<?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>0186-4866</journal-id>
<journal-title><![CDATA[Medicina interna de México]]></journal-title>
<abbrev-journal-title><![CDATA[Med. interna Méx.]]></abbrev-journal-title>
<issn>0186-4866</issn>
<publisher>
<publisher-name><![CDATA[Edición y Farmacia S.A. de C.V.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0186-48662017000300351</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tifus]]></article-title>
<article-title xml:lang="en"><![CDATA[Typhus]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Acosta]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar-García]]></surname>
<given-names><![CDATA[CR]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar-Arce]]></surname>
<given-names><![CDATA[IE]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,IMSS Hospital General de Zona núm. 197 ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<volume>33</volume>
<numero>3</numero>
<fpage>351</fpage>
<lpage>362</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0186-48662017000300351&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0186-48662017000300351&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0186-48662017000300351&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El género Rickettsia está compuesto por dos grupos definidos antigenicamente: el grupo tifus, que incluye a Rickettsiaprowazekii, causante del tifus epidémico o exantemático, y a R. typhi, causante del tifus murino o endémico; el otro grupo es el de las fiebres manchadas. El género Rickettsia está constituido por diferentes especies de bacterias gramnegativas; a su vez, forma parte de la familia Rickettsiaceae (junto a Coxiella, Ehrlichia y Bartonella). Todas las especies del género tienen en común ser parásitos intracelulares estrictos con tamaño promedio de 0.3 a 0.5 pm, además de que requieren ciertos vectores que permitan su trasmisión y es difícil cultivarlas en el laboratorio. Este artículo revisa las variedades de manifestación del tifus y su situación en México.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The genus Rickettsia is composed of two groups antigenically defined, typhus group including Rickettsia prowazekii, which causes epidemic typhus and R. typhi, which causes murine or endemic typhus. The other group is one of spotted fever. The genus Rickettsia is made up of different species of gramnegative bacteria, in turn it is part of the family Rickettsiaceae (with Coxiella, Ehrlichia, and Bartonella). All species of the genus have in common being strict intracellular parasites with an average size of 0.3 to 0.5 pm, require certain vectors that allow trasmission, and have great difficulty be grown in the laboratory. Below there is a review of the varieties of presentation of typhus and its situation in Mexico.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Rickettsia]]></kwd>
<kwd lng="es"><![CDATA[tifus]]></kwd>
<kwd lng="es"><![CDATA[piojo]]></kwd>
<kwd lng="es"><![CDATA[fiebre manchada]]></kwd>
<kwd lng="en"><![CDATA[Rickettsia]]></kwd>
<kwd lng="en"><![CDATA[typhus]]></kwd>
<kwd lng="en"><![CDATA[louse spotted fever]]></kwd>
</kwd-group>
</article-meta>
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