<?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>2448-5691</journal-id>
<journal-title><![CDATA[Mundo nano. Revista interdisciplinaria en nanociencias y nanotecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Mundo nano]]></abbrev-journal-title>
<issn>2448-5691</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias Aplicadas y Tecnología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-56912025000100005</article-id>
<article-id pub-id-type="doi">10.22201/ceiich.24485691e.2025.34.69835</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Nanopartículas de subsalicilato de bismuto por ablación láser: efecto contra bacterias asociadas con infecciones nosocomiales]]></article-title>
<article-title xml:lang="en"><![CDATA[Bismuth subsalicylate nanoparticles by laser ablation: effect against bacteria associated with nosocomial infections]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Carmona]]></surname>
<given-names><![CDATA[Lorena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Prado-Prone]]></surname>
<given-names><![CDATA[Gina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camps]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almaguer-Flores]]></surname>
<given-names><![CDATA[Argelia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Odontología Laboratorio de Biointerfases]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Nucleares Departamento de Física ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<volume>18</volume>
<numero>34</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-56912025000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-56912025000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-56912025000100005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Objetivo: evaluar el efecto antibacteriano de nanopartículas de subsalicilato de bismuto (NPs-SSBi) en contra de cuatro bacterias frecuentemente asociadas con infecciones nosocomiales. Métodos: las NPs-SSBi fueron obtenidas en suspensión coloidal por ablación láser de sólidos en líquidos (ALSL). El tamaño, composición y estabilidad de las NPs en suspensión se analizó por microscopía electrónica de transmisión y espectroscopía ultravioleta-visible. El crecimiento planctónico y la formación de biopelícula de dos bacterias Gram-positivas, S. aureus y S. epidermidis, y dos Gram-negativas, E. coli y P. aeruginosa, después de ser expuestas a diferentes concentraciones de NPs-SSBi (1.25 a 90 &#956;g/mL), se evaluó por ensayos de turbidez y XTT, respectivamente. Resultados: se obtuvieron NPs-SSBi cristalinas de forma cuasi-esférica, con un tamaño de 4.5 ± 0.14 nm, las cuales permanecen estables en suspensión coloidal por al menos 21 días. Las NPs-SSBi inhibieron el crecimiento de las cuatro bacterias, el crecimiento planctónico se redujo &#8776;80-92% a concentraciones por arriba de 40 &#956;L/mL, y la formación de biopelícula &#8776;73-89% a concentraciones de 80 y 90 &#956;L/mL. Conclusiones: las NPs-SSBi obtenidas por ALSL inhibieron el crecimiento de cuatro importantes bacterias nosocomiales, por lo cual podrían ser utilizadas para el control de infecciones asociadas con la atención a la salud.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Objective: to evaluate the antibacterial effect of bismuth subsalicylate nanoparticles (NPs-SSBi) against four bacteria, frequently associated with nosocomial infections. Methods: the NPs-SSBi were obtained in colloidal suspension by laser ablation of solids in liquids (ALSL). The size, composition, and stability of the NPs in suspension were analyzed by transmission electron microscopy and ultraviolet-visible spectroscopy. The planktonic growth and biofilm formation of two Gram-positive bacteria, S. aureus and S. epidermidis, and two Gram-negative bacteria, E. coli and P. aeruginosa, after exposure to different concentrations of NPs-SSBi (1.25 to 90 &#956;g/mL), were evaluated by turbidity and XTT assays, respectively. Results: quasi-spherical crystalline NPs-SSBi were obtained, with a size of 4.5 ± 0.14 nm, which remain stable in colloidal suspension for at least 21 days. The NPs-SSBi inhibited the growth of all four bacteria, planktonic growth was reduced &#8776;80-92% at concentrations above 40 &#956;L/mL, and biofilm formation &#8776;73-89% at concentrations of 80 and 90 &#956;L/mL. Conclusions: the NPs-SSBi obtained by ALSL inhibited the growth of four important nosocomial bacteria, so they could be used for the control of health care-associated infections.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[bismuth subsalicylate]]></kwd>
<kwd lng="en"><![CDATA[laser ablation]]></kwd>
<kwd lng="en"><![CDATA[antibacterial]]></kwd>
<kwd lng="en"><![CDATA[nosocomial bacteria]]></kwd>
<kwd lng="es"><![CDATA[subsalicilato de bismuto]]></kwd>
<kwd lng="es"><![CDATA[ablación láser]]></kwd>
<kwd lng="es"><![CDATA[antibacteriano]]></kwd>
<kwd lng="es"><![CDATA[bacterias nosocomiales]]></kwd>
</kwd-group>
</article-meta>
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