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Besuschio SA, Picado A, Muñoz-Calderón A, Wehrendt DP, Fernández M, Benatar A, Diaz-Bello Z, Irurtia C, Cruz I, Ndung’u JM, Cafferata ML, Montenegro G, Sosa Estani S, Lucero RH, Alarcón de Noya B, Longhi SA, Schijman AG. Trypanosoma cruzi loop-mediated isothermal amplification (Trypanosoma cruzi Loopamp) kit for detection of congenital, acute and Chagas disease reactivation. PLoS Negl Trop Dis 2020; 14:e0008402. [PMID: 32797041 PMCID: PMC7458301 DOI: 10.1371/journal.pntd.0008402] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 08/31/2020] [Accepted: 05/20/2020] [Indexed: 12/15/2022] Open
Abstract
A Trypanosoma cruzi Loopamp kit was recently developed as a ready-to-use diagnostic method requiring minimal laboratory facilities. We evaluated its diagnostic accuracy for detection of acute Chagas disease (CD) in different epidemiological and clinical scenarios. In this retrospective study, a convenience series of clinical samples (venous blood treated with EDTA or different stabilizer agents, heel-prick blood in filter paper or cerebrospinal fluid samples (CSF)) from 30 infants born to seropositive mothers (13 with congenital CD and 17 noninfected), four recipients of organs from CD donors, six orally-infected cases after consumption of contaminated guava juice and six CD patients coinfected with HIV at risk of CD reactivation (N = 46 patients, 46 blood samples and 1 CSF sample) were tested by T. cruzi Loopamp kit (Tc LAMP) and standardized quantitative real-time PCR (qPCR). T. cruzi Loopamp accuracy was estimated using the case definition in the different groups as a reference. Cohen's kappa coefficient (κ) was applied to measure the agreement between Tc LAMP (index test) and qPCR (reference test). Sensitivity and specificity of T. cruzi Loopamp kit in blood samples from the pooled clinical groups was 93% (95% CI: 77-99) and 100% (95% CI: 80-100) respectively. The agreement between Tc LAMP and qPCR was almost perfect (κ = 0.92, 95% CI: 0.62-1.00). The T. cruzi Loopamp kit was sensitive and specific for detection of T. cruzi infection. It was carried out from DNA extracted from peripheral blood samples (via frozen EDTA blood, guanidine hydrochloride-EDTA blood, DNAgard blood and dried blood spots), as well as in CSF specimens infected with TcI or TcII/V/VI parasite populations. The T. cruzi Loopamp kit appears potentially useful for rapid detection of T. cruzi infection in congenital, acute and CD reactivation due to HIV infection.
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Affiliation(s)
- Susana A. Besuschio
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr Héctor Torres”, (INGEBI-CONICET), Buenos Aires, Argentina
| | - Albert Picado
- Foundation for Innovative New Diagnostics (FIND), Geneva, Switzerland
| | - Arturo Muñoz-Calderón
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr Héctor Torres”, (INGEBI-CONICET), Buenos Aires, Argentina
| | - Diana P Wehrendt
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr Héctor Torres”, (INGEBI-CONICET), Buenos Aires, Argentina
| | - Marisa Fernández
- Hospital de Enfermedades Infecciosas “Dr. Francisco J. Muñiz” Buenos Aires, Argentina
- Instituto Nacional de Parasitología, “Dr Mario Fatala Chabén”, ANLIS CG Malbrán, Buenos Aires, Argentina
| | - Alejandro Benatar
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr Héctor Torres”, (INGEBI-CONICET), Buenos Aires, Argentina
| | - Zoraida Diaz-Bello
- Instituto de Medicina Tropical, Universidad Central de Venezuela, Caracas, Venezuela 5
| | - Cecilia Irurtia
- Hospital Nacional “Profesor Alejandro Posadas”, Villa Sarmiento, Buenos Aires, Argentina
| | - Israel Cruz
- Foundation for Innovative New Diagnostics (FIND), Geneva, Switzerland
- National School of Public Health, Instituto de Salud Carlos III, Madrid, Spain
| | - Joseph M Ndung’u
- Foundation for Innovative New Diagnostics (FIND), Geneva, Switzerland
| | - María L Cafferata
- Departamento en Salud de la Madre y el Niño, Instituto de Efectividad Clínica y Sanitaria – Centro de Investigación en Epidemiología y Salud Pública (IECS-CIESP), Buenos Aires, Argentina
| | - Graciela Montenegro
- Hospital Nacional “Profesor Alejandro Posadas”, Villa Sarmiento, Buenos Aires, Argentina
| | - Sergio Sosa Estani
- Instituto Nacional de Parasitología, “Dr Mario Fatala Chabén”, ANLIS CG Malbrán, Buenos Aires, Argentina
| | - Raúl H. Lucero
- Área de Biología Molecular, Instituto de Medicina Regional, Universidad Nacional del Nordeste, Resistencia, Argentina
| | | | - Silvia A Longhi
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr Héctor Torres”, (INGEBI-CONICET), Buenos Aires, Argentina
| | - Alejandro G Schijman
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr Héctor Torres”, (INGEBI-CONICET), Buenos Aires, Argentina
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Cura CI, Duffy T, Lucero RH, Bisio M, Péneau J, Jimenez-Coello M, Calabuig E, Gimenez MJ, Valencia Ayala E, Kjos SA, Santalla J, Mahaney SM, Cayo NM, Nagel C, Barcán L, Málaga Machaca ES, Acosta Viana KY, Brutus L, Ocampo SB, Aznar C, Cuba Cuba CA, Gürtler RE, Ramsey JM, Ribeiro I, VandeBerg JL, Yadon ZE, Osuna A, Schijman AG. Multiplex Real-Time PCR Assay Using TaqMan Probes for the Identification of Trypanosoma cruzi DTUs in Biological and Clinical Samples. PLoS Negl Trop Dis 2015; 9:e0003765. [PMID: 25993316 PMCID: PMC4437652 DOI: 10.1371/journal.pntd.0003765] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 04/16/2015] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Trypanosoma cruzi has been classified into six Discrete Typing Units (DTUs), designated as TcI-TcVI. In order to effectively use this standardized nomenclature, a reproducible genotyping strategy is imperative. Several typing schemes have been developed with variable levels of complexity, selectivity and analytical sensitivity. Most of them can be only applied to cultured stocks. In this context, we aimed to develop a multiplex Real-Time PCR method to identify the six T. cruzi DTUs using TaqMan probes (MTq-PCR). METHODS/PRINCIPAL FINDINGS The MTq-PCR has been evaluated in 39 cultured stocks and 307 biological samples from vectors, reservoirs and patients from different geographical regions and transmission cycles in comparison with a multi-locus conventional PCR algorithm. The MTq-PCR was inclusive for laboratory stocks and natural isolates and sensitive for direct typing of different biological samples from vectors, reservoirs and patients with acute, congenital infection or Chagas reactivation. The first round SL-IR MTq-PCR detected 1 fg DNA/reaction tube of TcI, TcII and TcIII and 1 pg DNA/reaction tube of TcIV, TcV and TcVI reference strains. The MTq-PCR was able to characterize DTUs in 83% of triatomine and 96% of reservoir samples that had been typed by conventional PCR methods. Regarding clinical samples, 100% of those derived from acute infected patients, 62.5% from congenitally infected children and 50% from patients with clinical reactivation could be genotyped. Sensitivity for direct typing of blood samples from chronic Chagas disease patients (32.8% from asymptomatic and 22.2% from symptomatic patients) and mixed infections was lower than that of the conventional PCR algorithm. CONCLUSIONS/SIGNIFICANCE Typing is resolved after a single or a second round of Real-Time PCR, depending on the DTU. This format reduces carryover contamination and is amenable to quantification, automation and kit production.
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Affiliation(s)
- Carolina I. Cura
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres”—INGEBI-CONICET, Buenos Aires, Argentina
| | - Tomas Duffy
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres”—INGEBI-CONICET, Buenos Aires, Argentina
| | - Raúl H. Lucero
- Instituto de Medicina Regional, Universidad Nacional del Nordeste, Resistencia, Chaco, Argentina
| | - Margarita Bisio
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres”—INGEBI-CONICET, Buenos Aires, Argentina
| | - Julie Péneau
- Laboratoire Hospitalier et Universitaire-CH Andrée Rosemon, Cayenne, French Guiana, France
| | - Matilde Jimenez-Coello
- Laboratorio Biología Celular, Centro de Investigaciones Regionales “Dr. Hideyo Noguchi”, Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico
| | - Eva Calabuig
- Servicio de Medicina Interna, Hospital Politécnico LA FE, Valencia, Spain
| | - María J. Gimenez
- Servicio de Microbiología, Hospital Universitario y Politécnico LA FE, Valencia, Spain
| | - Edward Valencia Ayala
- Laboratorio de Investigación en Enfermedades Infecciosas, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Sonia A. Kjos
- Department of Biology, University of Minnesota Duluth, Duluth, Minnesota, United States of America
| | - José Santalla
- Laboratorio de Parasitología, Instituto Nacional de Laboratorios en Salud, Ministerio de Salud y Deportes de Bolivia, La Paz, Bolivia
| | - Susan M. Mahaney
- Southwest National Primate Research Center and Department of Genetics, Texas Biomedical Research Institute, San Antonio, Texas, United States of America
| | - Nelly M. Cayo
- Instituto de Biología de la Altura, Universidad Nacional de Jujuy, Jujuy, Argentina
| | - Claudia Nagel
- Epidemiología e Infectología Clínica, Hospital Universitario Fundación Favaloro, Buenos Aires, Argentina
| | - Laura Barcán
- Sección Infectología, Servicio de Clínica Médica, Hospital Italiano, Buenos Aires, Argentina
| | - Edith S. Málaga Machaca
- Laboratorio de Investigación en Enfermedades Infecciosas, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Karla Y. Acosta Viana
- Laboratorio Biología Celular, Centro de Investigaciones Regionales “Dr. Hideyo Noguchi”, Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico
| | - Laurent Brutus
- Institut de Recherche pour le Développement and University Paris Descartes, UMR 216, Mother and Child Facing Tropical Diseases, Paris, France
| | - Susana B. Ocampo
- Instituto de Biología de la Altura, Universidad Nacional de Jujuy, Jujuy, Argentina
| | - Christine Aznar
- Laboratoire Hospitalier et Universitaire-CH Andrée Rosemon, Cayenne, French Guiana, France
| | - Cesar A. Cuba Cuba
- Parasitologia Médica e Biologia de Vetores, Área de Patologia, Faculdade de Medicina, Universidade de Brasilia, Brasilia DF, Brazil
| | - Ricardo E. Gürtler
- Laboratorio de Eco-Epidemiología, Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Janine M. Ramsey
- Centro Regional de Investigación en Salud Pública, Instituto Nacional de Salud Pública, Tapachula, Chiapas, Mexico
| | - Isabela Ribeiro
- Drugs and Neglected Diseases Initiative, Genève, Switzerland
| | - John L. VandeBerg
- Southwest National Primate Research Center and Department of Genetics, Texas Biomedical Research Institute, San Antonio, Texas, United States of America
| | - Zaida E. Yadon
- Pan American Health Organization (PAHO), World Health Organization (WHO), Washington, D.C., United States of America
| | - Antonio Osuna
- Institute of Biotechnology, Molecular Parasitology Group, University of Granada, Granada, Spain
| | - Alejandro G. Schijman
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres”—INGEBI-CONICET, Buenos Aires, Argentina
- * E-mail:
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Deluca GD, Basiletti J, González JV, Díaz Vásquez N, Lucero RH, Picconi MA. Human papilloma virus risk factors for infection and genotype distribution in aboriginal women from Northern Argentina. Medicina (B Aires) 2012; 72:461-466. [PMID: 23241287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
The mortality rate for cervical cancer (CC) in Northern Argentina is three times higher than the average for the country (7.8 deaths/100,000 women). We determined the prevalence and genotype distribution of human papillomavirus (HPV) in 227 sexually active women of the native Pilagá community in Formosa, Argentina. We also conducted an HPV-16 variant analysis and studied several community factors that might play a role in viral entry and infection. Endo and exocervical samples were tested for HPV DNA with MY09/11-PCR or with GP5+/6+-PCR. HPV was detected in 46.7% of the samples and 21 different types were found; the most frequent being HPV-16 (19.4%), -6 and -18 (5.3%), -58 (3.5%) and -31 and -33 (3.1%). In relation to HPV-16 variants, 68.2% were European and 31.8% Asian-American. Among the cofactors analyzed only disposal of hu man excreta to the open air (P=0.01) was significantly associated with HPV infection. Our prevalence estimates clearly show that Pilagá women are highly exposed to or infected with high risk HPV types and therefore are at a high risk of developing precancerous lesions and eventually CC at the population level.
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Affiliation(s)
- Gerardo D Deluca
- Facultad de Medicina, Universidad Nacional del Nordeste, Corrientes, Argentina.
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