so a computed tomography of the thorax was performed, revealing empyema necessitatis. Close drainage and culture of the collection were made, with negative mycobacteria culture and positive report for C. freundii. The patient received specific antibiotic treatment for 8 weeks, with complete improvement of his clinical condition.  Conclusion: Besides being the first case of empyema necessitatis by C. freundii that has been reported, this case is important because of the low amount of reports on this pathology in Colombia, considering that its main cause is tuberculosis, which is endemic in the country.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción. Según lo encontrado en las bases de datos consultadas, el presente es el primer caso de empiema necessitatis secundario a Citrobacter freundii. Además, constituye uno de los pocos reportes de esta patología en Colombia.  Presentación del caso. Se trata de un paciente de 26 años procedente de área rural, con antecedente de déficit cognitivo severo, quien fue llevado al servicio de urgencias por cuadro clínico de 15 días de evolución consistente en deterioro neurológico asociado a astenia, adinamia, fiebre y tos con expectoración purulenta. Al ingreso se tomó radiografía de tórax, encontrando neumonía del lóbulo medio con derrame pleural asociado, por lo que se inició cubrimiento antibiótico empírico. El paciente presentó deterioro clínico y aparición de masa pectoral derecha, por lo que se realizó tomografía computarizada de tórax, evidenciando empiema necessitatis. Luego, se hizo drenaje de la colección, con cultivo negativo para micobacterias y aislamiento de C. freundii. Se dio tratamiento guiado por antibiograma durante ocho semanas, con posterior recuperación completa del cuadro clínico.  Conclusión. Además de ser el primer caso de empiema necessitatis por C. freundii, este es importante por la escasa cantidad de reportes en Colombia, considerando que su principal causa es la tuberculosis, la cual es endémica en el país.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Empyema Pleural]]></kwd>
<kwd lng="en"><![CDATA[Pneumonia]]></kwd>
<kwd lng="en"><![CDATA[Citrobacter freundii (MeSH)]]></kwd>
<kwd lng="es"><![CDATA[Empiema pleural]]></kwd>
<kwd lng="es"><![CDATA[Neumonía]]></kwd>
<kwd lng="es"><![CDATA[Citrobacter freundii (DeCS)]]></kwd>
</kwd-group>
</article-meta>
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