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dc.contributor.authorGutiérrez Bermón, Karen Juliana.-
dc.date.accessioned2026-11-09T16:55:54Z-
dc.date.available2025-
dc.date.available2026-11-09T16:55:54Z-
dc.date.issued2025-
dc.identifier.citationGutiérrez Bermón, K. J. (2025). Descripción de lesiones y estandarización de una técnica molecular para el diagnóstico de Flavobacterium psychrophilum en trucha arcoíris (Oncorhynchus mykiss) [Trabajo de Grado Pregrado, Universidad de Pamplona]. Repositorio Hulago Universidad de Pamplona. https://repositoriodspace.unipamplona.edu.co/jspui/handle/20.500.12744/12316es_CO
dc.identifier.urihttps://repositoriodspace.unipamplona.edu.co/jspui/handle/20.500.12744/12316-
dc.descriptionFlavobacterium psychrophilum es una bacteria que afecta salmónidos y otras especies piscícolas incluyendo la trucha arcoíris (Oncorhynchus mykiss), causando la enfermedad bacteriana del agua fría (BCWD), caracterizada por lesiones dérmicas, exoftalmia, palidez branquial e incluso deformidades a nivel esquelético como escoliosis. En este estudio, se describen las lesiones compatibles con Flavobacterium spp y las pruebas iniciales para la estandarización de una prueba de PCR para la detección molecular de F. psychrophilum a partir de 33 muestras de tejido provenientes de ejemplares de truchícolas de Mutiscua y Pamplona. Inicialmente se evaluaron dos componentes diferentes para los tampones de lisis (urea y SDS) utilizados en la extracción de ADN, observando que el buffer con urea obtuvo mayores concentraciones de ADN, aunque presentó limitaciones durante la extracción con fenol-cloroformo debido a la inversión de fases causada por su elevada densidad. Se realizó una PCR anidada usando como cebadores externos 20F/1500R que amplifican una secuencia ribosomal 16S y como cebadores internos PSY1/PSY2, específicos para determinar F. psycrophilum optimizando la temperatura de anillamiento (Tm) a 55 °C, con la cual se obtuvo mejores resultados en cuanto a especificidad de amplificación. Adicionalmente, se desarrolló una PCR sobre muestras de bacterias aisladas en campo, encontrado solo amplificaciones de los genes ribosomales. Este trabajo representa un primer acercamiento y un importante aporte a la obtención de un método molecular para el diagnóstico de la enfermedad del agua fría que es un problema importante en las explotaciones truchícolas de la región.es_CO
dc.description.abstractFlavobacterium psychrophilum is a bacterium that affects salmonids and other fish species, including rainbow trout (Oncorhynchus mykiss), causing bacterial cold water disease (BCWD), characterized by skin lesions, exophthalmos, gill paleness, and even skeletal deformities such as scoliosis. This study describes lesions consistent with Flavobacterium spp. and the initial tests for standardizing a PCR assay for the molecular detection of F. psychrophilum from 33 tissue samples obtained from rainbow trout in Mutiscua and Pamplona. Two different components were initially evaluated for the lysis buffers (urea and SDS) used in DNA extraction. The urea buffer yielded higher DNA concentrations, although it presented limitations during phenol-chloroform extraction due to phase inversion caused by its high density. A nested PCR was performed using as external primers the 20F/1500R primers, which amplify a 16S ribosomal sequence, and the PSY1/PSY2 as internal primers, specific for detecting F. psychrophilum. The annealing temperature (Tm) was optimized at 55°C, which yielded the best results in terms of amplification specificity. Additionally, a PCR was performed on samples of bacteria isolated in the field, revealing amplifications only of ribosomal genes. This work represents a first step and an important contribution to obtaining a molecular method for diagnosing cold-water disease, a significant problem in trout farms in the region.es_CO
dc.format.extent61es_CO
dc.format.mimetypeapplication/pdfes_CO
dc.language.isoeses_CO
dc.publisherUniversidad de Pamplona - Facultad de Ciencias Agrarias.es_CO
dc.subjectEstandarización.es_CO
dc.subjectFenol-cloroformo.es_CO
dc.subjectUlceras.es_CO
dc.subjectCebadores.es_CO
dc.subjectPCR anidada.es_CO
dc.titleDescripción de lesiones y estandarización de una técnica molecular para el diagnóstico de Flavobacterium psychrophilum en trucha arcoíris (Oncorhynchus mykiss).es_CO
dc.typehttp://purl.org/coar/resource_type/c_7a1fes_CO
dc.date.accepted2025-
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