Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina
- Autores
- Almazán, María Cristina; Krolewiecki, Alejandro Javier; Hoyos, Carlos Lorenzo; Cajal, Silvana Pamela; Copa, Noemí Griselda; Fleitas, Pedro Emanuel; Barroso, Paola Andrea; Marco, Jorge Diego; Nasser, Julio Rubén; Gil, José Fernando
- Año de publicación
- 2019
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- Cutaneous leishmaniasis is endemic in the northwestern province of Salta in Argentina. Leishmania DNA from Giemsa-stained slides of up to 12 years in storage of patients from a University based reference center in Oran, Salta was characterized through PCR-Restriction Fragment Length Polymorphism (RFLP). One hundred smears from individuals with suspicious lesions and epidemiologic exposure plus microbiologic confirmation through positive microscopy were analyzed. The samples had been originally taken 2, 3, 5, 6 and 12 years prior to performing PCR-RFLP (20 samples from each year) and were maintained at room temperature in a tropical environment. All the cases were classified in a semiquantitative scale for amastigote density, and Leishmanin skin test (LST) results were included. DNA extraction was done applying lysis buffer with proteinase K, and then DNA was amplified with ribosomal internal transcribed spacer 1(ITS1) primers. PCR products were digested with HaeIII enzyme. All PCR positive smears (74/100) belonged to Viannia subgenus. A statistically significant directly proportional relationship between semiquantitative microscopy and PCR results was detected (p < 0.001). All patients had LST positive results (induration ≥ 5 mm), and the smears of those with positive but smaller induration (LST < 19 mm) had a higher proportion of positive PCR results. This study determined that smear age did not affect PCR positivity, which allows retrospective analyzes and suggests smears might be useful for molecular complementary diagnosis. Since Leishmania (Viannia) braziliensis is the main circulating species in the study area, determining Viannia subgenus in all analyzed samples confirms previous findings. PCR positivity showed statistically significant differences according to semiquantitative microscopy, highlighting the importance of parasite burden in the diagnostic sensitivity of the method. Considering that smears of patients with smaller LST induration were more positive in PCR, a negative smear from patients with positive LST response, but < 19 mm, could actually represent a false negative smear result.
Fil: Almazán, María Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina
Fil: Krolewiecki, Alejandro Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina
Fil: Hoyos, Carlos Lorenzo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina
Fil: Cajal, Silvana Pamela. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina
Fil: Copa, Noemí Griselda. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina
Fil: Fleitas, Pedro Emanuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina
Fil: Barroso, Paola Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina
Fil: Marco, Jorge Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina
Fil: Nasser, Julio Rubén. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina
Fil: Gil, José Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina
67th Annual Meeting American Society of Tropical Medicine & Hygiene
New Orleans
Estados Unidos
American Society of Tropical Medicine & Hygiene - Materia
-
LEISHMANIASIS
GIEMSA-STAINED SLIDES
ORAN
SPECIES IDENTIFICATION - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/161430
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/161430 |
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CONICET Digital (CONICET) |
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Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, ArgentinaAlmazán, María CristinaKrolewiecki, Alejandro JavierHoyos, Carlos LorenzoCajal, Silvana PamelaCopa, Noemí GriseldaFleitas, Pedro EmanuelBarroso, Paola AndreaMarco, Jorge DiegoNasser, Julio RubénGil, José FernandoLEISHMANIASISGIEMSA-STAINED SLIDESORANSPECIES IDENTIFICATIONhttps://purl.org/becyt/ford/3.3https://purl.org/becyt/ford/3Cutaneous leishmaniasis is endemic in the northwestern province of Salta in Argentina. Leishmania DNA from Giemsa-stained slides of up to 12 years in storage of patients from a University based reference center in Oran, Salta was characterized through PCR-Restriction Fragment Length Polymorphism (RFLP). One hundred smears from individuals with suspicious lesions and epidemiologic exposure plus microbiologic confirmation through positive microscopy were analyzed. The samples had been originally taken 2, 3, 5, 6 and 12 years prior to performing PCR-RFLP (20 samples from each year) and were maintained at room temperature in a tropical environment. All the cases were classified in a semiquantitative scale for amastigote density, and Leishmanin skin test (LST) results were included. DNA extraction was done applying lysis buffer with proteinase K, and then DNA was amplified with ribosomal internal transcribed spacer 1(ITS1) primers. PCR products were digested with HaeIII enzyme. All PCR positive smears (74/100) belonged to Viannia subgenus. A statistically significant directly proportional relationship between semiquantitative microscopy and PCR results was detected (p < 0.001). All patients had LST positive results (induration ≥ 5 mm), and the smears of those with positive but smaller induration (LST < 19 mm) had a higher proportion of positive PCR results. This study determined that smear age did not affect PCR positivity, which allows retrospective analyzes and suggests smears might be useful for molecular complementary diagnosis. Since Leishmania (Viannia) braziliensis is the main circulating species in the study area, determining Viannia subgenus in all analyzed samples confirms previous findings. PCR positivity showed statistically significant differences according to semiquantitative microscopy, highlighting the importance of parasite burden in the diagnostic sensitivity of the method. Considering that smears of patients with smaller LST induration were more positive in PCR, a negative smear from patients with positive LST response, but < 19 mm, could actually represent a false negative smear result.Fil: Almazán, María Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; ArgentinaFil: Krolewiecki, Alejandro Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; ArgentinaFil: Hoyos, Carlos Lorenzo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; ArgentinaFil: Cajal, Silvana Pamela. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; ArgentinaFil: Copa, Noemí Griselda. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; ArgentinaFil: Fleitas, Pedro Emanuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; ArgentinaFil: Barroso, Paola Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; ArgentinaFil: Marco, Jorge Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; ArgentinaFil: Nasser, Julio Rubén. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; ArgentinaFil: Gil, José Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina67th Annual Meeting American Society of Tropical Medicine & HygieneNew OrleansEstados UnidosAmerican Society of Tropical Medicine & HygieneAmerican Society of Tropical Medicine & Hygiene2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/161430Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina; 67th Annual Meeting American Society of Tropical Medicine & Hygiene; New Orleans; Estados Unidos; 2018; 441-441CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.astmh.org/annual-meeting/past-meetingsInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:07:08Zoai:ri.conicet.gov.ar:11336/161430instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:07:09.01CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina |
title |
Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina |
spellingShingle |
Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina Almazán, María Cristina LEISHMANIASIS GIEMSA-STAINED SLIDES ORAN SPECIES IDENTIFICATION |
title_short |
Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina |
title_full |
Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina |
title_fullStr |
Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina |
title_full_unstemmed |
Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina |
title_sort |
Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina |
dc.creator.none.fl_str_mv |
Almazán, María Cristina Krolewiecki, Alejandro Javier Hoyos, Carlos Lorenzo Cajal, Silvana Pamela Copa, Noemí Griselda Fleitas, Pedro Emanuel Barroso, Paola Andrea Marco, Jorge Diego Nasser, Julio Rubén Gil, José Fernando |
author |
Almazán, María Cristina |
author_facet |
Almazán, María Cristina Krolewiecki, Alejandro Javier Hoyos, Carlos Lorenzo Cajal, Silvana Pamela Copa, Noemí Griselda Fleitas, Pedro Emanuel Barroso, Paola Andrea Marco, Jorge Diego Nasser, Julio Rubén Gil, José Fernando |
author_role |
author |
author2 |
Krolewiecki, Alejandro Javier Hoyos, Carlos Lorenzo Cajal, Silvana Pamela Copa, Noemí Griselda Fleitas, Pedro Emanuel Barroso, Paola Andrea Marco, Jorge Diego Nasser, Julio Rubén Gil, José Fernando |
author2_role |
author author author author author author author author author |
dc.subject.none.fl_str_mv |
LEISHMANIASIS GIEMSA-STAINED SLIDES ORAN SPECIES IDENTIFICATION |
topic |
LEISHMANIASIS GIEMSA-STAINED SLIDES ORAN SPECIES IDENTIFICATION |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/3.3 https://purl.org/becyt/ford/3 |
dc.description.none.fl_txt_mv |
Cutaneous leishmaniasis is endemic in the northwestern province of Salta in Argentina. Leishmania DNA from Giemsa-stained slides of up to 12 years in storage of patients from a University based reference center in Oran, Salta was characterized through PCR-Restriction Fragment Length Polymorphism (RFLP). One hundred smears from individuals with suspicious lesions and epidemiologic exposure plus microbiologic confirmation through positive microscopy were analyzed. The samples had been originally taken 2, 3, 5, 6 and 12 years prior to performing PCR-RFLP (20 samples from each year) and were maintained at room temperature in a tropical environment. All the cases were classified in a semiquantitative scale for amastigote density, and Leishmanin skin test (LST) results were included. DNA extraction was done applying lysis buffer with proteinase K, and then DNA was amplified with ribosomal internal transcribed spacer 1(ITS1) primers. PCR products were digested with HaeIII enzyme. All PCR positive smears (74/100) belonged to Viannia subgenus. A statistically significant directly proportional relationship between semiquantitative microscopy and PCR results was detected (p < 0.001). All patients had LST positive results (induration ≥ 5 mm), and the smears of those with positive but smaller induration (LST < 19 mm) had a higher proportion of positive PCR results. This study determined that smear age did not affect PCR positivity, which allows retrospective analyzes and suggests smears might be useful for molecular complementary diagnosis. Since Leishmania (Viannia) braziliensis is the main circulating species in the study area, determining Viannia subgenus in all analyzed samples confirms previous findings. PCR positivity showed statistically significant differences according to semiquantitative microscopy, highlighting the importance of parasite burden in the diagnostic sensitivity of the method. Considering that smears of patients with smaller LST induration were more positive in PCR, a negative smear from patients with positive LST response, but < 19 mm, could actually represent a false negative smear result. Fil: Almazán, María Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina Fil: Krolewiecki, Alejandro Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina Fil: Hoyos, Carlos Lorenzo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina Fil: Cajal, Silvana Pamela. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina Fil: Copa, Noemí Griselda. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina Fil: Fleitas, Pedro Emanuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina Fil: Barroso, Paola Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina Fil: Marco, Jorge Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina Fil: Nasser, Julio Rubén. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina Fil: Gil, José Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina. Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales; Argentina 67th Annual Meeting American Society of Tropical Medicine & Hygiene New Orleans Estados Unidos American Society of Tropical Medicine & Hygiene |
description |
Cutaneous leishmaniasis is endemic in the northwestern province of Salta in Argentina. Leishmania DNA from Giemsa-stained slides of up to 12 years in storage of patients from a University based reference center in Oran, Salta was characterized through PCR-Restriction Fragment Length Polymorphism (RFLP). One hundred smears from individuals with suspicious lesions and epidemiologic exposure plus microbiologic confirmation through positive microscopy were analyzed. The samples had been originally taken 2, 3, 5, 6 and 12 years prior to performing PCR-RFLP (20 samples from each year) and were maintained at room temperature in a tropical environment. All the cases were classified in a semiquantitative scale for amastigote density, and Leishmanin skin test (LST) results were included. DNA extraction was done applying lysis buffer with proteinase K, and then DNA was amplified with ribosomal internal transcribed spacer 1(ITS1) primers. PCR products were digested with HaeIII enzyme. All PCR positive smears (74/100) belonged to Viannia subgenus. A statistically significant directly proportional relationship between semiquantitative microscopy and PCR results was detected (p < 0.001). All patients had LST positive results (induration ≥ 5 mm), and the smears of those with positive but smaller induration (LST < 19 mm) had a higher proportion of positive PCR results. This study determined that smear age did not affect PCR positivity, which allows retrospective analyzes and suggests smears might be useful for molecular complementary diagnosis. Since Leishmania (Viannia) braziliensis is the main circulating species in the study area, determining Viannia subgenus in all analyzed samples confirms previous findings. PCR positivity showed statistically significant differences according to semiquantitative microscopy, highlighting the importance of parasite burden in the diagnostic sensitivity of the method. Considering that smears of patients with smaller LST induration were more positive in PCR, a negative smear from patients with positive LST response, but < 19 mm, could actually represent a false negative smear result. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/conferenceObject Reunión Book http://purl.org/coar/resource_type/c_5794 info:ar-repo/semantics/documentoDeConferencia |
status_str |
publishedVersion |
format |
conferenceObject |
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http://hdl.handle.net/11336/161430 Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina; 67th Annual Meeting American Society of Tropical Medicine & Hygiene; New Orleans; Estados Unidos; 2018; 441-441 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/161430 |
identifier_str_mv |
Molecular characterization of Leishmania DNA from archived giemsa-stained slides of patients from Salta, Argentina; 67th Annual Meeting American Society of Tropical Medicine & Hygiene; New Orleans; Estados Unidos; 2018; 441-441 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
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info:eu-repo/semantics/altIdentifier/url/https://www.astmh.org/annual-meeting/past-meetings |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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openAccess |
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https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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application/pdf application/pdf application/pdf |
dc.coverage.none.fl_str_mv |
Internacional |
dc.publisher.none.fl_str_mv |
American Society of Tropical Medicine & Hygiene |
publisher.none.fl_str_mv |
American Society of Tropical Medicine & Hygiene |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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