Detección de resistencia a azitromicina en aislamientos de bacilos entericos a partir de muestras orales
dc.contributor.advisor | Neuta Poveda, Yineth | |
dc.contributor.advisor | Catillo, Diana Marcela | |
dc.contributor.advisor | Lafaurie, Gloria | |
dc.contributor.author | Llerena Quinche, Isabella Sofia | |
dc.date.accessioned | 2024-09-04T17:53:04Z | |
dc.date.available | 2024-09-04T17:53:04Z | |
dc.date.issued | 2024-05 | |
dc.description.abstract | Antecedentes: Las enterobacterias forman parte del microbiota normal gastrointestinal, y actúan como microbiota oportunista en la cavidad oral, suelen complicar el tratamiento de enfermedades orales que requieren tratamiento antibiótico debido a la resistencia antibiótica asociada a genes como mph(A). Aunque se reportan bajos niveles de actividad frente a enterobacterias en macrólidos, la azitromicina ha demostrado buen efecto frente a estas. Sin embargo, existen pocos reportes asociados con resistencia a azitromicina en enterobacterias de origen oral. Objetivo: Evaluar la susceptibilidad antibiótica a azitromicina y la presencia del gen mph(A) en bacilos entéricos aislados de cavidad oral. Métodos: Estudio descriptivo observacional en el que se evaluaron 90 aislamientos clínicos de bacilos entéricos provenientes de muestras de saliva almacenadas de pacientes quienes participaron en estudios previos y dieron su consentimiento para utilizar estos microorganismos en investigaciones posteriores. Se realizó identificación bioquímica de géneros y especies utilizando la galería bioquímica Crystal E/NF. Se determinó la susceptibilidad a azitromicina por micro dilución en caldo de acuerdo con los lineamientos el CLSI 2022 utilizando como control la cepa Staphylococcus aureus ATCC 29213, y se evaluó la presencia del gen mph (A) por PCR convencional. Se determinó la frecuencia relativa y absoluta de géneros y especies, y se estableció la MIC50 y MIC90 teniendo en cuenta los puntos de corte reportados por el CLSI 2022. Resultados: Los aislamientos identificados fueron Enterobacter cloacae (27,8%), Klebsiella oxytoca (20%), Serratia marcescens(14,4%), Klebsiella pneumoniae (11,1%), Serratia liquefaciens (6.7%), Enterobacter gergoviae (5,6%) y Klebsiella aerogenes(1,1%). El 21,1% de los aislamientos fueron sensibles, el 32,2% fueron intermedios y el 46,7% fueron resistentes a azitromicina. Las especies más resistentes fueron Klebsiella aerogenes (100%), Klebsiella oxytoca (66,7%), Cronobacter sakazakii (66,7%) y Enterobacter cloacae (52%). Enterobacter gergoviae mostró una alta sensibilidad (60%). Conclusión: Un alto porcentaje de los aislamientos fueron resistentes a la azitromicina, aunque no hubo asociación con el gen mhp (A), lo que sugiere la presencia de otros mecanismos de resistencia que deben investigarse. | |
dc.description.abstractenglish | Background: Enterobacteria are part of the normal gastrointestinal microbiota and act as opportunistic microbiota in the oral cavity, often complicating the treatment of oral diseases that require antibiotic therapy due to antibiotic resistance associated with genes like mph(A). Although macrolides generally show low activity against enterobacteria, azithromycin has demonstrated good efficacy against these bacteria.. However, few reports are associated with azithromycin resistance in enterobacteria of oral origin. Objective: To evaluate the antibiotic susceptibility to azithromycin and the presence of the mph(A) gene in enteric rods isolated from the oral cavity. Methods: This observational descriptive study evaluated 90 clinical isolates of enteric rods from stored saliva samples of patients who participated in previous studies and consented to use these microorganisms in subsequent research. Biochemical genus and species identification were performed using the Crystal E/NF biochemical gallery. Susceptibility to azithromycin was determined by broth microdilution according to CLSI 2022 guidelines, using Staphylococcus aureus ATCC 29213 as the control strain, and the presence of the mph(A) gene was assessed by conventional PCR. The relative and absolute frequencies of genera and species were determined, and MIC50 and MIC90 were established based on CLSI 2022 cutoff points. Results: The isolates were identified as Enterobacter cloacae (27.8%), Klebsiella oxytoca (20%), Serratia marcescens (14.4%), Klebsiella pneumoniae (11.1%), Serratia liquefaciens (6.7%), Enterobacter gergoviae (5.6%) and Klebsiella aerogenes (1.1%). Of the isolates, 21.1% were susceptible to azithromycin, 32.2% were intermediate, and 46.67% were resistant. The most resistant species were Klebsiella aerogenes (100%), Klebsiella oxytoca (66.7%), Cronobacter sakazakii (66.7%) and Enterobacter cloacae (52%). Enterobacter gergoviae showed high sensitivity (60%). Conclusion: Most isolates were resistant to azithromycin, with no association with the mph(A) gene, suggesting the presence of other resistance mechanisms that need to be investigated. | |
dc.description.degreelevel | Pregrado | spa |
dc.description.degreename | Odontólogo | spa |
dc.description.sponsorship | Grupo de investigacion UIBO, Unidad de Investigacion Basica Oral | |
dc.format.mimetype | application/pdf | |
dc.identifier.instname | instname:Universidad El Bosque | spa |
dc.identifier.reponame | reponame:Repositorio Institucional Universidad El Bosque | spa |
dc.identifier.repourl | repourl:https://repositorio.unbosque.edu.co | |
dc.identifier.uri | https://hdl.handle.net/20.500.12495/12942 | |
dc.language.iso | es | |
dc.publisher.faculty | Facultad de Odontología | spa |
dc.publisher.grantor | Universidad El Bosque | spa |
dc.publisher.program | Odontología | spa |
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dc.rights | Atribución-NoComercial-CompartirIgual 4.0 Internacional | en |
dc.rights.accessrights | http:/purl.org/coar/access_right/c_abf2/ | |
dc.rights.accessrights | info:eu-repo/semantics/openAccess | |
dc.rights.local | Acceso abierto | spa |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
dc.subject | Enterobacterias | |
dc.subject | Cavidad oral | |
dc.subject | Azitromicina | |
dc.subject | Resistencia antibiotica | |
dc.subject.keywords | Enterobacteria | |
dc.subject.keywords | Oral cavity | |
dc.subject.keywords | Azitromycin | |
dc.subject.keywords | Antibiotic resistance | |
dc.subject.nlm | WU 100 | |
dc.title | Detección de resistencia a azitromicina en aislamientos de bacilos entericos a partir de muestras orales | |
dc.title.translated | Evaluation of susceptibility to azithromycin in enteric bacilli isolated from the oral cavity | |
dc.type.coar | https://purl.org/coar/resource_type/c_7a1f | |
dc.type.coarversion | https://purl.org/coar/version/c_970fb48d4fbd8a85 | |
dc.type.driver | info:eu-repo/semantics/bachelorThesis | |
dc.type.hasversion | info:eu-repo/semantics/acceptedVersion | |
dc.type.local | Tesis/Trabajo de grado - Monografía - Pregrado | spa |
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