<?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>0016-3813</journal-id>
<journal-title><![CDATA[Gaceta médica de México]]></journal-title>
<abbrev-journal-title><![CDATA[Gac. Méd. Méx]]></abbrev-journal-title>
<issn>0016-3813</issn>
<publisher>
<publisher-name><![CDATA[Academia Nacional de Medicina de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-38132021000500533</article-id>
<article-id pub-id-type="doi">10.24875/gmm.21000466</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Colonización cervicovaginal y rectal por estreptococos del grupo B en embarazadas mexicanas a término]]></article-title>
<article-title xml:lang="en"><![CDATA[Cervicovaginal and rectal colonization by group B Streptococcus in Mexican women with full-term pregnancies]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cabrera-Reyes]]></surname>
<given-names><![CDATA[Azucena L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-García]]></surname>
<given-names><![CDATA[María del Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palacios-Saucedo]]></surname>
<given-names><![CDATA[Gerardo del C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Montes]]></surname>
<given-names><![CDATA[Othón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cajero-Avelar]]></surname>
<given-names><![CDATA[Adriana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solórzano-Santos]]></surname>
<given-names><![CDATA[Fortino]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital General de Zona 27 Departamento de Pediatría]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Infantil de México Federico Gómez Unidad de Investigación de Enfermedades Infecciosas ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Mexicano del Seguro Social UMAE Hospital de Especialidades N.º 25 División de Investigación en Salud]]></institution>
<addr-line><![CDATA[Monterrey N.L]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Mexicano del Seguro Social UMAE Hospital de Pediatría Centro Médico Nacional SXXI Unidad de Investigación Médica en Enfermedades Infecciosas]]></institution>
<addr-line><![CDATA[Aguascalientes Ags]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Secretaría de Salud Hospital Centenario Miguel Hidalgo Departamento de Enfermedades Infecciosas Pediátricas]]></institution>
<addr-line><![CDATA[Aguascalientes Ags]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2021</year>
</pub-date>
<volume>157</volume>
<numero>5</numero>
<fpage>533</fpage>
<lpage>538</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-38132021000500533&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-38132021000500533&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-38132021000500533&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: Una mujer embarazada colonizada por estreptococo del grupo B por vía rectal o vaginal puede infectar a su recién nacido.  Pacientes y métodos: Estudio prospectivo, transversal y analítico, durante 24 meses, en embarazadas. Se incluyeron aquellas en trabajo de parto con &#8805; 36 semanas de gestación. El embarazo se clasificó como normal o de alto riesgo. Se analizaron los principales factores de riesgo de las embarazadas. Se tomaron muestras rectales y vaginales, se colocaron en caldo Todd-Hewitt y posteriormente se inocularon en agar sangre de carnero al 5%. La identificación se realizó mediante pruebas bioquímicas y aglutinación con látex.  Resultados: Se incluyeron 3,347 embarazadas, edad media 25.6 ± 5.3 años, 95.5% con control prenatal; 2,213 (66%) embarazo de riesgo normal y 1,370 (41%) obtenidas por cesárea. La colonización global fue del 4.3% (145/3,347), siendo mayor en el grupo de edad de 30 a 34 años (6.8%). El serotipo I (58%) fue el más frecuente.  Conclusión: El porcentaje de colonización en esta población fue bajo. Un programa sistemático de cultivo cervicovaginal y rectal en mujeres embarazadas y el programa de profilaxis antimicrobiana intraparto son controvertidos en nuestra región.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: A pregnant woman rectally or vaginally colonized by group B Streptococcus can infect her newborn.  Patients and methods: Prospective, cross-sectional, analytical 24-month study in pregnant women. Women in labor with &#8805; 36 weeks of gestation were included. Pregnancy was classified as normal or high-risk. Main risk factors of the pregnant women were analyzed. Rectal and vaginal samples were obtained, placed in Todd-Hewitt broth and subsequently inoculated in 5 % sheep blood agar. Identification was carried out by biochemical tests and latex agglutination.  Results: 3,347 pregnant women were included. Mean age was 25.6 ± 5.3 years, 95.5 % received antenatal care; 2,213 (66 %) had normal-risk pregnancies, and in 1,370 (41 %), delivery was by cesarean section. Overall colonization was 4.3 % (145/3,347), and it was higher in the 30-34 years age group (6.8 %). Serotype I (58 %) was the most common.  Conclusion: The percentage of colonization in this population was low. A routine cervicovaginal and rectal culture program in pregnant women and the intrapartum antimicrobial prophylaxis program are controversial in our region.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Colonización cervicovaginal]]></kwd>
<kwd lng="es"><![CDATA[Estreptococo del grupo B]]></kwd>
<kwd lng="es"><![CDATA[Embarazo]]></kwd>
<kwd lng="en"><![CDATA[Cervicovaginal colonization]]></kwd>
<kwd lng="en"><![CDATA[Group B streptococcus]]></kwd>
<kwd lng="en"><![CDATA[Pregnancy]]></kwd>
</kwd-group>
</article-meta>
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