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Regina de Oliveira T, Oliveira Leite TH, Miranda WN, Manuli ER, Leal F, Sabino E, Pott-Junior H, Melendez M, Faria RC. Molecular test for COVID-19 diagnosis based on a colorimetric genomagnetic assay. Anal Chim Acta 2023; 1257:341167. [PMID: 37062564 PMCID: PMC10066033 DOI: 10.1016/j.aca.2023.341167] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 03/10/2023] [Accepted: 03/30/2023] [Indexed: 04/03/2023]
Abstract
The world is in a long pandemic period caused by the SARS-CoV-2 virus and massive diagnostic tests to assist efforts to control the spread of the disease and also to avoid new coronavirus variants are still needed. Herein, we propose a simple and accurate saliva-based colorimetric test for the diagnosis of COVID-19. Magnetic beads (MBs) modified with a sequence of single-strand DNA (ssDNA) complementary to the N gene of the SARS-CoV-2 RNA were developed and used for magnetic capture and separation from a complex saliva sample. A second biotinylated ssDNA sequence was applied, and the colorimetric detection was carried out by adding streptavidin-horseradish peroxidase conjugate, H2O2, and tetramethylbenzidine (TMB) as chromogenic substrate. The test does not require viral RNA isolation, transcription, or amplification steps and can be performed at room temperature. The molecular assay test can be run using 96-well microplates, allowing the diagnosis of a large number of samples in 90 min. A simple support for magnets was designed and constructed using a 3D printer that allows the magnetic separations directly in the 96-well microplate. The colorimetric test showed an excellent ability to discriminate between healthy individuals and patients infected with SARS-CoV-2, with 92% and 100% of clinical sensitivity and specificity, respectively. This performance was similar to that achieved using the gold standard RT-PCR technique. The proposed genomagnetic assay offers an opportunity to greatly increase population testing, contribute to controlling the spread of the virus, and improve health equity in testing for COVID-19.
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Affiliation(s)
| | | | - Wyllian Neves Miranda
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil
| | - Erika Regina Manuli
- Municipal University of São Caetano do Sul, São Caetano do Sul, SP, 09521-160, Brazil
| | - Fábio Leal
- Municipal University of São Caetano do Sul, São Caetano do Sul, SP, 09521-160, Brazil
| | - Ester Sabino
- Institute of Tropical Medicine, University of São Paulo, São Paulo, SP, 05403-000, Brazil
| | - Henrique Pott-Junior
- Department of Medicine, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil
| | - Matias Melendez
- Cloning Solutions Ltda, Barretos, SP, 14780-459, Brazil; Molecular Carcinogenesis Program, National Cancer Institute, Rio de Janeiro, RJ, 20231-050, Brazil
| | - Ronaldo Censi Faria
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil.
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Ferreira GM, Claro IM, Grosche VR, Cândido D, José DP, Rocha EC, de Moura Coletti T, Manuli ER, Gaburo N, Faria NR, Sabino EC, de Jesus JG, Jardim ACG. Molecular characterization and sequecing analysis of SARS-CoV-2 genome in Minas Gerais, Brazil. Biologicals 2022; 80:43-52. [PMID: 36175304 PMCID: PMC9436897 DOI: 10.1016/j.biologicals.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 06/14/2022] [Accepted: 08/21/2022] [Indexed: 11/05/2022] Open
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), first identified in Wuhan, China, is the causative agent of the coronavirus disease 2019 (COVID-19). Since its first notification in São Paulo state (SP) on 26th February 2020, more than 22,300,000 cases and 619,000 deaths were reported in Brazil. In early pandemic, SARS-CoV-2 spread locally, however, over time, this virus was disseminated to other regions of the country. Herein, we performed genomic sequencing and phylogenetic analysis of SARS-CoV-2 using 20 clinical samples of COVID-19 confirmed cases from 9 cities of Minas Gerais state (MG), in order to evaluate the molecular properties of circulating viral strains in this locality from March to May 2020. Our analyses demonstrated the circulation of B.1 lineage isolates in the investigated locations and nucleotide substitutions were observed into the genomic regions related to important viral structures. Additionally, sequences generated in this study clustered with isolates from SP, suggesting a dissemination route between these two states. Alternatively, monophyletic groups of sequences from MG and other states or country were observed, indicating independent events of virus introduction. These results reinforce the need of genomic surveillance for understand the ongoing spread of emerging viral pathogens.
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Affiliation(s)
| | - Ingra Morales Claro
- Institute of Tropical Medicine, University of São Paulo Medical School, São Paulo, Brazil; Department of Infectious and Parasitic Diseases, University of São Paulo Medical School, São Paulo, Brazil
| | - Victória Riquena Grosche
- Institute of Biomedical Science, Federal University of Uberlândia, Uberlândia, MG, Brazil; Institute of Bioscience, Humanities and Exact Sciences, São Paulo State University, São José do Rio Preto, São Paulo, Brazil
| | - Darlan Cândido
- Institute of Tropical Medicine, University of São Paulo Medical School, São Paulo, Brazil; Department of Zoology, University of Oxford, Oxford, UK
| | | | - Esmenia Coelho Rocha
- Institute of Tropical Medicine, University of São Paulo Medical School, São Paulo, Brazil; Department of Infectious and Parasitic Diseases, University of São Paulo Medical School, São Paulo, Brazil
| | - Thaís de Moura Coletti
- Institute of Tropical Medicine, University of São Paulo Medical School, São Paulo, Brazil; Department of Infectious and Parasitic Diseases, University of São Paulo Medical School, São Paulo, Brazil
| | - Erika Regina Manuli
- Institute of Tropical Medicine, University of São Paulo Medical School, São Paulo, Brazil; Department of Infectious and Parasitic Diseases, University of São Paulo Medical School, São Paulo, Brazil
| | | | - Nuno Rodrigues Faria
- Institute of Tropical Medicine, University of São Paulo Medical School, São Paulo, Brazil; Department of Zoology, University of Oxford, Oxford, UK; MCR Centre for Global Infectious Disease Analysis, J-IDEA, Imperial College London, London, UK
| | - Ester Cerdeira Sabino
- Institute of Tropical Medicine, University of São Paulo Medical School, São Paulo, Brazil; Department of Infectious and Parasitic Diseases, University of São Paulo Medical School, São Paulo, Brazil
| | - Jaqueline Goes de Jesus
- Institute of Tropical Medicine, University of São Paulo Medical School, São Paulo, Brazil; Department of Infectious and Parasitic Diseases, University of São Paulo Medical School, São Paulo, Brazil
| | - Ana Carolina Gomes Jardim
- Institute of Biomedical Science, Federal University of Uberlândia, Uberlândia, MG, Brazil; Institute of Bioscience, Humanities and Exact Sciences, São Paulo State University, São José do Rio Preto, São Paulo, Brazil.
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Villas-Boas LS, Paula AVD, Silva ARD, Paiao HGO, Tozetto-Mendoza TR, Manuli ER, Leal FE, Ferraz ADBC, Sabino EC, Bierrenbach AL, Witkin SS, Mendes-Correa MC. Absence of neutralizing antibodies against the Omicron SARS-CoV-2 variant in convalescent sera from individuals infected with the ancestral SARS-CoV-2 virus or its Gamma variant. Clinics (Sao Paulo) 2022; 77:100068. [PMID: 35767900 PMCID: PMC9212906 DOI: 10.1016/j.clinsp.2022.100068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 05/23/2022] [Accepted: 06/06/2022] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVES The aim of the present study was to evaluate if neutralizing antibody responses induced by infection with the SARS-CoV-2 strain that was dominant at the beginning of the pandemic or by the Gamma variant was effective against the Omicron variant. METHODS Convalescent sera from 109 individuals, never exposed to a SARS-CoV-2 vaccine, who had mild or moderate symptoms not requiring hospitalization following either a documented SARS-CoV-2 ancestral strain infection or a Gamma variant infection, were assayed for in vitro neutralizing antibody activity against their original strains and the Omicron variant. RESULTS Following an infection with the ancestral strain, 56 (93.3%), 45 (77.6%) and 1 (1.7%) serum sample were positive for neutralizing antibodies against the ancestral, Gamma variant, and Omicron variant, respectively. After infection with the Gamma variant, 43 (87.8%) and 2 (4.1%) sera were positive for neutralizing antibodies against the Gamma and Omicron variants, respectively. CONCLUSIONS Neutralizing antibodies generated following mild or moderate infection with the SARS-CoV-2 ancestral strain or the Gamma variant are not protective against the Omicron variant.
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Affiliation(s)
- Lucy Santos Villas-Boas
- Instituto de Medicina Tropical de Sao Paulo, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, SP, Brazil; Departamento de Moléstias Infecciosas e Parasitarias da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Anderson Vicente de Paula
- Instituto de Medicina Tropical de Sao Paulo, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, SP, Brazil; Departamento de Moléstias Infecciosas e Parasitarias da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Almir Ribeiro da Silva
- Instituto de Medicina Tropical de Sao Paulo, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, SP, Brazil; Departamento de Moléstias Infecciosas e Parasitarias da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Heuder Gustavo Oliveira Paiao
- Instituto de Medicina Tropical de Sao Paulo, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, SP, Brazil; Departamento de Moléstias Infecciosas e Parasitarias da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Tania Regina Tozetto-Mendoza
- Instituto de Medicina Tropical de Sao Paulo, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, SP, Brazil; Departamento de Moléstias Infecciosas e Parasitarias da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Erika Regina Manuli
- Instituto de Medicina Tropical de Sao Paulo, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, SP, Brazil; Faculdade de Medicina da Universidade Municipal de Sao Caetano do Sul, São Caetano, SP, Brazil
| | - Fábio Eudes Leal
- Faculdade de Medicina da Universidade Municipal de Sao Caetano do Sul, São Caetano, SP, Brazil
| | | | - Ester Cerdeira Sabino
- Instituto de Medicina Tropical de Sao Paulo, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, SP, Brazil; Departamento de Moléstias Infecciosas e Parasitarias da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil; Faculdade de Medicina da Universidade Municipal de Sao Caetano do Sul, São Caetano, SP, Brazil
| | | | - Steven Sol Witkin
- Instituto de Medicina Tropical de Sao Paulo, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, SP, Brazil; Weill Cornell Medicine, USA
| | - Maria Cassia Mendes-Correa
- Instituto de Medicina Tropical de Sao Paulo, Faculdade de Medicina da Universidade de Sao Paulo, São Paulo, SP, Brazil; Departamento de Moléstias Infecciosas e Parasitarias da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil.
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4
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Oliveira BA, Oliveira LCD, Oliveira FMD, Pereira GM, Souza RMD, Manuli ER, Marchini FK, Espinoza EPS, Park M, Taniguchi L, Mendes PV, Franco LAM, Nastri AC, Oliveira MSD, Vieira Junior JM, Kallas EG, Levin AS, Sabino EC, Costa SF. Evaluation of eleven immunochromatographic assays for SARS-CoV-2 detection: investigating the dengue cross-reaction. Rev Inst Med Trop Sao Paulo 2022; 64:e63. [PMID: 36197424 PMCID: PMC9528753 DOI: 10.1590/s1678-9946202264063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 07/15/2022] [Indexed: 11/22/2022] Open
Abstract
COVID-19 disease is spread worldwide and diagnostic techniques have been studied in order to contain the pandemic. Immunochromatographic (IC) assays are feasible and a low-cost alternative especially in low and middle-income countries, which lack structure to perform certain diagnostic techniques. Here we evaluate the sensitivity and specificity of eleven different IC tests in 145 serum samples from confirmed cases of COVID-19 using RT-PCR and 100 negative serum samples from blood donors collected in February 2019. We also evaluated the cross-reactivity with dengue using 20 serum samples from patients with confirmed diagnosis for dengue collected in early 2019 through four different tests. We found high sensitivity (92%), specificity (100%) and an almost perfect agreement (Kappa 0.92) of IC assay, especially when we evaluated IgG and IgM combined after 10 days from the onset of symptoms with RT-PCR. However, we detected cross-reactivity between dengue and COVID-19 mainly with IgM antibodies (5 to 20% of cross-reaction) and demonstrated the need for better studies about diagnostic techniques for these diseases.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Marcelo Park
- Universidade de São Paulo, Brazil; Hospital Sírio Libanês, Brazil
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5
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Kobayashi GS, Brito LA, Moreira DDP, Suzuki AM, Hsia GSP, Pimentel LF, de Paiva APB, Dias CR, Lourenço NCV, Oliveira BA, Manuli ER, Corral MA, Cavaçana N, Mitne-Neto M, Sales MM, Dell’ Aquila LP, Filho AR, Parrillo EF, Mendes-Corrêa MC, Sabino EC, Costa SF, Leal FE, Sgro GG, Farah CS, Zatz M, Passos-Bueno MR. A Novel Saliva RT-LAMP Workflow for Rapid Identification of COVID-19 Cases and Restraining Viral Spread. Diagnostics (Basel) 2021; 11:1400. [PMID: 34441334 PMCID: PMC8391450 DOI: 10.3390/diagnostics11081400] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/25/2021] [Accepted: 07/16/2021] [Indexed: 12/19/2022] Open
Abstract
Rapid diagnostics is pivotal to curb SARS-CoV-2 transmission, and saliva has emerged as a practical alternative to naso/oropharyngeal (NOP) specimens. We aimed to develop a direct RT-LAMP (reverse transcription loop-mediated isothermal amplification) workflow for viral detection in saliva, and to provide more information regarding its potential in curbing COVID-19 transmission. Clinical and contrived specimens were used to optimize formulations and sample processing protocols. Salivary viral load was determined in symptomatic patients to evaluate the clinical performance of the test and to characterize saliva based on age, gender and time from onset of symptoms. Our workflow achieved an overall sensitivity of 77.2% (n = 90), with 93.2% sensitivity, 97% specificity, and 0.895 Kappa for specimens containing >102 copies/μL (n = 77). Further analyses in saliva showed that viral load peaks in the first days of symptoms and decreases afterwards, and that viral load is ~10 times lower in females compared to males, and declines following symptom onset. NOP RT-PCR data did not yield relevant associations. This work suggests that saliva reflects the transmission dynamics better than NOP specimens, and reveals gender differences that may reflect higher transmission by males. This saliva RT-LAMP workflow can be applied to track viral spread and, to maximize detection, testing should be performed immediately after symptoms are presented, especially in females.
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Affiliation(s)
- Gerson Shigeru Kobayashi
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Luciano Abreu Brito
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Danielle de Paula Moreira
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Angela May Suzuki
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Gabriella Shih Ping Hsia
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Lylyan Fragoso Pimentel
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Ana Paula Barreto de Paiva
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Carolina Regoli Dias
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Naila Cristina Vilaça Lourenço
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Beatriz Araujo Oliveira
- Instituto de Medicina Tropical, Universidade de São Paulo (USP), São Paulo 05403-000, Brazil; (B.A.O.); (E.R.M.); (M.C.M.-C.); (E.C.S.); (S.F.C.)
| | - Erika Regina Manuli
- Instituto de Medicina Tropical, Universidade de São Paulo (USP), São Paulo 05403-000, Brazil; (B.A.O.); (E.R.M.); (M.C.M.-C.); (E.C.S.); (S.F.C.)
| | - Marcelo Andreetta Corral
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Natale Cavaçana
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Miguel Mitne-Neto
- Grupo Fleury, Research and Development, São Paulo 04344-070, Brazil;
| | - Maria Mirtes Sales
- Instituto de Ensino e Pesquisa Prevent Senior, São Paulo 04547-100, Brazil; (M.M.S.); (L.P.D.A.); (A.R.F.); (E.F.P.)
| | - Luiz Phellipe Dell’ Aquila
- Instituto de Ensino e Pesquisa Prevent Senior, São Paulo 04547-100, Brazil; (M.M.S.); (L.P.D.A.); (A.R.F.); (E.F.P.)
| | - Alvaro Razuk Filho
- Instituto de Ensino e Pesquisa Prevent Senior, São Paulo 04547-100, Brazil; (M.M.S.); (L.P.D.A.); (A.R.F.); (E.F.P.)
| | - Eduardo Fagundes Parrillo
- Instituto de Ensino e Pesquisa Prevent Senior, São Paulo 04547-100, Brazil; (M.M.S.); (L.P.D.A.); (A.R.F.); (E.F.P.)
| | - Maria Cássia Mendes-Corrêa
- Instituto de Medicina Tropical, Universidade de São Paulo (USP), São Paulo 05403-000, Brazil; (B.A.O.); (E.R.M.); (M.C.M.-C.); (E.C.S.); (S.F.C.)
| | - Ester Cerdeira Sabino
- Instituto de Medicina Tropical, Universidade de São Paulo (USP), São Paulo 05403-000, Brazil; (B.A.O.); (E.R.M.); (M.C.M.-C.); (E.C.S.); (S.F.C.)
| | - Silvia Figueiredo Costa
- Instituto de Medicina Tropical, Universidade de São Paulo (USP), São Paulo 05403-000, Brazil; (B.A.O.); (E.R.M.); (M.C.M.-C.); (E.C.S.); (S.F.C.)
| | - Fabio Eudes Leal
- Faculdade de Medicina, Universidade Municipal de São Caetano do Sul (USCS), São Paulo 09521-160, Brazil;
| | - Germán Gustavo Sgro
- Instituto de Química, Universidade de São Paulo (USP), São Paulo 05508-000, Brazil; (G.G.S.); (C.S.F.)
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14040-903, Brazil
| | - Chuck Shaker Farah
- Instituto de Química, Universidade de São Paulo (USP), São Paulo 05508-000, Brazil; (G.G.S.); (C.S.F.)
| | - Mayana Zatz
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
| | - Maria Rita Passos-Bueno
- Centro de Pesquisa Sobre o Genoma Humano e Células-Tronco (HUG-CELL), Instituto de Biociências, Universidade de São Paulo (USP), São Paulo 05508-090, Brazil; (L.A.B.); (D.d.P.M.); (A.M.S.); (G.S.P.H.); (L.F.P.); (A.P.B.d.P.); (C.R.D.); (N.C.V.L.); (M.A.C.); (N.C.); (M.Z.)
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de Oliveira LC, Pereira NB, Moreira CHV, Bierrenbach AL, Salles FC, de Souza-Basqueira M, Manuli ER, Ferreira AM, Oliveira CDL, Cardoso CS, Ribeiro ALP, Sabino EC. ELISA Saliva for Trypanosoma cruzi Antibody Detection: An Alternative for Serological Surveys in Endemic Regions. Am J Trop Med Hyg 2020; 102:800-803. [PMID: 32100675 PMCID: PMC7124906 DOI: 10.4269/ajtmh.18-0330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 01/17/2020] [Indexed: 11/07/2022] Open
Abstract
Chagas is a neglected disease endemic in Latin America. Vector transmission control had been aggressively performed. Recent entomological surveillance in Brazil has revealed natural infection rates ranging from 0.40% to 0.52%. Although serological surveys are complex to develop, they are important for disease control. In this study, we validated the use of saliva in ELISA commercial kits with a cohort of 100 patients with Chagas disease followed at Hospital das Clinicas in São Paulo, Brazil, and 50 healthy controls. Five ELISA kits for detecting antibodies against Trypanosoma cruzi were tested. The best discrimination between Chagas patients and controls was observed with the Wiener kit, which yielded a sensitivity of 97% and a specificity of 100%. Our findings reveal that the use of saliva may be an alternative to large-scale screening surveys in detecting T. cruzi antibodies; it is a noninvasive sample collection method potentially key to large-scale screening in children.
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Affiliation(s)
- Léa Campos de Oliveira
- LIM03, Hospital das Clínicas, Medical School, University of São Paulo, São Paulo, Brazil
| | | | | | | | | | | | | | | | | | | | - Antonio Luiz P. Ribeiro
- Hospital das Clínicas and School of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Jesus JGD, Sacchi C, Candido DDS, Claro IM, Sales FCS, Manuli ER, Silva DBBD, Paiva TMD, Pinho MAB, Santos KCDO, Hill SC, Aguiar RS, Romero F, Santos FCPD, Gonçalves CR, Timenetsky MDC, Quick J, Croda JHR, Oliveira WD, Rambaut A, Pybus OG, Loman NJ, Sabino EC, Faria NR. Importation and early local transmission of COVID-19 in Brazil, 2020. Rev Inst Med Trop Sao Paulo 2020; 62:e30. [PMID: 32401959 PMCID: PMC7232955 DOI: 10.1590/s1678-9946202062030] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 04/22/2020] [Indexed: 11/26/2022] Open
Abstract
We conducted the genome sequencing and analysis of the first confirmed COVID-19 infections in Brazil. Rapid sequencing coupled with phylogenetic analyses in the context of travel history corroborate multiple independent importations from Italy and local spread during the initial stage of COVID-19 transmission in Brazil.
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Affiliation(s)
- Jaqueline Goes de Jesus
- Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Claudio Sacchi
- Laboratório Estratégico, Instituto Adolfo Lutz, São Paulo, São Paulo, Brazil
| | | | - Ingra Morales Claro
- Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | | | - Erika Regina Manuli
- Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | | | | | | | | | | | | | - Filipe Romero
- Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro,, Brazil
| | | | | | | | - Joshua Quick
- University of Birmingham, Birmingham, United Kingdom
| | - Julio Henrique Rosa Croda
- Coordenação Geral de Laboratórios de Saúde Pública, Secretaria de Vigilância em Saúde, Ministério da Saúde, Brasília, DF, Brazil.,Universidade Federal da Grande Dourados, Laboratório de Pesquisa em Ciências da Saúde, Dourados, Mato Grosso do Sul, Brazil,Fundação Osvaldo Cruz Campo Grande, Mato Grosso do Sul, Brazil
| | - Wanderson de Oliveira
- Coordenação Geral de Laboratórios de Saúde Pública, Secretaria de Vigilância em Saúde, Ministério da Saúde, Brasília, DF, Brazil
| | - Andrew Rambaut
- University of Edinburgh, Institute of Evolutionary Biology, Edinburgh, United Kingdom
| | - Oliver G. Pybus
- Department of Zoology, University of Oxford, Oxford, United Kingdom
| | | | - Ester Cerdeira Sabino
- Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Nuno Rodrigues Faria
- Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, São Paulo, São Paulo, Brazil.,Department of Zoology, University of Oxford, Oxford, United Kingdom.,Imperial College, School of Public Health, Department of Infectious Disease Epidemiology, London, United Kingdom
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8
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Avelino-Silva VI, Alvarenga C, Abreu C, Tozetto-Mendoza TR, Canto CLMD, Manuli ER, Mendes-Correa MC, Sabino EC, Figueiredo WM, Segurado AC, Mayaud P. Potential effect of Zika virus infection on human male fertility? Rev Inst Med Trop Sao Paulo 2018; 60:e64. [PMID: 30379231 PMCID: PMC6201741 DOI: 10.1590/s1678-9946201860064] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 10/03/2018] [Indexed: 01/06/2023] Open
Abstract
Background: Zika virus (ZIKV) sexual transmission and prolonged viral shedding in semen
have been previously reported, suggesting a strong viral affinity for
genital tissues. A transient impact of ZIKV on male fertility was shown in
animal and human studies. Methods: Adult male patients with confirmed ZIKV infection diagnosed in the city of
Araraquara, Brazil during the epidemic season of 2016 were invited one year
after the acute infection to respond to a questionnaire of genital symptoms
and to provide a semen sample for molecular ZIKV testing and spermogram
analysis, as well as a serum sample for hormonal testing. Results: 101 of 187 tested patients had positive ZIKV RT-PCR in plasma and/or urine
samples (54%, 72 women and 29 men). Of 15 adult male participants for whom
telephone contact was successful, 14 responded to the questionnaire of
genital symptoms and six consented to provide a semen sample at a median of
12 months after the acute infection. We report abnormal spermogram results
from patients one year after confirmed ZIKV infection. Conclusions: Our findings suggest a possible long-term detrimental effect of ZIKV
infection on human male fertility that has to be further explored in
well-characterized samples from cohort studies conducted in ZIKV-endemic
areas.
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Affiliation(s)
- Vivian Iida Avelino-Silva
- Universidade de São Paulo, Faculdade de Medicina, Departamento de Moléstias Infecciosas e Parasitárias, São Paulo, São Paulo, Brazil
| | | | | | | | | | - Erika Regina Manuli
- Universidade de São Paulo, Instituto de Medicina Tropical de São Paulo, São Paulo, São Paulo, Brazil
| | | | - Ester Cerdeira Sabino
- Universidade de São Paulo, Instituto de Medicina Tropical de São Paulo, São Paulo, São Paulo, Brazil
| | | | - Aluísio Cotrim Segurado
- Universidade de São Paulo, Faculdade de Medicina, Departamento de Moléstias Infecciosas e Parasitárias, São Paulo, São Paulo, Brazil
| | - Philippe Mayaud
- London School of Hygiene and Tropical Medicine, London, England
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Del Negro GMB, Delgado AF, Manuli ER, Yamamoto L, Okay TS. Dual candidemia detected by nested polymerase chain reaction in two critically ill children. Med Mycol 2010; 48:1116-20. [PMID: 20662631 DOI: 10.3109/13693786.2010.499375] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The use of improved microbiological procedures associated with molecular techniques has increased the identification of Candida bloodstream infections, even if the isolation of more than one species by culture methods remains uncommon. We report the cases of two children presenting with severe gastrointestinal disorders and other risk factors that contribute to Candida infections. In the first patient, C. albicans DNA was initially detected by a nested-amplification and C. tropicalis was found later during hospitalization, while blood cultures were persistently negative. In the second child, there was amplification of C. albicans and C. glabrata DNA in the same samples, but blood cultures yielded only C. albicans. Both patients received antifungal therapy but had unfavorable outcomes. These two cases illustrate that PCR was more successful than culture methods in detecting Candida in the bloodstream of high risk children, and was also able to detect the presence of more than one species in the same patient that might impact therapy when the fungi are resistant to azole compounds.
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Affiliation(s)
- G M B Del Negro
- Laboratory of Medical Mycology (LIM-53) - Clinical Dermatologic Division, Hospital das Clínicas da FMUSP e Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, Brazil.
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Okay TS, Yamamoto L, Oliveira LC, Manuli ER, Andrade Junior HFD, Del Negro GMB. Significant performance variation among PCR systems in diagnosing congenital toxoplasmosis in São Paulo, Brazil: analysis of 467 amniotic fluid samples. Clinics (Sao Paulo) 2009; 64:171-6. [PMID: 19330240 PMCID: PMC2666456 DOI: 10.1590/s1807-59322009000300004] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2008] [Accepted: 11/01/2008] [Indexed: 12/02/2022] Open
Abstract
INTRODUCTION Performance variation among PCR systems in detecting Toxoplasma gondii has been extensively reported and associated with target genes, primer composition, amplification parameters, treatment during pregnancy, host genetic susceptibility and genotypes of different parasites according to geographical characteristics. PATIENTS A total of 467 amniotic fluid samples from T. gondii IgM- and IgG-positive Brazilian pregnant women being treated for 1 to 6 weeks at the time of amniocentesis (gestational ages of 14 to 25 weeks). METHODS One nested-B1-PCR and three one-round amplification systems targeted to rDNA, AF146527 and the B1 gene were employed. RESULTS Of the 467 samples, 189 (40.47%) were positive for one-round amplifications: 120 (63.49%) for the B1 gene, 24 (12.69%) for AF146527, 45 (23.80%) for both AF146527 and the B1 gene, and none for rDNA. Fifty previously negative one-round PCR samples were chosen by computer-assisted randomization analysis and re-tested (nested-B1-PCR), during which nine additional cases were detected (9/50 or 18%). DISCUSSION The B1 gene PCR was far more sensitive than the AF146527 PCR, and the rDNA PCR was the least effective even though the rDNA had the most repetitive sequence. Considering that the four amplification systems were equally affected by treatment, that the amplification conditions were optimized for the target genes and that most of the primers have already been reported, it is plausible that the striking differences found among PCR performances could be associated with genetic diversity in patients and/or with different Toxoplasma gondii genotypes occurring in Brazil. CONCLUSION The use of PCR for the diagnosis of fetal Toxoplasma infections in Brazil should be targeted to the B1 gene when only one gene can be amplified, preferably by nested amplification with primers B22/B23.
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Affiliation(s)
- Thelma Suely Okay
- Laboratory of Medical Investigation, Instituto da Criança, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil.
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Vendrame CMV, Carvalho MDT, Rios FJO, Manuli ER, Petitto-Assis F, Goto H. Effect of insulin-like growth factor-I on Leishmania amazonensis promastigote arginase activation and reciprocal inhibition of NOS2 pathway in macrophage in vitro. Scand J Immunol 2007; 66:287-96. [PMID: 17635806 DOI: 10.1111/j.1365-3083.2007.01950.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We showed previously that insulin-like growth factor (IGF)-I induces an exacerbation of the lesion development in experimental cutaneous leishmaniasis favouring parasite growth within host macrophages. Here we studied the effect of IGF-I in vitro in BALB/c mouse peritoneal macrophages infected with stationary phase Leishmania amazonensis promastigotes. IGF-I was used to pre-incubate either macrophage or parasite before infection of the macrophages or adding it at the start of the Leishmania-macrophage culture and maintaining it throughout the experimental period. Independent of stimulation protocol, IGF-I induced significantly increased parasite growth within macrophages. Arginase activation considered as a key factor in Leishmania growth was studied, and its expression and activity were increased in Leishmania-infected macrophages but significantly more in infected cells upon IGF-I stimulus, an effect specifically inhibited by NOHA. Arginase known to be present on Leishmania was also studied, and its expression and activity were seen in the absence of any stimulus but significantly increased after 5 min of incubation with IGF-I. In addition, Leishmania was pre-incubated with NOHA for 5 min, washed, then macrophages infected observing a significantly reduced parasite burden in both IGF-I-stimulated and non-stimulated macrophages. Reciprocal decrease in the nitric oxide (NO) level and inhibition of nitric oxide synthase (NOS2) expression were also observed in IGF-I-stimulated infected macrophages. Our data strongly suggest that IGF-I induces preferential expression and activation of Leishmania promastigote arginase, contributes to the alternative activation of macrophages in the context of innate immunity and interferes with NOS pathway in infected macrophages probably as a reciprocal effect.
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Affiliation(s)
- C M V Vendrame
- Laboratório de Soroepidemiologia e Imunobiologia, Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, São Paulo, Brazil
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