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Castanheira GV, Amato VS, Tuon FF, Dantas LR, de Carvalho SFG, Vieira TM, Moura APV, de Sousa Lima Lopes JM, Johanson GH, Emori CT, de Souza RM. High detection rate of parasitic load by qPCR targeting 18S rDNA in blood of patients with active leishmaniasis lesions. Eur J Clin Microbiol Infect Dis 2025:10.1007/s10096-025-05037-4. [PMID: 39808375 DOI: 10.1007/s10096-025-05037-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2024] [Accepted: 01/08/2025] [Indexed: 01/16/2025]
Abstract
This study aimed to standardize qPCR techniques using these molecular markers kDNA and 18S rDNA across three sample types: peripheral blood, guanidine-treated blood, and tissue. The secondary objective is to evaluate the performance of 18S rDNA target in samples from 46 patients with confirmed tegumentary leishmaniasis. After obtaining the standard curve from reference strains with Leishmania, qPCR curves were standardizations and the Cts results of the patient samples were described using abstract measures. Specific specification equations (EEG) with normal distribution and identity link function were constructed to compare each type of clinical sample. To identify the differences among samples and techniques, multiple comparisons with Bonferroni post-test was performed. The kDNA and 18S rDNA demonstrated high sensitivity, detecting as few as 10⁻1 parasites/mL. However, 18S rDNA showed limited species discrimination. qPCR performance was evaluated using blood and tissue samples, showing a sensitivity of 54.2% in blood, 12.5% in guanidine-treated blood, and 86.4% in tissue. qPCR agreement with the 18S rDNA target with the three types of samples, positive and negative, in relation to screening were 56.2% in blood, 31.8% in guanidine- blood and tissue 78.6%. As for true positives (PPV), tissue samples presented a probability percentage of individuals being sick of 86.4%, while in blood it was 81.3%. The results underscore the importance of molecular diagnostics in blood samples, improving the accuracy and monitoring of tegumentary leishmaniasis.
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Affiliation(s)
- Gabriel Victor Castanheira
- Faculdade de Medicina, Departamento de Infectologia E Medicina Tropical, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Valdir Sabbaga Amato
- Faculdade de Medicina, Departamento de Infectologia E Medicina Tropical, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Felipe Francisco Tuon
- Laboratório de Doenças Infecciosas E Emergentes, Pontifícia Universidade Católica Do Paraná, Rua Imaculada Conceição 1155, Curitiba, PR, 80215-901, Brazil.
| | - Letícia Ramos Dantas
- Laboratório de Doenças Infecciosas E Emergentes, Pontifícia Universidade Católica Do Paraná, Rua Imaculada Conceição 1155, Curitiba, PR, 80215-901, Brazil
| | - Silvio Fernando Guimarães de Carvalho
- Departamento Saúde da Mulher E da Criança, Universidade Estadual de Montes Claros, Montes Claros, Minas Gerais, Brazil
- Universidade Estadual de Montes Claros, Programa de Pós-Graduação Em Ciências da Saúde, Montes Claros, Minas Gerais, Brazil
| | - Thallyta Maria Vieira
- Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Montes Claros, Minas Gerais, Brazil
- Universidade Estadual de Montes Claros, Programa de Pós-Graduação Em Ciências da Saúde, Montes Claros, Minas Gerais, Brazil
| | - Ana Paula Venuto Moura
- Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Montes Claros, Minas Gerais, Brazil
- Universidade Estadual de Montes Claros, Programa de Pós-Graduação Em Ciências da Saúde, Montes Claros, Minas Gerais, Brazil
| | | | - Gustavo Henrique Johanson
- Faculdade de Medicina, Departamento de Infectologia E Medicina Tropical, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Christini Takemi Emori
- Faculdade de Medicina, Departamento de Infectologia E Medicina Tropical, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Regina Maia de Souza
- Faculdade de Medicina, Laboratório de Parasitologia, Instituto de Medicina Tropical, Universidade de São Paulo, São Paulo, Brazil
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Brandão ARJ, Moctezuma EIG, de Oliveira Júnior EF, Ortiz JV, de Sousa DRT, Couceiro KDN, Ferreira JMBB, E Silva MRHDS, Doria SS, da Silva LPR, Petruccelli KCS, da Silva MRS, João FM, de Guerra JA, Guerra MDGVB. Reactivation of cutaneous leishmaniasis after kidney transplantation in the Brazilian Amazon: a case report. Int J Dermatol 2024; 63:664-667. [PMID: 38251730 DOI: 10.1111/ijd.17043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 12/27/2023] [Accepted: 01/09/2024] [Indexed: 01/23/2024]
Affiliation(s)
- Alba R J Brandão
- Amazonas State University (UEA), Stricto Sensu Post Graduate Program, Manaus, Brazil
- The Federal University of Amazonas (UFAM), Manaus, Brazil
| | - Elsa I G Moctezuma
- Amazonas State University (UEA), Stricto Sensu Post Graduate Program, Manaus, Brazil
| | | | - Jessica V Ortiz
- Amazonas State University (UEA), Stricto Sensu Post Graduate Program, Manaus, Brazil
| | - Débora R T de Sousa
- Amazonas State University (UEA), Stricto Sensu Post Graduate Program, Manaus, Brazil
| | - Kátia do N Couceiro
- Amazonas State University (UEA), Stricto Sensu Post Graduate Program, Manaus, Brazil
| | - João M B B Ferreira
- Amazonas State University (UEA), Stricto Sensu Post Graduate Program, Manaus, Brazil
| | | | - Susan S Doria
- Amazonas State University (UEA), Stricto Sensu Post Graduate Program, Manaus, Brazil
| | - Lucely P R da Silva
- Amazonas State University (UEA), Stricto Sensu Post Graduate Program, Manaus, Brazil
| | | | - Márcia R S da Silva
- Amazonas State University (UEA), Stricto Sensu Post Graduate Program, Manaus, Brazil
| | - Francisco M João
- Amazonas State University (UEA), Stricto Sensu Post Graduate Program, Manaus, Brazil
| | - Jorge A de Guerra
- Amazonas State University (UEA), Stricto Sensu Post Graduate Program, Manaus, Brazil
- Doctor Heitor Vieira Dourado Tropical Medicine Foundation (FMT-HVD), Manaus, Brazil
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Colomba C, Boncori G, Albano C, Garbo V, Bagarello S, Condemi A, Giordano S, Cascio A. Mucosal Relapse of Visceral Leishmaniasis in a Child with SARS-CoV-2 Infection. Pathogens 2023; 12:1127. [PMID: 37764934 PMCID: PMC10536868 DOI: 10.3390/pathogens12091127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/29/2023] [Accepted: 09/02/2023] [Indexed: 09/29/2023] Open
Abstract
Leishmaniasis is a vector-borne disease caused by protozoan parasites of the genus Leishmania and is transmitted through the bite of infected female sandflies. In the Mediterranean region, visceral leishmaniasis is caused by Leishmania. infantum, and it is usually responsible for symptoms such as fever, pancytopenia and enlargement of the liver and spleen. Relapse is rare in immunocompetent patients as much as the mucous involvement. We present a rare case of mucosal relapse of visceral leishmaniasis in a child with SARS-CoV-2 infection and perform an extensive review of the literature about leishmaniasis relapses in children. Atypical mucosal involvement during Leishmaniasis relapse is an eventuality in pediatric patients. Clinical follow-up and periodic PCR tests must be considered essential for the early recognition and treatment of an eventual relapse.
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Affiliation(s)
- Claudia Colomba
- Department of Health Promotion, Maternal and Infant Care, Internal Medicine and Medical Specialties, University of Palermo, 90100 Palermo, Italy; (C.C.); (G.B.); (V.G.); (S.B.); (A.C.); (A.C.)
- Division of Pediatric Infectious Diseases, “G. Di Cristina” Hospital, ARNAS Civico Di Cristina Benfratelli, 90100 Palermo, Italy;
| | - Giovanni Boncori
- Department of Health Promotion, Maternal and Infant Care, Internal Medicine and Medical Specialties, University of Palermo, 90100 Palermo, Italy; (C.C.); (G.B.); (V.G.); (S.B.); (A.C.); (A.C.)
| | - Chiara Albano
- Department of Health Promotion, Maternal and Infant Care, Internal Medicine and Medical Specialties, University of Palermo, 90100 Palermo, Italy; (C.C.); (G.B.); (V.G.); (S.B.); (A.C.); (A.C.)
| | - Valeria Garbo
- Department of Health Promotion, Maternal and Infant Care, Internal Medicine and Medical Specialties, University of Palermo, 90100 Palermo, Italy; (C.C.); (G.B.); (V.G.); (S.B.); (A.C.); (A.C.)
| | - Sara Bagarello
- Department of Health Promotion, Maternal and Infant Care, Internal Medicine and Medical Specialties, University of Palermo, 90100 Palermo, Italy; (C.C.); (G.B.); (V.G.); (S.B.); (A.C.); (A.C.)
| | - Anna Condemi
- Department of Health Promotion, Maternal and Infant Care, Internal Medicine and Medical Specialties, University of Palermo, 90100 Palermo, Italy; (C.C.); (G.B.); (V.G.); (S.B.); (A.C.); (A.C.)
| | - Salvatore Giordano
- Division of Pediatric Infectious Diseases, “G. Di Cristina” Hospital, ARNAS Civico Di Cristina Benfratelli, 90100 Palermo, Italy;
| | - Antonio Cascio
- Department of Health Promotion, Maternal and Infant Care, Internal Medicine and Medical Specialties, University of Palermo, 90100 Palermo, Italy; (C.C.); (G.B.); (V.G.); (S.B.); (A.C.); (A.C.)
- Infectious and Tropical Diseases Unit, AOU Policlinico “P. Giaccone”, 90100 Palermo, Italy
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Morgado FN, Conceição-Silva F, Pimentel MIF, Porrozzi R. Advancement in Leishmaniasis Diagnosis and Therapeutics. Trop Med Infect Dis 2023; 8:tropicalmed8050270. [PMID: 37235318 DOI: 10.3390/tropicalmed8050270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 05/04/2023] [Indexed: 05/28/2023] Open
Abstract
Leishmaniasis is a complex of clinical manifestations that affects thousands of people in the world each year according to WHO [...].
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Affiliation(s)
- Fernanda N Morgado
- Laboratório de Imunoparasitologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21041-250, Brazil
| | - Fátima Conceição-Silva
- Laboratório de Imunoparasitologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21041-250, Brazil
| | - Maria Inês F Pimentel
- Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil
| | - Renato Porrozzi
- Laboratório de Protozoologia, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21041-250, Brazil
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