Optimization and validation of LAMP technique for the detection of leptospiral DNA
- Autores
- Hamer, Micaela; Saraullo, Vanina Rosa; Esteban, Micaela; Sanchez, Maria Cristina; Brihuega, Bibiana Felicitas; Martinez, Mara Leila
- Año de publicación
- 2024
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- Poster
Leptospira spp. is the second most important abortifacient pathogen in livestock pro duction in Argentina, responsible for the loss of millions of dollars in the beef and dairy industry in the Pampas region (Cantón et al., 2022). It is crucial to have diagnostic tools that allow simple and effective detection of the agent, in order to implement neces sary measures to prevent spread of the pathogen and mitigate economic and public health consequences. The aim of this study was to develop a method for detecting leptospiral DNA based on loop-mediated isothermal amplification (LAMP) technique, designed for application in low-complexity laboratories: Lepto-LAMP. Molecular target of Lepto-LAMP was rrs gene (koizumi et al., 2012). After optimization, Lepto-LAMP in corporated calcein as an indicator and presented high analytical sensitivity (10 pg of DNA per reaction, or 0.1; 1 and 10 leptospires/mL in bovine serum, urine, and kidney macerate, respectively). Lepto-LAMP specifically detected DNA from pathogenic and intermediate strains of Leptospira spp. In a trial using hamsters (Mesocricetus auratus) as a model of animal leptospirosis, Lepto-LAMP allowed for the detection of a greater number of positive samples in infected animals compared with end-point PCR lipL32. Both molecular diagnostic techniques showed substantial agreement according to Cohen’s kappa coefficient. Employing clinical samples (serum, urine, and organs) from domestic and wild animals, Lepto-LAMP demonstrated high diagnostic sensitivity (100%, 95% CI:93.6–100%) and high diagnostic specificity (96.6%, 95% CI: 95.2–97.7%). Lepto-LAMP had a lower implementation cost compared to the end-point PCR, mak ing it more accessible for low-complexity laboratories. The use of Lepto-LAMP for the diagnosis of animal leptospirosis has great potential to complement the microscopic agglutination test (MAT) as it can be implemented in most non-specialized laborato ries and provides a short time to obtain results (between 75–90 minutes from DNA extraction to final result reading).
Instituto de Patobiología
Fil: Hamer, Micaela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina
Fil: Hamer, Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Saraullo, Vanina Rosa. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina
Fil: Saraullo, Vanina Rosa. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Esteban, Micaela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina
Fil: Esteban, Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Sanchez, Maria Cristina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina
Fil: Sanchez, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Brihuega, Bibiana Felicitas. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina
Fil: Brihuega, Bibiana Felicitas. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Brihuega, Bibiana Felicitas. Universidad del Salvador. Facultad de Ciencias Agrarias y Veterinarias. Instituto de Investigación en Veterinaria; Argentina
Fil: Martinez, Mara Leila. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina
Fil: Martinez, Mara Leila. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Martinez, Mara Leila. Universidad del Salvador. Facultad de Ciencias Agrarias y Veterinarias. Instituto de Investigación en Veterinaria; Argentina - Fuente
- The 13th Conference of the International Leptospirosis Society and The 4th Meeting of the European Leptospirosis and other Roden-Born Haemorrhagic fevers Society, Brussels, 2-4 September 2024
- Materia
-
Diagnostic Techniques
Leptospirosis
DNA
Técnica de Diagnóstico
ADN
Mesocricetus auratus
PCR - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Instituto Nacional de Tecnología Agropecuaria
- OAI Identificador
- oai:localhost:20.500.12123/20486
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Optimization and validation of LAMP technique for the detection of leptospiral DNAHamer, MicaelaSaraullo, Vanina RosaEsteban, MicaelaSanchez, Maria CristinaBrihuega, Bibiana FelicitasMartinez, Mara LeilaDiagnostic TechniquesLeptospirosisDNATécnica de DiagnósticoADNMesocricetus auratusPCRPosterLeptospira spp. is the second most important abortifacient pathogen in livestock pro duction in Argentina, responsible for the loss of millions of dollars in the beef and dairy industry in the Pampas region (Cantón et al., 2022). It is crucial to have diagnostic tools that allow simple and effective detection of the agent, in order to implement neces sary measures to prevent spread of the pathogen and mitigate economic and public health consequences. The aim of this study was to develop a method for detecting leptospiral DNA based on loop-mediated isothermal amplification (LAMP) technique, designed for application in low-complexity laboratories: Lepto-LAMP. Molecular target of Lepto-LAMP was rrs gene (koizumi et al., 2012). After optimization, Lepto-LAMP in corporated calcein as an indicator and presented high analytical sensitivity (10 pg of DNA per reaction, or 0.1; 1 and 10 leptospires/mL in bovine serum, urine, and kidney macerate, respectively). Lepto-LAMP specifically detected DNA from pathogenic and intermediate strains of Leptospira spp. In a trial using hamsters (Mesocricetus auratus) as a model of animal leptospirosis, Lepto-LAMP allowed for the detection of a greater number of positive samples in infected animals compared with end-point PCR lipL32. Both molecular diagnostic techniques showed substantial agreement according to Cohen’s kappa coefficient. Employing clinical samples (serum, urine, and organs) from domestic and wild animals, Lepto-LAMP demonstrated high diagnostic sensitivity (100%, 95% CI:93.6–100%) and high diagnostic specificity (96.6%, 95% CI: 95.2–97.7%). Lepto-LAMP had a lower implementation cost compared to the end-point PCR, mak ing it more accessible for low-complexity laboratories. The use of Lepto-LAMP for the diagnosis of animal leptospirosis has great potential to complement the microscopic agglutination test (MAT) as it can be implemented in most non-specialized laborato ries and provides a short time to obtain results (between 75–90 minutes from DNA extraction to final result reading).Instituto de PatobiologíaFil: Hamer, Micaela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; ArgentinaFil: Hamer, Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Saraullo, Vanina Rosa. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; ArgentinaFil: Saraullo, Vanina Rosa. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Esteban, Micaela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; ArgentinaFil: Esteban, Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Sanchez, Maria Cristina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; ArgentinaFil: Sanchez, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Brihuega, Bibiana Felicitas. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; ArgentinaFil: Brihuega, Bibiana Felicitas. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Brihuega, Bibiana Felicitas. Universidad del Salvador. Facultad de Ciencias Agrarias y Veterinarias. Instituto de Investigación en Veterinaria; ArgentinaFil: Martinez, Mara Leila. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; ArgentinaFil: Martinez, Mara Leila. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Martinez, Mara Leila. Universidad del Salvador. Facultad de Ciencias Agrarias y Veterinarias. Instituto de Investigación en Veterinaria; ArgentinaInternational Leptospirosis Society2024-12-05T11:23:13Z2024-12-05T11:23:13Z2024-09info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfhttp://hdl.handle.net/20.500.12123/20486The 13th Conference of the International Leptospirosis Society and The 4th Meeting of the European Leptospirosis and other Roden-Born Haemorrhagic fevers Society, Brussels, 2-4 September 2024reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2025-09-29T13:47:00Zoai:localhost:20.500.12123/20486instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:47:00.341INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse |
dc.title.none.fl_str_mv |
Optimization and validation of LAMP technique for the detection of leptospiral DNA |
title |
Optimization and validation of LAMP technique for the detection of leptospiral DNA |
spellingShingle |
Optimization and validation of LAMP technique for the detection of leptospiral DNA Hamer, Micaela Diagnostic Techniques Leptospirosis DNA Técnica de Diagnóstico ADN Mesocricetus auratus PCR |
title_short |
Optimization and validation of LAMP technique for the detection of leptospiral DNA |
title_full |
Optimization and validation of LAMP technique for the detection of leptospiral DNA |
title_fullStr |
Optimization and validation of LAMP technique for the detection of leptospiral DNA |
title_full_unstemmed |
Optimization and validation of LAMP technique for the detection of leptospiral DNA |
title_sort |
Optimization and validation of LAMP technique for the detection of leptospiral DNA |
dc.creator.none.fl_str_mv |
Hamer, Micaela Saraullo, Vanina Rosa Esteban, Micaela Sanchez, Maria Cristina Brihuega, Bibiana Felicitas Martinez, Mara Leila |
author |
Hamer, Micaela |
author_facet |
Hamer, Micaela Saraullo, Vanina Rosa Esteban, Micaela Sanchez, Maria Cristina Brihuega, Bibiana Felicitas Martinez, Mara Leila |
author_role |
author |
author2 |
Saraullo, Vanina Rosa Esteban, Micaela Sanchez, Maria Cristina Brihuega, Bibiana Felicitas Martinez, Mara Leila |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Diagnostic Techniques Leptospirosis DNA Técnica de Diagnóstico ADN Mesocricetus auratus PCR |
topic |
Diagnostic Techniques Leptospirosis DNA Técnica de Diagnóstico ADN Mesocricetus auratus PCR |
dc.description.none.fl_txt_mv |
Poster Leptospira spp. is the second most important abortifacient pathogen in livestock pro duction in Argentina, responsible for the loss of millions of dollars in the beef and dairy industry in the Pampas region (Cantón et al., 2022). It is crucial to have diagnostic tools that allow simple and effective detection of the agent, in order to implement neces sary measures to prevent spread of the pathogen and mitigate economic and public health consequences. The aim of this study was to develop a method for detecting leptospiral DNA based on loop-mediated isothermal amplification (LAMP) technique, designed for application in low-complexity laboratories: Lepto-LAMP. Molecular target of Lepto-LAMP was rrs gene (koizumi et al., 2012). After optimization, Lepto-LAMP in corporated calcein as an indicator and presented high analytical sensitivity (10 pg of DNA per reaction, or 0.1; 1 and 10 leptospires/mL in bovine serum, urine, and kidney macerate, respectively). Lepto-LAMP specifically detected DNA from pathogenic and intermediate strains of Leptospira spp. In a trial using hamsters (Mesocricetus auratus) as a model of animal leptospirosis, Lepto-LAMP allowed for the detection of a greater number of positive samples in infected animals compared with end-point PCR lipL32. Both molecular diagnostic techniques showed substantial agreement according to Cohen’s kappa coefficient. Employing clinical samples (serum, urine, and organs) from domestic and wild animals, Lepto-LAMP demonstrated high diagnostic sensitivity (100%, 95% CI:93.6–100%) and high diagnostic specificity (96.6%, 95% CI: 95.2–97.7%). Lepto-LAMP had a lower implementation cost compared to the end-point PCR, mak ing it more accessible for low-complexity laboratories. The use of Lepto-LAMP for the diagnosis of animal leptospirosis has great potential to complement the microscopic agglutination test (MAT) as it can be implemented in most non-specialized laborato ries and provides a short time to obtain results (between 75–90 minutes from DNA extraction to final result reading). Instituto de Patobiología Fil: Hamer, Micaela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina Fil: Hamer, Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Saraullo, Vanina Rosa. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina Fil: Saraullo, Vanina Rosa. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Esteban, Micaela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina Fil: Esteban, Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Sanchez, Maria Cristina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina Fil: Sanchez, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Brihuega, Bibiana Felicitas. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina Fil: Brihuega, Bibiana Felicitas. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Brihuega, Bibiana Felicitas. Universidad del Salvador. Facultad de Ciencias Agrarias y Veterinarias. Instituto de Investigación en Veterinaria; Argentina Fil: Martinez, Mara Leila. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología Veterinaria. Laboratorio de Leptospirosis; Argentina Fil: Martinez, Mara Leila. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Martinez, Mara Leila. Universidad del Salvador. Facultad de Ciencias Agrarias y Veterinarias. Instituto de Investigación en Veterinaria; Argentina |
description |
Poster |
publishDate |
2024 |
dc.date.none.fl_str_mv |
2024-12-05T11:23:13Z 2024-12-05T11:23:13Z 2024-09 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_5794 info:ar-repo/semantics/documentoDeConferencia |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/20.500.12123/20486 |
url |
http://hdl.handle.net/20.500.12123/20486 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
International Leptospirosis Society |
publisher.none.fl_str_mv |
International Leptospirosis Society |
dc.source.none.fl_str_mv |
The 13th Conference of the International Leptospirosis Society and The 4th Meeting of the European Leptospirosis and other Roden-Born Haemorrhagic fevers Society, Brussels, 2-4 September 2024 reponame:INTA Digital (INTA) instname:Instituto Nacional de Tecnología Agropecuaria |
reponame_str |
INTA Digital (INTA) |
collection |
INTA Digital (INTA) |
instname_str |
Instituto Nacional de Tecnología Agropecuaria |
repository.name.fl_str_mv |
INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria |
repository.mail.fl_str_mv |
tripaldi.nicolas@inta.gob.ar |
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