<?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>0120-4157</journal-id>
<journal-title><![CDATA[Biomédica]]></journal-title>
<abbrev-journal-title><![CDATA[Biomédica]]></abbrev-journal-title>
<issn>0120-4157</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-41572018000600024</article-id>
<article-id pub-id-type="doi">10.7705/biomedica.v38i3.3408</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cultivo in vitro de larvas L3 de nematodos obtenidas del caracol gigante africano Lissachatina fulica (Mollusca: Gastropoda) en Santa Fe de Antioquia]]></article-title>
<article-title xml:lang="en"><![CDATA[In vitro culture of L3 larvae of nematodes obtained from the African giant snail Lissachatina fulica (Mollusca: Gastropoda) in Santa Fe de Antioquia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Heredia]]></surname>
<given-names><![CDATA[Nelly Solfania]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ávila]]></surname>
<given-names><![CDATA[Ann Sabrina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velásquez]]></surname>
<given-names><![CDATA[Luz Elena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Antioquia Escuela de Microbiología Grupo de Microbiología Ambiental]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Antioquia Programa de Estudio y Control de Enfermedades Tropicales ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2018</year>
</pub-date>
<volume>38</volume>
<fpage>24</fpage>
<lpage>29</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-41572018000600024&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-41572018000600024&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-41572018000600024&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción. Más de 170 municipios colombianos están invadidos por Lissachatina fulica, caracol africano que puede portar larvas de nematodos de interés en salud humana y veterinaria. Los parásitos entran al caracol huésped intermediario en el estadio de larva L1, y allí cambian a L2 y L3, formas estas capaces de infectar a vertebrados.  Objetivo. Estandarizar el cultivo in vitro de las L3 portadas por especímenes de L. fulica recolectados en Santa Fe de Antioquia.  Materiales y métodos. Entre julio y noviembre de 2014 se recolectaron 10 caracoles, se sacrificaron y se digirieron con ácido clorhídrico al 0,7 %. Las larvas se recuperaron mediante la técnica de Baermann; se cultivaron 36 días en los medios Schneider, mínimo esencial de Eagle modificado por Dulbecco (Dulbecco&#8217;s Modified Eagles Minimal Essential Medium, DMEM), y Roswell Park Memorial Institute (RPMI), con suero fetal bovino (SFB) al 20 % y sin este, y agua destilada con SFB al 20 %. Los medios de cultivo se cambiaron cada 36 horas. Las larvas se midieron con el microscopio utilizando reglilla ocular, y se evaluaron la supervivencia, la longitud y el ancho. Se calcularon datos estadísticos de resumen y se hicieron gráficos de cajas y bigotes, así como la prueba t de Student. El nivel de significación (p) se estableció como menor de 0,05.  Resultados. El 50 % de las larvas sobrevivió, 85 % en DMEM con SFB al 20 %, el 70 % con RPMI más SFB al 20 %, el 60 % en RPMI, el 50 % en Schneider más SFB al 20 %, el 45 % en Schneider y el 40 % en DMEM. El control sobrevivió diez días. Hubo diferencias significativas entre la longitud inicial promedio de las larvas y la longitud final promedio en los medios con suplementos: inicial, 645,83 &#956;m; final en DMEM más SFB al 20 %, 732,65 &#956;m (p&lt;0,001); en RPMI más SFB al 20 %, 718,79 &#956;m (p&lt;0,001), y en Schneider más SFB al 20 %, 696,12 &#956;m (p&lt;0,01). No hubo diferencias significativas entre la anchura inicial promedio, de 24,99 &#956;m, y la final.  Conclusiones. El mejor medio para cultivar las L3 de L. fulica fue el DMEM más SFB al 20 %. En la evaluación del crecimiento larval, la longitud fue más informativa que la anchura. Las larvas estudiadas no correspondieron a Angiostrongylus cantonensis, A. costaricensis ni Aelurostrongylus abstrusus.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Over 170 municipalities in Colombia have been invaded by Lissachatina fulica, an African snail that can carry larvae of nematodes of interest in human and veterinary health. Nematodes enter the host snail as larvae L1 and then change to L2 and L3, the infectious form for vertebrates.  Objective: To standardize culture in vitro of L3 carried by L. fulica from Santa Fe de Antioquia.  Materials and methods: Between July and November, 2014, 10 snails were collected, killed, and conserved with HCl 0.7%. Larvae were recovered using the Baermann technique and cultured for 36 days in Schneider, DMEM and RPMI media, with and without SFB 20% and distilled water with SFB 20%. Replacements were made every 36 hours; larvae were measured with an ocular micrometer on a microscope. Summary statistics were estimated; box and whisker plots were made; the t Student test was performed in SPSS 18&#8482;. A p-value below 0.05 was assumed as significant.  Results: Fifty per cent of the larvae survived. The highest survival and growth was 85% in supplemented DMEM. The final average length of larvae in supplemented media exceeded the initial one. There were significant differences between the average length of larvae cultured in supplemented media and the initial length. The initial width of larvae did not change.  Conclusions: The best medium for the culture of L3 larvae was supplemented DMEM. The length provided more information than the width for the larval growth evaluation. The larvae studied did not correspond to Angiostrongylus cantonensis, A. costaricensis or Aelurostrongylus abstrusus.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[nematodos]]></kwd>
<kwd lng="es"><![CDATA[caracoles]]></kwd>
<kwd lng="es"><![CDATA[medios de cultivo]]></kwd>
<kwd lng="es"><![CDATA[técnicas in vitro]]></kwd>
<kwd lng="es"><![CDATA[Colombia]]></kwd>
<kwd lng="en"><![CDATA[Nematoda]]></kwd>
<kwd lng="en"><![CDATA[snails]]></kwd>
<kwd lng="en"><![CDATA[culture media]]></kwd>
<kwd lng="en"><![CDATA[in vitro techniques]]></kwd>
<kwd lng="en"><![CDATA[Colombia.]]></kwd>
</kwd-group>
</article-meta>
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