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Chen GH, Dai YC, Hsieh SC, Tsai JJ, Sy AK, Jiz M, Pedroso C, Brites C, Netto EM, Kanki PJ, Saunders DRD, Vanlandingham DL, Higgs S, Huang YJS, Wang WK. Detection of anti-premembrane antibody as a specific marker of four flavivirus serocomplexes and its application to serosurveillance in endemic regions. Emerg Microbes Infect 2024; 13:2301666. [PMID: 38163752 PMCID: PMC10810658 DOI: 10.1080/22221751.2023.2301666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 12/30/2023] [Indexed: 01/03/2024]
Abstract
In the past few decades, several emerging/re-emerging mosquito-borne flaviviruses have resulted in disease outbreaks of public health concern in the tropics and subtropics. Due to cross-reactivities of antibodies recognizing the envelope protein of different flaviviruses, serosurveillance remains a challenge. Previously we reported that anti-premembrane (prM) antibody can discriminate between three flavivirus infections by Western blot analysis. In this study, we aimed to develop a serological assay that can discriminate infection or exposure with flaviviruses from four serocomplexes, including dengue (DENV), Zika (ZIKV), West Nile (WNV) and yellow fever (YFV) viruses, and explore its application for serosurveillance in flavivirus-endemic countries. We employed Western blot analysis including antigens of six flaviviruses (DENV1, 2 and 4, WNV, ZIKV and YFV) from four serocomplexes. We tested serum samples from YF-17D vaccinees, and from DENV, ZIKV and WNV panels that had been confirmed by RT-PCR or by neutralization assays. The overall sensitivity/specificity of anti-prM antibodies for DENV, ZIKV, WNV, and YFV infections/exposure were 91.7%/96.4%, 91.7%/99.2%, 88.9%/98.3%, and 91.3%/92.5%, respectively. When testing 48 samples from Brazil, we identified multiple flavivirus infections/exposure including DENV and ZIKV, DENV and YFV, and DENV, ZIKV and YFV. When testing 50 samples from the Philippines, we detected DENV, ZIKV, and DENV and ZIKV infections with a ZIKV seroprevalence rate of 10%, which was consistent with reports of low-level circulation of ZIKV in Asia. Together, these findings suggest that anti-prM antibody is a flavivirus serocomplex-specific marker and can be employed to delineate four flavivirus infections/exposure in regions where multiple flaviviruses co-circulate.
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Affiliation(s)
- Guan-Hua Chen
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Yu-Ching Dai
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Szu-Chia Hsieh
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Jih-Jin Tsai
- Tropical Medicine Center, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
- School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ava Kristy Sy
- National Reference Laboratory for Dengue and Other Arbovirus, Virology Department, Research Institute for Tropical Medicine, Muntinlupa City, Philippines
| | - Mario Jiz
- Immunology Department, Research Institute for Tropical Medicine, Muntinlupa City, Philippines
| | - Celia Pedroso
- LAPI-Laboratório de Pesquisa em Infectologia-School of Medicine, Federal University of Bahia, Salvador, Brazil
| | - Carlos Brites
- LAPI-Laboratório de Pesquisa em Infectologia-School of Medicine, Federal University of Bahia, Salvador, Brazil
| | - Eduardo Martins Netto
- LAPI-Laboratório de Pesquisa em Infectologia-School of Medicine, Federal University of Bahia, Salvador, Brazil
| | - Phyllis J. Kanki
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | | | - Dana L. Vanlandingham
- Biosecurity Research Institute and Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - Stephen Higgs
- Biosecurity Research Institute and Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - Yan-Jang S. Huang
- Biosecurity Research Institute and Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - Wei-Kung Wang
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, USA
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Saivish MV, Nogueira ML, Rossi SL, Vasilakis N. Exploring Iguape Virus-A Lesser-Known Orthoflavivirus. Viruses 2024; 16:960. [PMID: 38932252 PMCID: PMC11209261 DOI: 10.3390/v16060960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 05/31/2024] [Accepted: 06/12/2024] [Indexed: 06/28/2024] Open
Abstract
Brazil has earned the moniker "arbovirus hotspot", providing an ideal breeding ground for a multitude of arboviruses thriving in various zoonotic and urban cycles. As the planet warms and vectors expand their habitat range, a nuanced understanding of lesser-known arboviruses and the factors that could drive their emergence becomes imperative. Among these viruses is the Iguape virus (IGUV), a member of the Orthoflavivirus aroaense species, which was first isolated in 1979 from a sentinel mouse in the municipality of Iguape, within the Vale do Ribeira region of São Paulo State. While evidence suggests that IGUV circulates among birds, wild rodents, marsupials, bats, and domestic birds, there is no information available on its pathogenesis in both humans and animals. The existing literature on IGUV spans decades, is outdated, and is often challenging to access. In this review, we have curated information from the known literature, clarifying its elusive nature and investigating the factors that may influence its emergence. As an orthoflavivirus, IGUV poses a potential threat, which demands our attention and vigilance, considering the serious outbreaks that the Zika virus, another neglected orthoflavivirus, has unleashed in the recent past.
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Affiliation(s)
- Marielena V. Saivish
- Laboratórios de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto 15090-000, SP, Brazil; (M.V.S.); (M.L.N.)
- Brazilian Biosciences National Laboratory, Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Campinas 13083-100, SP, Brazil
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555-0609, USA;
| | - Maurício L. Nogueira
- Laboratórios de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto 15090-000, SP, Brazil; (M.V.S.); (M.L.N.)
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555-0609, USA;
| | - Shannan L. Rossi
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555-0609, USA;
- Center for Vector-Borne and Zoonotic Diseases, University of Texas Medical Branch, Galveston, TX 77555-0609, USA
- Institute for Human Infection and Immunity, University of Texas Medical Branch, Galveston, TX 77555-0610, USA
| | - Nikos Vasilakis
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555-0609, USA;
- Center for Vector-Borne and Zoonotic Diseases, University of Texas Medical Branch, Galveston, TX 77555-0609, USA
- Institute for Human Infection and Immunity, University of Texas Medical Branch, Galveston, TX 77555-0610, USA
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3
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Prado AF, Prist PR, Mucci LF, de Freitas PD. Ecological Requirements for Abundance and Dispersion of Brazilian Yellow Fever Vectors in Tropical Areas. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2024; 21:609. [PMID: 38791823 PMCID: PMC11120827 DOI: 10.3390/ijerph21050609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/01/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024]
Abstract
In the Americas, wild yellow fever (WYF) is an infectious disease that is highly lethal for some non-human primate species and non-vaccinated people. Specifically, in the Brazilian Atlantic Forest, Haemagogus leucocelaenus and Haemagogus janthinomys mosquitoes act as the major vectors. Despite transmission risk being related to vector densities, little is known about how landscape structure affects vector abundance and movement. To fill these gaps, we used vector abundance data and a model-selection approach to assess how landscape structure affects vector abundance, aiming to identify connecting elements for virus dispersion in the state of São Paulo, Brazil. Our findings show that Hg. leucocelaenus and Hg. janthinomys abundances, in highly degraded and fragmented landscapes, are mainly affected by increases in forest cover at scales of 2.0 and 2.5 km, respectively. Fragmented landscapes provide ecological corridors for vector dispersion, which, along with high vector abundance, promotes the creation of risk areas for WYF virus spread, especially along the border with Minas Gerais state, the upper edges of the Serra do Mar, in the Serra da Cantareira, and in areas of the metropolitan regions of São Paulo and Campinas.
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Affiliation(s)
- Amanda Francisco Prado
- Department of Genetics and Evolution, Center for Biological and Health Sciences, Federal University of São Carlos, Rodovia Washington Luis km 235, São Carlos 13565-905, SP, Brazil;
| | | | - Luis Filipe Mucci
- Taubaté Regional Lab., State Department of Health of São Paulo, Instituto Pasteur, Pça. Coronel Vitoriano, 23, Taubate 12020-020, SP, Brazil;
| | - Patrícia Domingues de Freitas
- Department of Genetics and Evolution, Center for Biological and Health Sciences, Federal University of São Carlos, Rodovia Washington Luis km 235, São Carlos 13565-905, SP, Brazil;
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Gonçalves AP, Almeida LT, de Rezende IM, Fradico JRB, Pereira LS, Ramalho DB, Pascoal Xavier MA, Calzavara Silva CE, Monath TP, LaBeaud AD, Drumond BP, Campi-Azevedo AC, Martins-Filho OA, Teixeira-Carvalho A, Alves PA. Evaluation of humoral immune response after yellow fever infection: an observational study on patients from the 2017-2018 sylvatic outbreak in Brazil. Microbiol Spectr 2024; 12:e0370323. [PMID: 38511952 PMCID: PMC11064539 DOI: 10.1128/spectrum.03703-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 03/08/2024] [Indexed: 03/22/2024] Open
Abstract
Between 2016 and 2018, Brazil experienced major sylvatic yellow fever (YF) outbreaks that caused hundreds of casualties, with Minas Gerais (MG) being the most affected state. These outbreaks provided a unique opportunity to assess the immune response triggered by the wild-type (WT) yellow fever virus (YFV) in humans. The plaque reduction neutralization test (PRNT) is currently the standard method to assess the humoral immune response to YFV by measuring neutralizing antibodies (nAbs). The present study aimed to evaluate the humoral immune response of patients from the 2017-2018 sylvatic YF outbreak in MG with different disease outcomes by using PRNTs with a WT YFV strain, isolated from the 2017-2018 outbreak, and a vaccine YFV strain. Samples from naturally infected YF patients were tested, in comparison with healthy vaccinees. Results showed that both groups presented different levels of nAb against the WT and vaccine strains, and the levels of neutralization against the strains varied homotypically and heterotypically. Results based on the geometric mean titers (GMTs) suggest that the humoral immune response after a natural infection of YFV can reach higher levels than that induced by vaccination (GMT of patients against WT YFV compared to GMT of vaccinees, P < 0.0001). These findings suggest that the humoral immune responses triggered by the vaccine and WT strains of YFV are different, possibly due to genetic and antigenic differences between these viruses. Therefore, current means of assessing the immune response in naturally infected YF individuals and immunological surveillance methods in areas with intense viral circulation may need to be updated.IMPORTANCEYellow fever is a deadly febrile disease caused by the YFV. Despite the existence of effective vaccines, this disease still represents a public health concern worldwide. Much is known about the immune response against the vaccine strains of the YFV, but recent studies have shown that it differs from that induced by WT strains. The extent of this difference and the mechanisms behind it are still unclear. Thus, studies aimed to better understand the immune response against this virus are relevant and necessary. The present study evaluated levels of neutralizing antibodies of yellow fever patients from recent outbreaks in Brazil, in comparison with healthy vaccinees, using plaque reduction neutralization tests with WT and vaccine YFV strains. Results showed that the humoral immune response in naturally infected patients was higher than that induced by vaccination, thus providing new insights into the immune response triggered against these viruses.
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Affiliation(s)
| | - Letícia Trindade Almeida
- Instituto René Rachou, Fundação Oswaldo Cruz (FIOCRUZ-Minas), Belo Horizonte, Minas Gerais, Brazil
| | - Izabela Maurício de Rezende
- Department of Pediatrics, Infectious Disease Division, Stanford University School of Medicine, Stanford, California, USA
| | | | - Leonardo Soares Pereira
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Hospital Eduardo de Menezes (HEM), Fundação Hospitalar do Estado de Minas Gerais (FHEMIG), Belo Horizonte, Minas Gerais, Brazil
| | - Dario Brock Ramalho
- Hospital Eduardo de Menezes (HEM), Fundação Hospitalar do Estado de Minas Gerais (FHEMIG), Belo Horizonte, Minas Gerais, Brazil
| | - Marcelo Antônio Pascoal Xavier
- Instituto René Rachou, Fundação Oswaldo Cruz (FIOCRUZ-Minas), Belo Horizonte, Minas Gerais, Brazil
- Departamento de Anatomia Patológica e Medicina Legal, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | | | - Angelle Desiree LaBeaud
- Department of Pediatrics, Infectious Disease Division, Stanford University School of Medicine, Stanford, California, USA
| | - Betania Paiva Drumond
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | | | - Andréa Teixeira-Carvalho
- Instituto René Rachou, Fundação Oswaldo Cruz (FIOCRUZ-Minas), Belo Horizonte, Minas Gerais, Brazil
| | - Pedro Augusto Alves
- Instituto René Rachou, Fundação Oswaldo Cruz (FIOCRUZ-Minas), Belo Horizonte, Minas Gerais, Brazil
| | - Grupo de Estudos de Pesquisa e Resposta em Febre Amarela do Estado de Minas Gerais
- Instituto René Rachou, Fundação Oswaldo Cruz (FIOCRUZ-Minas), Belo Horizonte, Minas Gerais, Brazil
- Department of Pediatrics, Infectious Disease Division, Stanford University School of Medicine, Stanford, California, USA
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Hospital Eduardo de Menezes (HEM), Fundação Hospitalar do Estado de Minas Gerais (FHEMIG), Belo Horizonte, Minas Gerais, Brazil
- Departamento de Anatomia Patológica e Medicina Legal, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Crozet BioPharma LLC, Lexington, Massachusetts, USA
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5
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Zini N, Ávila MHT, Cezarotti NM, Parra MCP, Banho CA, Sacchetto L, Negri AF, Araújo E, Bittar C, Milhin BHGDA, Miranda Hernandes V, Dutra KR, Trigo LA, Cecílio da Rocha L, Alves da Silva R, Celestino Dutra da Silva G, Fernanda Pereira Dos Santos T, de Carvalho Marques B, Lopes Dos Santos A, Augusto MT, Mistrão NFB, Ribeiro MR, Pinheiro TM, Maria Izabel Lopes Dos Santos T, Avilla CMS, Bernardi V, Freitas C, Gandolfi FDA, Ferraz Júnior HC, Perim GC, Gomes MC, Garcia PHC, Rocha RS, Galvão TM, Fávaro EA, Scamardi SN, Rogovski KS, Peixoto RL, Benfatti L, Cruz LT, Chama PPDF, Oliveira MT, Watanabe ASA, Terzian ACB, de Freitas Versiani A, Dibo MR, Chiaravalotti-Neto F, Weaver SC, Estofolete CF, Vasilakis N, Nogueira ML. Cryptic circulation of chikungunya virus in São Jose do Rio Preto, Brazil, 2015-2019. PLoS Negl Trop Dis 2024; 18:e0012013. [PMID: 38484018 DOI: 10.1371/journal.pntd.0012013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 03/26/2024] [Accepted: 02/19/2024] [Indexed: 03/27/2024] Open
Abstract
BACKGROUND Chikungunya virus (CHIKV) has spread across Brazil with varying incidence rates depending on the affected areas. Due to cocirculation of arboviruses and overlapping disease symptoms, CHIKV infection may be underdiagnosed. To understand the lack of CHIKV epidemics in São José do Rio Preto (SJdRP), São Paulo (SP), Brazil, we evaluated viral circulation by investigating anti-CHIKV IgG seroconversion in a prospective study of asymptomatic individuals and detecting anti-CHIKV IgM in individuals suspected of dengue infection, as well as CHIKV presence in Aedes mosquitoes. The opportunity to assess two different groups (symptomatic and asymptomatic) exposed at the same geographic region aimed to broaden the possibility of identifying the viral circulation, which had been previously considered absent. METHODOLOGY/PRINCIPAL FINDINGS Based on a prospective population study model and demographic characteristics (sex and age), we analyzed the anti-CHIKV IgG seroconversion rate in 341 subjects by ELISA over four years. The seroprevalence increased from 0.35% in the first year to 2.3% after 3 years of follow-up. Additionally, we investigated 497 samples from a blood panel collected from dengue-suspected individuals during the 2019 dengue outbreak in SJdRP. In total, 4.4% were positive for anti-CHIKV IgM, and 8.6% were positive for IgG. To exclude alphavirus cross-reactivity, we evaluated the presence of anti-Mayaro virus (MAYV) IgG by ELISA, and the positivity rate was 0.3% in the population study and 0.8% in the blood panel samples. In CHIKV and MAYV plaque reduction neutralization tests (PRNTs), the positivity rate for CHIKV-neutralizing antibodies in these ELISA-positive samples was 46.7%, while no MAYV-neutralizing antibodies were detected. Genomic sequencing and phylogenetic analysis revealed CHIKV genotype ECSA in São José do Rio Preto, SP. Finally, mosquitoes collected to complement human surveillance revealed CHIKV positivity of 2.76% of A. aegypti and 9.09% of A. albopictus (although it was far less abundant than A. aegypti) by RT-qPCR. CONCLUSIONS/SIGNIFICANCE Our data suggest cryptic CHIKV circulation in SJdRP detected by continual active surveillance. These low levels, but increasing, of viral circulation highlight the possibility of CHIKV outbreaks, as there is a large naïve population. Improved knowledge of the epidemiological situation might aid in outbreaks prevention.
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Affiliation(s)
- Nathalia Zini
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Matheus Henrique Tavares Ávila
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Natalia Morbi Cezarotti
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Maisa Carla Pereira Parra
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Cecília Artico Banho
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Livia Sacchetto
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Andreia Francesli Negri
- Vigilância Epidemiológica, Secretaria de Saúde de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Emerson Araújo
- Department of Strategic Coordination of Health Surveillance, Secretary of Health Surveillance, Brazilian Ministry of Health, Rio de Janeiro, Brazil
| | - Cintia Bittar
- Laboratório de Estudos Genômicos, Instituto de Biociências, Letras & Ciências Exatas, Universidade Estadual Paulista, São José do Rio Preto, São Paulo, Brazil
| | - Bruno Henrique Gonçalves de Aguiar Milhin
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Victor Miranda Hernandes
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Karina Rocha Dutra
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Leonardo Agopian Trigo
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Leonardo Cecílio da Rocha
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Rafael Alves da Silva
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Gislaine Celestino Dutra da Silva
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Tamires Fernanda Pereira Dos Santos
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Beatriz de Carvalho Marques
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Andresa Lopes Dos Santos
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Marcos Tayar Augusto
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Natalia Franco Bueno Mistrão
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Milene Rocha Ribeiro
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Tauyne Menegaldo Pinheiro
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Thayza Maria Izabel Lopes Dos Santos
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Clarita Maria Secco Avilla
- Laboratório de Estudos Genômicos, Instituto de Biociências, Letras & Ciências Exatas, Universidade Estadual Paulista, São José do Rio Preto, São Paulo, Brazil
| | - Victoria Bernardi
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Caroline Freitas
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Flora de Andrade Gandolfi
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Hélio Correa Ferraz Júnior
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Gabriela Camilotti Perim
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Mirella Cezare Gomes
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Pedro Henrique Carrilho Garcia
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Rodrigo Sborghi Rocha
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Tayna Manfrin Galvão
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Eliane Aparecida Fávaro
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Samuel Noah Scamardi
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Karen Sanmartin Rogovski
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Renan Luiz Peixoto
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | - Luiza Benfatti
- Laboratório de Investigação de Microrganismos, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
| | | | | | - Mânlio Tasso Oliveira
- Laboratório de Retrovirologia, Departamento de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Aripuanã Sakurada Aranha Watanabe
- Instituto de Ciências Biológicas, Departamento de Parasitologia e Microbiologia, Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil
| | - Ana Carolina Bernardes Terzian
- Laboratório de Imunologia Celular e Molecular, Instituto René Rachou, Fundação Osvaldo Cruz, Belo Horizonte, Minas Gerais, Brazil
| | - Alice de Freitas Versiani
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Margareth Regina Dibo
- Laboratório de Entomologia, Superintendência de Controle de Endemias, São Paulo, Brazil
| | | | - Scott Cameron Weaver
- Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, Texas, United States of America
- Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas, United States of America
- Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas, United States of America
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Cassia Fernanda Estofolete
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
- Hospital de Base, FUNFARME, São José Do Rio Preto, São Paulo, Brazil
| | - Nikos Vasilakis
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America
- Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas, United States of America
- Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas, United States of America
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, Texas, United States of America
- Center for Vector-Borne and Zoonotic Diseases, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Mauricio Lacerda Nogueira
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America
- Hospital de Base, FUNFARME, São José Do Rio Preto, São Paulo, Brazil
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6
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Coelho Ferraz A, Bueno da Silva Menegatto M, Lameira Souza Lima R, Samuel Ola-Olub O, Caldeira Costa D, Carlos de Magalhães J, Maurício Rezende I, Desiree LaBeaud A, P Monath T, Augusto Alves P, Teixeira de Carvalho A, Assis Martins-Filho O, P Drumond B, Magalhães CLDB. Yellow fever virus infection in human hepatocyte cells triggers an imbalance in redox homeostasis with increased reactive oxygen species production, oxidative stress, and decreased antioxidant enzymes. Free Radic Biol Med 2024; 213:266-273. [PMID: 38278309 PMCID: PMC10911966 DOI: 10.1016/j.freeradbiomed.2024.01.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 01/28/2024]
Abstract
Yellow fever (YF) presents a wide spectrum of severity, with clinical manifestations in humans ranging from febrile and self-limited to fatal cases. Although YF is an old disease for which an effective and safe vaccine exists, little is known about the viral- and host-specific mechanisms that contribute to liver pathology. Several studies have demonstrated that oxidative stress triggered by viral infections contributes to pathogenesis. We evaluated whether yellow fever virus (YFV), when infecting human hepatocytes cells, could trigger an imbalance in redox homeostasis, culminating in oxidative stress. YFV infection resulted in a significant increase in reactive oxygen species (ROS) levels from 2 to 4 days post infection (dpi). When measuring oxidative parameters at 4 dpi, YFV infection caused oxidative damage to lipids, proteins, and DNA, evidenced by an increase in lipid peroxidation/8-isoprostane, carbonyl protein, and 8-hydroxy-2'-deoxyguanosine, respectively. Furthermore, there was a significant reduction in the activity of the antioxidant enzymes superoxide dismutase (SOD) and glutathione peroxidase (GPx), in addition to a reduction in the ratio of reduced to oxidized glutathione (GSH/GSSG), indicating a pro-oxidant environment. However, no changes were observed in the enzymatic activity of the enzyme catalase (CAT) or in the gene expression of SOD isoforms (1/2/3), CAT, or GPx. Therefore, our results show that YFV infection generates an imbalance in redox homeostasis, with the overproduction of ROS and depletion of antioxidant enzymes, which induces oxidative damage to cellular constituents. Moreover, as it has been demonstrated that oxidative stress is a conspicuous event in YFV infection, therapeutic strategies based on antioxidant biopharmaceuticals may be new targets for the treatment of YF.
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Affiliation(s)
- Ariane Coelho Ferraz
- Programa de Pós-Graduação em Ciências Biológicas, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Marília Bueno da Silva Menegatto
- Programa de Pós-Graduação em Ciências Biológicas, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Rafaela Lameira Souza Lima
- Programa de Pós-Graduação em Ciências Biológicas, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Oluwashola Samuel Ola-Olub
- Programa de Pós-Graduação em Biotecnologia, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Daniela Caldeira Costa
- Programa de Pós-Graduação em Ciências Biológicas, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - José Carlos de Magalhães
- Programa de Pós-Graduação em Biotecnologia, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil; Departamento de Química, Biotecnologia e Engenharia de Bioprocessos, Universidade Federal de São João del-Rei, Ouro Branco, Minas Gerais, Brazil
| | - Izabela Maurício Rezende
- Pandemic Preparedenss Hub, Divison of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, CA, United States
| | - Angelle Desiree LaBeaud
- Division of Infectious Diseases, Department of Pediatrics, Stanford University School of Medicine, California, United States
| | | | - Pedro Augusto Alves
- Imunologia de Doenças Virais, Instituto René Rachou, Fundação Oswaldo Cruz - FIOCRUZ-Minas, Belo Horizonte, Minas Gerais, Brazil
| | - Andréa Teixeira de Carvalho
- Grupo Integrado de Pesquisa em Biomarcadores, Instituto René Rachou, Fundação Oswaldo Cruz - FIOCRUZ-Minas, Belo Horizonte, Minas Gerais, Brazil
| | - Olindo Assis Martins-Filho
- Grupo Integrado de Pesquisa em Biomarcadores, Instituto René Rachou, Fundação Oswaldo Cruz - FIOCRUZ-Minas, Belo Horizonte, Minas Gerais, Brazil
| | - Betânia P Drumond
- Laboratório de Vírus, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Cintia Lopes de Brito Magalhães
- Programa de Pós-Graduação em Ciências Biológicas, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil; Programa de Pós-Graduação em Biotecnologia, Núcleo de Pesquisas em Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil.
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7
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Garcia-Oliveira GF, Guimarães ACDS, Moreira GD, Costa TA, Arruda MS, de Mello ÉM, Silva MC, de Almeida MG, Hanley KA, Vasilakis N, Drumond BP. YELLOW ALERT: Persistent Yellow Fever Virus Circulation among Non-Human Primates in Urban Areas of Minas Gerais State, Brazil (2021-2023). Viruses 2023; 16:31. [PMID: 38257732 PMCID: PMC10818614 DOI: 10.3390/v16010031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/15/2023] [Accepted: 12/19/2023] [Indexed: 01/24/2024] Open
Abstract
Yellow fever virus (YFV) is the agent of yellow fever (YF), which affects both humans and non-human primates (NHP). Neotropical NHP are highly susceptible to YFV and considered sentinels for YFV circulation. Brazil faced a significant YF outbreak in 2017-2018, with over 2000 human cases and 2000 epizootics cases, mainly in the State of Minas Gerais, Brazil. This study aimed to investigate whether YFV circulation persisted in NHP after the human outbreak had subsided. To this end, NHP carcass samples collected in Minas Gerais from 2021 to 2023 were screened for YFV. RNA was extracted from tissue fragments and used in RT-qPCR targeting the YFV 5'UTR. Liver and lung samples from 166 animals were tested, and the detection of the β-actin mRNA was used to ensure adequacy of RNA isolation. YFV RNA was detected in the liver of 18 NHP carcasses collected mainly from urban areas in 2021 and 2022. YFV positive NHP were mostly represented by Callithrix, from 5 out of the 12 grouped municipalities (mesoregions) in Minas Gerais state. These findings reveal the continued YFV circulation in NHP in urban areas of Minas Gerais during 2021 and 2022, with the attendant risk of re-establishing the urban YFV cycle.
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Affiliation(s)
- Gabriela F. Garcia-Oliveira
- Laboratório de Vírus, Departament of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte CEP 31270-901, Brazil; (G.F.G.-O.); (A.C.D.S.G.); (G.D.M.); (T.A.C.); (M.S.A.)
| | - Anna Catarina Dias Soares Guimarães
- Laboratório de Vírus, Departament of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte CEP 31270-901, Brazil; (G.F.G.-O.); (A.C.D.S.G.); (G.D.M.); (T.A.C.); (M.S.A.)
| | - Gabriel Dias Moreira
- Laboratório de Vírus, Departament of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte CEP 31270-901, Brazil; (G.F.G.-O.); (A.C.D.S.G.); (G.D.M.); (T.A.C.); (M.S.A.)
| | - Thais Alkifeles Costa
- Laboratório de Vírus, Departament of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte CEP 31270-901, Brazil; (G.F.G.-O.); (A.C.D.S.G.); (G.D.M.); (T.A.C.); (M.S.A.)
| | - Matheus Soares Arruda
- Laboratório de Vírus, Departament of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte CEP 31270-901, Brazil; (G.F.G.-O.); (A.C.D.S.G.); (G.D.M.); (T.A.C.); (M.S.A.)
| | - Érica Munhoz de Mello
- Centro de Controle de Zoonoses, Prefeitura de Belo Horizonte, Belo Horizonte CEP 31270-705, Minas Gerais, Brazil
| | - Marlise Costa Silva
- Laboratório de Zoonoses, Prefeitura de Belo Horizonte, Belo Horizonte CEP 31270-705, Minas Gerais, Brazil
| | | | - Kathryn A. Hanley
- Department of Biology, New Mexico State University, Las Cruces, NM 88003-8801, USA;
| | - Nikos Vasilakis
- Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555-0609, USA;
- Center for Vector-Borne and Zoonotic Diseases, The University of Texas Medical Branch, Galveston, TX 77555-0609, USA
- Institute for Human Infection and Immunity, University of Texas Medical Branch, Galveston, TX 77555-0610, USA
| | - Betânia Paiva Drumond
- Laboratório de Vírus, Departament of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte CEP 31270-901, Brazil; (G.F.G.-O.); (A.C.D.S.G.); (G.D.M.); (T.A.C.); (M.S.A.)
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8
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Chen GH, Dai YC, Hsieh SC, Tsai JJ, Sy AK, Jiz M, Pedroso C, Brites C, Netto EM, Kanki PJ, Saunders DRD, Vanlandingham DL, Higgs S, Huang YJS, Wang WK. Detection of anti-premembrane antibody as a specific marker of four flavivirus serocomplexes and its application to serosurveillance in endemic regions. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.09.21.23295701. [PMID: 37808865 PMCID: PMC10557774 DOI: 10.1101/2023.09.21.23295701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
In the past few decades, several emerging/re-emerging mosquito-borne flaviviruses have resulted in disease outbreaks of public health concern in the tropics and subtropics. Due to cross-reactivities of antibodies recognizing the envelope protein of different flaviviruses, serosurveillance remains a challenge. Previously we reported that anti-premembrane (prM) antibody can discriminate between three flavivirus infections by Western blot analysis. In this study, we aimed to develop a serological assay that can discriminate infection or exposure with flaviviruses from four serocomplexes, including dengue (DENV), Zika (ZIKV), West Nile (WNV) and yellow fever (YFV) viruses, and explore its application for serosurveillance in flavivirus-endemic countries. We employed Western blot analysis including antigens of six flaviviruses (DENV1, 2 and 4, WNV, ZIKV and YFV) from four serocomplexes. We tested serum samples from YF-17D vaccinees, and from DENV, ZIKV and WNV panels that had been confirmed by RT-PCR or by neutralization assays. The overall sensitivity/specificity of anti-prM antibodies for DENV, ZIKV, WNV, and YFV infections/exposure were 91.7%/96.4%, 91.7%/99.2%, 88.9%/98.3%, and 91.3%/92.5%, respectively. When testing 48 samples from Brazil, we identified multiple flavivirus infections/exposure including DENV and ZIKV, DENV and YFV, and DENV, ZIKV and YFV. When testing 50 samples from the Philippines, we detected DENV, ZIKV, and DENV and ZIKV infections with a ZIKV seroprevalence rate of 10%, which was consistent with reports of low-level circulation of ZIKV in Asia. Together, these findings suggest that anti-prM antibody is a flavivirus serocomplex-specific marker and can be employed to delineate four flavivirus infections/exposure in regions where multiple flaviviruses co-circulate.
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9
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Silva NIO, Albery GF, Arruda MS, Oliveira GFG, Costa TA, de Mello ÉM, Moreira GD, Reis EV, da Silva SA, Silva MC, de Almeida MG, Becker DJ, Carlson CJ, Vasilakis N, Hanley KA, Drumond BP. Ecological drivers of sustained enzootic yellow fever virus transmission in Brazil, 2017-2021. PLoS Negl Trop Dis 2023; 17:e0011407. [PMID: 37276217 PMCID: PMC10270639 DOI: 10.1371/journal.pntd.0011407] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 06/15/2023] [Accepted: 05/22/2023] [Indexed: 06/07/2023] Open
Abstract
Beginning December 2016, sylvatic yellow fever (YF) outbreaks spread into southeastern Brazil, and Minas Gerais state experienced two sylvatic YF waves (2017 and 2018). Following these massive YF waves, we screened 187 free-living non-human primate (NHPs) carcasses collected throughout the state between January 2019 and June 2021 for YF virus (YFV) using RTqPCR. One sample belonging to a Callithrix, collected in June 2020, was positive for YFV. The viral strain belonged to the same lineage associated with 2017-2018 outbreaks, showing the continued enzootic circulation of YFV in the state. Next, using data from 781 NHPs carcasses collected in 2017-18, we used generalized additive mixed models (GAMMs) to identify the spatiotemporal and host-level drivers of YFV infection and intensity (an estimation of genomic viral load in the liver of infected NHP). Our GAMMs explained 65% and 68% of variation in virus infection and intensity, respectively, and uncovered strong temporal and spatial patterns for YFV infection and intensity. NHP infection was higher in the eastern part of Minas Gerais state, where 2017-2018 outbreaks affecting humans and NHPs were concentrated. The odds of YFV infection were significantly lower in NHPs from urban areas than from urban-rural or rural areas, while infection intensity was significantly lower in NHPs from urban areas or the urban-rural interface relative to rural areas. Both YFV infection and intensity were higher during the warm/rainy season compared to the cold/dry season. The higher YFV intensity in NHPs in warm/rainy periods could be a result of higher exposure to vectors and/or higher virus titers in vectors during this time resulting in the delivery of a higher virus dose and higher viral replication levels within NHPs. Further studies are needed to better test this hypothesis and further compare the dynamics of YFV enzootic cycles between different seasons.
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Affiliation(s)
| | - Gregory F. Albery
- Department of Biology, Georgetown University, Washington, DC, United States of America
| | - Matheus Soares Arruda
- Department of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Thaís Alkifeles Costa
- Department of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Érica Munhoz de Mello
- Department of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Laboratório de Zoonoses—Centro de Controle de Zoonoses, Prefeitura de Belo Horizonte, Belo Horizonte, Minas Gerais, Brazil
| | - Gabriel Dias Moreira
- Department of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Erik Vinícius Reis
- Department of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Simone Agostinho da Silva
- Laboratório de Zoonoses—Centro de Controle de Zoonoses, Prefeitura de Belo Horizonte, Belo Horizonte, Minas Gerais, Brazil
| | - Marlise Costa Silva
- Laboratório de Zoonoses—Centro de Controle de Zoonoses, Prefeitura de Belo Horizonte, Belo Horizonte, Minas Gerais, Brazil
| | - Munique Guimarães de Almeida
- Laboratório de Zoonoses—Centro de Controle de Zoonoses, Prefeitura de Belo Horizonte, Belo Horizonte, Minas Gerais, Brazil
| | - Daniel J. Becker
- Department of Biology, University of Oklahoma, Norman, Oklahoma, United States of America
| | - Colin J. Carlson
- Department of Biology, Georgetown University, Washington, DC, United States of America
- Center for Global Health Science and Security, Georgetown University, Washington, D.C., United States of America
| | - Nikos Vasilakis
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America
- Center for Vector-Borne and Zoonotic Diseases, The University of Texas Medical Branch, Galveston, Texas, United States of America
- Institute for Human Infection and Immunity, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Kathryn A. Hanley
- Department of Biology, New Mexico State University, Las Cruces, New Mexico, United States of America
| | - Betânia Paiva Drumond
- Department of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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10
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Faggioni G, De Santis R, Moramarco F, Di Donato M, De Domenico A, Molinari F, Petralito G, Fortuna C, Venturi G, Rezza G, Lista F. Pan-Yellow Fever Virus Detection and Lineage Assignment by Real-Time RT-PCR and Amplicon Sequencing. J Virol Methods 2023; 316:114717. [PMID: 36972832 DOI: 10.1016/j.jviromet.2023.114717] [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: 09/20/2022] [Revised: 03/03/2023] [Accepted: 03/21/2023] [Indexed: 03/29/2023]
Abstract
Yellow fever disease is a viral zoonosis that may result in a severe hemorrhagic disease. A safe and effective vaccine used in mass immunization campaigns has allowed control and mitigation against explosive outbreaks in endemic areas. Since the 1960's, re-emergent of the yellow fever virus has been observed. The timely implementation of control measures, to avoid or contain an ongoing outbreak requires rapid specific viral detection methods. Here a novel molecular assay, expected to detect all known yellow fever virus strains, is described. The method has demonstrated high sensitivity and specificity in real-time RT-PCR as well as in an endpoint RT-PCR set-up. Sequence alignment and phylogenetic analysis reveal that the amplicon resulting from the novel method covers a genomic region whose mutational profile is completely associated to the yellow fever viral lineages. Therefore, sequencing analysis of this amplicon allows for assignment of the viral lineage.
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Affiliation(s)
| | | | | | | | | | | | | | - Claudia Fortuna
- Department of Infectious, Parasitic and Immunomediated Diseases, Istituto Superiore di Sanità, Rome, Italy.
| | - Giulietta Venturi
- Department of Infectious, Parasitic and Immunomediated Diseases, Istituto Superiore di Sanità, Rome, Italy.
| | - Giovanni Rezza
- Health Prevention Directorate, Ministry of Health, Rome, Italy.
| | - Florigio Lista
- Army Medical Center, Scientific Department, Rome, Italy.
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11
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Kling K, Domingo C, Bogdan C, Duffy S, Harder T, Howick J, Kleijnen J, McDermott K, Wichmann O, Wilder-Smith A, Wolff R. Duration of Protection After Vaccination Against Yellow Fever: A Systematic Review and Meta-Analysis. Clin Infect Dis 2022; 75:2266-2274. [PMID: 35856638 PMCID: PMC9761887 DOI: 10.1093/cid/ciac580] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 06/30/2022] [Accepted: 07/13/2022] [Indexed: 01/19/2023] Open
Abstract
The duration of protection after a single dose of yellow fever vaccine is a matter of debate. To summarize the current knowledge, we performed a systematic literature review and meta-analysis. Studies on the duration of protection after 1 and ≥2 vaccine doses were reviewed. Data were stratified by time since vaccination. In our meta-analysis, we used random-effects models. We identified 36 studies from 20 countries, comprising more than 17 000 participants aged 6 months to 85 years. Among healthy adults and children, pooled seroprotection rates after single vaccination dose were close to 100% by 3 months and remained high in adults for 5 to 10 years. In children vaccinated before age 2 years, the seroprotection rate was 52% within 5 years after primary vaccination. For immunodeficient persons, data indicate relevant waning. The extent of waning of seroprotection after yellow fever vaccination depends on age and immune status at primary vaccination.
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Affiliation(s)
- Kerstin Kling
- Immunization Unit, Department of Infectious Disease Epidemiology, Robert Koch Institute, Berlin, Germany
| | - Cristina Domingo
- Center for International Health Protection, Robert Koch Institute, Berlin, Germany
| | - Christian Bogdan
- Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Friedrich Alexander Universität (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Steven Duffy
- Kleijnen Systematic Reviews Ltd, York, United Kingdom
| | - Thomas Harder
- Immunization Unit, Department of Infectious Disease Epidemiology, Robert Koch Institute, Berlin, Germany
| | - Jeremy Howick
- Kleijnen Systematic Reviews Ltd, York, United Kingdom
| | - Jos Kleijnen
- Kleijnen Systematic Reviews Ltd, York, United Kingdom
| | | | - Ole Wichmann
- Immunization Unit, Department of Infectious Disease Epidemiology, Robert Koch Institute, Berlin, Germany
| | - Annelies Wilder-Smith
- Heidelberg Institute of Global Health, University of Heidelberg, Heidelberg, Germany.,Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Robert Wolff
- Kleijnen Systematic Reviews Ltd, York, United Kingdom
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12
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Back to Where It Was First Described: Vectors of Sylvatic Yellow Fever Transmission in the 2017 Outbreak in Espírito Santo, Brazil. Viruses 2022; 14:v14122805. [PMID: 36560809 PMCID: PMC9785321 DOI: 10.3390/v14122805] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Evidence of sylvatic yellow fever was first reported in Atlantic Forest areas in Espírito Santo, Brazil, during a yellow fever virus (YFV) outbreak in 1931. An entomological survey was conducted in six forest sites during and after an outbreak reported ~80 years after the last case in the area. Among 10,658 mosquitoes of 78 species, Haemagogus leucocelaenus, and Hg. janthinomys/capricornii were considered the main vectors as they had a relatively high abundance, co-occurred in essentially all areas, and showed high YFV infection rates. Sabethes chloropterus, Sa. soperi, Sa. identicus, Aedes aureolineatus, and Shannoniana fluviatilis may have a secondary role in transmission. This is the first report of Sa. identicus, Ae. aureolineatus, and Sh. fluviatilis infected with YFV. Our study emphasizes the importance of entomological monitoring and maintenance of high vaccination coverage in receptive areas to YFV transmission.
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13
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Occurrence of yellow fever outbreaks in a partially vaccinated population: An analysis of the effective reproduction number. PLoS Negl Trop Dis 2022; 16:e0010741. [PMID: 36108073 PMCID: PMC9514630 DOI: 10.1371/journal.pntd.0010741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 09/27/2022] [Accepted: 08/13/2022] [Indexed: 11/19/2022] Open
Abstract
Background Yellow fever is endemic in Africa and the Americas, occurring in urban or sylvatic environments. The infection presents varying symptoms, with high case-fatality among severe cases. In 2016, Brazil had sylvatic yellow fever outbreaks with more than 11 thousand cases, predominantly affecting the country’s Southeast region. The state of Minas Gerais accounted for 30% of cases, even after the vaccine had been included in the immunization calendar for at least 30 years. Methodology and principal findings We applied parameters described in the literature from yellow fever disease into a compartmental model of vector-borne diseases, using namely generation time intervals, vital host and vector parameters, and force of infection, using macroregions as the spatial unit and epidemiological weeks as the time interval. The model permits obtaining the reproduction number, which we analyzed from reported cases of yellow fever from 2016 to 2018 in residents of the state of Minas Gerais, Brazil. Minas Gerais recorded two outbreak periods, starting in EW 51/2016 and EW 51/2017. Of all the reported cases (3,304), 57% were men 30 to 59 years of age. Approximately 27% of cases (905) were confirmed, and 22% (202) of these individuals died. The estimated effective reproduction number varied from 2.7 (95% CI: 2.0–3.6) to 7.2 (95% CI: 4.4–10.9], found in the Oeste and Nordeste regions, respectively. Vaccination coverage in children under one year of age showed heterogeneity among the municipalities comprising the macroregions. Conclusion The outbreaks in multiple parts of the state and the estimated Re values raise concern since the state population was partially vaccinated. Heterogeneity in vaccination coverage may have been associated with the occurrence of outbreaks in the first period, while the subsequent intense vaccination campaign may have determined lower Re values in the second period. Yellow fever attracts important research interest since it is an avoidable disease and is still recurrent in Brazil. Although the country has an important public policy that integrates production, distribution, and routine application of the yellow fever vaccine, the disease is still included on the list of endemic infectious diseases in some regions. Surprisingly, regions that were not previously part of risk areas for yellow fever were heavily affected by the outbreak from 2016 to 2018 in the country. Understanding the outbreak’s occurrence and intensity in the state of Minas Gerais based on the effective reproduction number, the focus of this article, is just part of the larger goal of defining with greater certainty the risk areas for yellow fever and proposing measures to control the spread of the disease.
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Possamai CB, Rodrigues de Melo F, Mendes SL, Strier KB. Demographic changes in an Atlantic Forest primate community following a yellow fever outbreak. Am J Primatol 2022; 84:e23425. [PMID: 35899394 DOI: 10.1002/ajp.23425] [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: 12/11/2021] [Revised: 05/25/2022] [Accepted: 07/11/2022] [Indexed: 11/07/2022]
Abstract
We investigated demographic changes in three primate species (Alouatta guariba, Sapajus nigritus, and Callithrix flaviceps) at the Reserva Particular do Patrimônio Natural-Feliciano Miguel Abdala, Caratinga, Minas Gerais, Brazil, following a yellow fever outbreak (YFO) by comparing their population sizes before (2015) and after the outbreak (2017-2018), and by monitoring the size, composition, and reproductive status of groups from 2017 to 2021. Comparisons of pre- and post-YFO census data indicate the A. guariba population declined by 86.6%, from an estimated minimum of 522 individuals to 70 individuals. However, by October 2021, the population had grown to at least 86 individuals, with an adult sex ratio (N = 53) that was female-biased (0.61). Eleven of the 13 groups being monitored systematically were reproductively active with high survivorship to 12 months of age. S. nigritus declined by 40%, from 377 to 226 individuals. The sex ratio of 33 adult S. nigritus is also female-biased (0.71), and at least 8 of 15 groups being monitored are reproductively active. C. flaviceps declined by 80%, from 85 individuals to the 15-17 individuals observed from 2017 to 2021. The female-biased adult sex ratio and presence of infants and juveniles in the A. guariba and S. nigritus groups are encouraging signs, but there is still great concern, especially for C. flaviceps. Continued monitoring of the demographics of these primates is needed as their persistence appears to still be at risk.
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Affiliation(s)
- Carla B Possamai
- Financial Sector, Muriqui Instituto de Biodiversidade-MIB-R: Euclydes Etienne Arreguy Filho, Centro Caratinga, Minas Gerais, Brazil
| | - Fabiano Rodrigues de Melo
- Departamento de Engenharia Florestal, Universidade Federal de Viçosa, MeCFauna Lab, Viçosa, Minas Gerais, Brazil
| | - Sérgio Lucena Mendes
- Departamento de Ciências Biológicas, CCHN/UFES, Vitória, Espírito Santo, Brazil.,Instituto Nacional da Mata Atlântica (INMA), Santa Teresa, Espírito Santo, Brazil
| | - Karen B Strier
- Department of Anthropology, University of Wisconsin-Madison, Madison, Wisconsin, USA
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15
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Mapping and Validation of Peptides Differentially Recognized by Antibodies from the Serum of Yellow Fever Virus-Infected or 17DD-Vaccinated Patients. Viruses 2022; 14:v14081645. [PMID: 36016268 PMCID: PMC9415205 DOI: 10.3390/v14081645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 07/12/2022] [Accepted: 07/25/2022] [Indexed: 02/01/2023] Open
Abstract
Yellow Fever disease is caused by the Yellow Fever virus (YFV), an arbovirus from the Flaviviridae family. The re-emergence of Yellow Fever (YF) was facilitated by the increasing urbanization of sylvatic areas, the wide distribution of the mosquito vector, and the low percentage of people immunized in the Americas, which caused severe outbreaks in recent years, with a high mortality rate. Therefore, serological approaches capable of discerning antibodies generated from the wild-type (YFV-WT) strain between the vaccinal strain (YFV-17DD) could facilitate vaccine coverage surveillance, enabling the development of strategies to avoid new outbreaks. In this study, peptides were designed and subjected to microarray procedures with sera collected from individuals infected by WT-YFV and 17DD–YFV of YFV during the Brazilian outbreak of YFV in 2017/2018. From 222 screened peptides, around ten could potentially integrate serological approaches aiming to differentiate vaccinated individuals from naturally infected individuals. Among those peptides, one was synthesized and validated through ELISA.
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16
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Salomón OD, Arias ARDE. The second coming of urban yellow fever in the Americas: looking the past to see the future. AN ACAD BRAS CIENC 2022; 94:e20201252. [PMID: 35730861 DOI: 10.1590/0001-3765202220201252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 03/17/2021] [Indexed: 04/13/2024] Open
Abstract
Yellow fever (YF) epizootics in South America during the 21st century have an unprecedented recorded magnitude and geographical dispersion. The YF spread progressively involved areas considered previously free of risk reaching the edge of cities with large unvaccinated populations, and urban outbreaks were frequently forecasted. We critically reviewed the initial stages and enhancing contexts of YF urban epidemics since the 17th century in the Americas, and the modeling attempts of YF epidemic risk by of Aedes-Human transmission, to find common factors that increase the probability of these events in the current scenarios. The YF urban outbreaks of the past showed as necessary conditions the multiple introduction by viremic carriers clustered in time and space, coincident with population peaks of Aedes. These conditions are not met in the current outbreaks in the Americas by sylvatic YF cycles, besides the protective impact of vector control campaigns, vaccination coverage, improved surveillance, and case management. Therefore, urban Aedes-Human YF outbreaks in the Americas are still possible but with low probability or very focal transmission, while the conditions reported in the past were avoided, and the surveillance and control measures sustained, including the vaccination of the population at risk.
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Affiliation(s)
- Oscar D Salomón
- Instituto Nacional de Medicina Tropical (INMeT), ANLIS (Administración Nacional de Laboratorios e Institutos de Salud) Dr. Carlos G. Malbrán, Av. Almafuerte, s/n, PC 3370, Puerto Iguazú, Misiones, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz, 2290, PC1425FQB, Ciudad Autónoma de Buenos Aires, Argentina
| | - Antonieta Rojas DE Arias
- Centro para el Desarrollo de la Investigación Científica (CEDIC), Manduvira, 635 e/15 de Agosto y O` Leary, PC1255, Asunción, Paraguay
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17
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de Oliveira Figueiredo P, Stoffella-Dutra AG, Costa GB, de Oliveira JS, Amaral CD, Alves PA, Filho JDA, Paz GF, Tonelli GB, Kroon EG, Drumond BP, Paglia AP, de Oliveira DB, de Souza Trindade G. Absence of yellow fever virus circulation in wildlife rodents from Brazil. Braz J Microbiol 2022; 53:647-654. [PMID: 35133637 PMCID: PMC9151931 DOI: 10.1007/s42770-022-00688-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 01/28/2022] [Indexed: 02/01/2023] Open
Abstract
Yellow fever (YF), caused by the yellow fever virus (YFV), is an emerging viral zoonosis that affects humans and non-human primates (NHP). In South America, YF is naturally maintained through enzootic/sylvatic cycles involving NHPs and mosquitoes (Haemagogus and Sabethes). In this study, we retrospectively analyzed wildlife rodents to better understand their role in a potential alternative YF sylvatic cycle. The plaque reduction neutralization test was performed to detect anti-YFV antibodies, while qPCR targeting the NS5 region of flaviviruses and standard PCR targeting the CprM region were applied to detect YFV RNA in tissue and blood samples. YFV was not evidenced in any of the tested samples. These findings provide additional information regarding sylvatic YFV and emphasize the importance of YFV surveillance in wild animals as potential reservoirs/hosts given the well-established enzootic cycle in the studied areas, mainly in the Atlantic Forest.
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Affiliation(s)
- Poliana de Oliveira Figueiredo
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Ana Gabriella Stoffella-Dutra
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil.
| | - Galileu Barbosa Costa
- Departamento de Ciências da Saúde, Universidade Estadual de Santa Cruz, Campus Soane Nazaré de Andrade, Rodovia Jorge Amado, Km 16, Salobrinho, Ilhéus, BA, 45662-900, Brazil.
| | - Jaqueline Silva de Oliveira
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Carolina Dourado Amaral
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Pedro Augusto Alves
- Grupo de Imunologia de Doenças Virais, Instituto René Rachou, Fiocruz-Minas, Belo Horizonte, MG, Brazil
| | | | - Gustavo Fontes Paz
- Grupo de Estudos em Leishmanioses, Instituto René Rachou, Fiocruz-Minas, Belo Horizonte, MG, Brazil
| | - Gabriel Barbosa Tonelli
- Grupo de Estudos em Leishmanioses, Instituto René Rachou, Fiocruz-Minas, Belo Horizonte, MG, Brazil
| | - Erna Geessien Kroon
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Betânia Paiva Drumond
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Adriano Pereira Paglia
- Laboratório de Ecologia e Conservação, Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Danilo Bretas de Oliveira
- Centro Integrado de Pesquisa em Saúde, Faculdade de Medicina, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
| | - Giliane de Souza Trindade
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil.
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18
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Moreira Salles AP, de Seixas Santos Nastri AC, Ho YL, Vilas Boas Casadio L, Emanuel Amgarten D, Justo Arévalo S, Soares Gomes-Gouvea M, Jose Carrilho F, de Mello Malta F, Rebello Pinho JR. Updating the Phylodynamics of Yellow Fever Virus 2016-2019 Brazilian Outbreak With New 2018 and 2019 São Paulo Genomes. Front Microbiol 2022; 13:811318. [PMID: 35633726 PMCID: PMC9132216 DOI: 10.3389/fmicb.2022.811318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 02/16/2022] [Indexed: 11/19/2022] Open
Abstract
The recent outbreak of yellow fever (YF) in São Paulo during 2016-2019 has been one of the most severe in the last decades, spreading to areas with low vaccine coverage. The aim of this study was to assess the genetic diversity of the yellow fever virus (YFV) from São Paulo 2016-2019 outbreak, integrating the available genomic data with new genomes from patients from the Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP). Using phylodynamics, we proposed the existence of new IE subclades, described their sequence signatures, and determined their locations and time of origin. Plasma or urine samples from acute severe YF cases (n = 56) with polymerase chain reaction (PCR) positive to YFV were submitted to viral genome amplification using 12 sets of primers. Thirty-nine amplified genomes were subsequently sequenced using next-generation sequencing (NGS). These 39 sequences, together with all the complete genomes publicly available, were aligned and used to determine nucleotide/amino acids substitutions and perform phylogenetic and phylodynamic analysis. All YFV genomes generated in this study belonged to the genotype South American I subgroup E. Twenty-one non-synonymous substitutions were identified among the new generated genomes. We analyzed two major clades of the genotypes IE, IE1, and IE2 and proposed the existence of subclades based on their sequence signatures. Also, we described the location and time of origin of these subclades. Overall, our findings provide an overview of YFV genomic characterization and phylodynamics of the 2016-2019 outbreak contributing to future virological and epidemiological studies.
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Affiliation(s)
- Ana Paula Moreira Salles
- Department of Gastroenterology (LIM07), Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
- Clinical Laboratory of Hospital Israelita Albert Einstein, São Paulo, Brazil
| | | | - Yeh-Li Ho
- Department of Infectious and Parasitic Diseases, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Luciana Vilas Boas Casadio
- Department of Infectious and Parasitic Diseases, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Deyvid Emanuel Amgarten
- Clinical Laboratory of Hospital Israelita Albert Einstein, São Paulo, Brazil
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
| | - Santiago Justo Arévalo
- Clinical Laboratory of Hospital Israelita Albert Einstein, São Paulo, Brazil
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
- Facultad de Ciencias Biológicas, Universidad Ricardo Palma, Lima, Peru
| | | | - Flair Jose Carrilho
- Department of Gastroenterology (LIM07), Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Fernanda de Mello Malta
- Department of Gastroenterology (LIM07), Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
- Clinical Laboratory of Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - João Renato Rebello Pinho
- Department of Gastroenterology (LIM07), Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
- Clinical Laboratory of Hospital Israelita Albert Einstein, São Paulo, Brazil
- Division of Clinical Laboratories (LIM 03), Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
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Medeiros-Sousa AR, Laporta GZ, Mucci LF, Marrelli MT. Epizootic dynamics of yellow fever in forest fragments: An agent-based model to explore the influence of vector and host parameters. Ecol Modell 2022. [DOI: 10.1016/j.ecolmodel.2022.109884] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Gianchecchi E, Cianchi V, Torelli A, Montomoli E. Yellow Fever: Origin, Epidemiology, Preventive Strategies and Future Prospects. Vaccines (Basel) 2022; 10:372. [PMID: 35335004 PMCID: PMC8955180 DOI: 10.3390/vaccines10030372] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/15/2022] [Accepted: 02/22/2022] [Indexed: 12/10/2022] Open
Abstract
Yellow fever (YF) virus still represents a major threat in low resource countries in both South America and Africa despite the presence of an effective vaccine. YF outbreaks are not only due to insufficient vaccine coverage for insufficient vaccine supply, but also to the increase in people without history of vaccination living in endemic areas. Globalization, continuous population growth, urbanization associated with inadequate public health infrastructure, and climate changes constitute important promoting factors for the spread of this virus to tropical and subtropical areas in mosquito-infested regions capable of spreading the disease. In the present review, we focus on the origin of the virus and its transmission, representing two debated topics throughout the nineteenth century, going deeply into the history of YF vaccines until the development of the vaccine still used nowadays. Besides surveillance, we highlight the urgent need of routine immunization and vaccination campaigns associated to diverse and innovative mosquito control technologies in endemic areas for YF virus in order to minimize the risk of new YF outbreaks and the global burden of YF in the future.
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Affiliation(s)
- Elena Gianchecchi
- VisMederi Srl, Strada del Petriccio e Belriguardo, 35, 53100 Siena, Italy; (V.C.); (E.M.)
| | - Virginia Cianchi
- VisMederi Srl, Strada del Petriccio e Belriguardo, 35, 53100 Siena, Italy; (V.C.); (E.M.)
| | | | - Emanuele Montomoli
- VisMederi Srl, Strada del Petriccio e Belriguardo, 35, 53100 Siena, Italy; (V.C.); (E.M.)
- Department of Molecular and Developmental Medicine, University of Siena, Via Aldo 3, 53100 Siena, Italy
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21
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Li SL, Acosta AL, Hill SC, Brady OJ, de Almeida MAB, Cardoso JDC, Hamlet A, Mucci LF, Telles de Deus J, Iani FCM, Alexander NS, Wint GRW, Pybus OG, Kraemer MUG, Faria NR, Messina JP. Mapping environmental suitability of Haemagogus and Sabethes spp. mosquitoes to understand sylvatic transmission risk of yellow fever virus in Brazil. PLoS Negl Trop Dis 2022; 16:e0010019. [PMID: 34995277 PMCID: PMC8797211 DOI: 10.1371/journal.pntd.0010019] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 01/28/2022] [Accepted: 11/23/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Yellow fever (YF) is an arboviral disease which is endemic to Brazil due to a sylvatic transmission cycle maintained by infected mosquito vectors, non-human primate (NHP) hosts, and humans. Despite the existence of an effective vaccine, recent sporadic YF epidemics have underscored concerns about sylvatic vector surveillance, as very little is known about their spatial distribution. Here, we model and map the environmental suitability of YF's main vectors in Brazil, Haemagogus spp. and Sabethes spp., and use human population and NHP data to identify locations prone to transmission and spillover risk. METHODOLOGY/PRINCIPAL FINDINGS We compiled a comprehensive set of occurrence records on Hg. janthinomys, Hg. leucocelaenus, and Sabethes spp. from 1991-2019 using primary and secondary data sources. Linking these data with selected environmental and land-cover variables, we adopted a stacked regression ensemble modelling approach (elastic-net regularized GLM, extreme gradient boosted regression trees, and random forest) to predict the environmental suitability of these species across Brazil at a 1 km x 1 km resolution. We show that while suitability for each species varies spatially, high suitability for all species was predicted in the Southeastern region where recent outbreaks have occurred. By integrating data on NHP host reservoirs and human populations, our risk maps further highlight municipalities within the region that are prone to transmission and spillover. CONCLUSIONS/SIGNIFICANCE Our maps of sylvatic vector suitability can help elucidate potential locations of sylvatic reservoirs and be used as a tool to help mitigate risk of future YF outbreaks and assist in vector surveillance. Furthermore, at-risk regions identified from our work could help disease control and elucidate gaps in vaccination coverage and NHP host surveillance.
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Affiliation(s)
- Sabrina L. Li
- School of Geography and the Environment, University of Oxford, Oxford, United Kingdom
- * E-mail: (SLL); (JPM)
| | - André L. Acosta
- Departamento de Ecologia, Instituto de Biociências, Laboratório de Ecologia de Paisagens e Conservação—LEPAC, Universidade de São Paulo, São Paulo, Brazil
| | - Sarah C. Hill
- Department of Pathobiology and Population Sciences, Royal Veterinary College London, London, United Kingdom
| | - Oliver J. Brady
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, United Kingdom
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Marco A. B. de Almeida
- State Centre of Health Surveillance, Rio Grande do Sul State Health Secretariat, Rio Grande do Sul, Brazil
| | - Jader da C. Cardoso
- State Centre of Health Surveillance, Rio Grande do Sul State Health Secretariat, Rio Grande do Sul, Brazil
| | - Arran Hamlet
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, United Kingdom
| | - Luis F. Mucci
- Superintendence for Endemic Diseases Control, São Paulo State Health Secretariat, São Paulo, Brazil
| | - Juliana Telles de Deus
- Superintendence for Endemic Diseases Control, São Paulo State Health Secretariat, São Paulo, Brazil
| | | | - Neil S. Alexander
- Environmental Research Group Oxford, c/o Department of Zoology, University of Oxford, Oxford, United Kingdom
| | - G. R. William Wint
- Environmental Research Group Oxford, c/o Department of Zoology, University of Oxford, Oxford, United Kingdom
| | - Oliver G. Pybus
- Department of Pathobiology and Population Sciences, Royal Veterinary College London, London, United Kingdom
- Department of Zoology, University of Oxford, Oxford, United Kingdom
| | | | - Nuno R. Faria
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, United Kingdom
- Department of Zoology, University of Oxford, Oxford, United Kingdom
- Departamento de Molestias Infecciosas e Parasitarias & Instituto de Medicina Tropical da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Jane P. Messina
- School of Geography and the Environment, University of Oxford, Oxford, United Kingdom
- Oxford School of Global and Area Studies, University of Oxford, Oxford, United Kingdom
- * E-mail: (SLL); (JPM)
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22
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Siqueira PC, Catão RDC, Gava C, Maciel ELN, Prado TND. [Spatial-temporal diffusion of yellow fever in a state in Southeast Brazil in 2017]. CAD SAUDE PUBLICA 2021; 37:e00127620. [PMID: 34669767 DOI: 10.1590/0102-311x00127620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 01/12/2021] [Indexed: 11/21/2022] Open
Abstract
The objective was to analyze the diffusion of cases of yellow fever in time and space in the epidemic of 2017 in the state of Espírito Santo, Brazil. An ecological observational study was performed with spatial analysis of yellow fever cases. Georeferencing of information and spatial analysis used the digital grid for the state of Espírito Santo, divided into 78 municipalities (counties), using the Arcgis software, 10.3. Geostatistical analysis was performed using the ordinary kriging function. The study found an incidence of 4.85/100,000 inhabitants of sylvatic yellow fever in Espírito Santo in 2017, with 29.74% case-fatality. Sylvatic yellow fever cases were distributed across 34 of the state's 78 municipalities, representing 43% of its territory. The temporal distribution of reported yellow fever cases in the current study occurred from the 1st to the 19th Epidemiological Weeks (EW). The geostatistical spatial analysis via ordinary kriging demonstrated spatial diffusion by yellow fever contagion among the municipalities in the state of Espírito Santo, with spatial continuity. The disease emerged in the state in the EW 1 through municipalities bordering on the state of Minas Gerais. Geoprocessing showed that yellow fever reached the state of Espírito Santo through the municipalities bordering on the state of Minas Gerais, moving eastward in the state and reaching the Atlantic coastline. There was a higher concentration of cases and persistence in the state's Central and Metropolitan regions, which have areas of Atlantic Forest, showing a pattern of diffusion continuity by contagion.
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Affiliation(s)
| | | | - Caroline Gava
- Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz, Rio de Janeiro, Brasil
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23
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Andrade MDS, Campos FS, Campos AAS, Abreu FVS, Melo FL, Sevá ADP, Cardoso JDC, Dos Santos E, Born LC, da Silva CMD, Müller NFD, de Oliveira CH, da Silva AJJ, Simonini-Teixeira D, Bernal-Valle S, Mares-Guia MAMM, Albuquerque GR, Romano APM, Franco AC, Ribeiro BM, Roehe PM, de Almeida MAB. Real-Time Genomic Surveillance during the 2021 Re-Emergence of the Yellow Fever Virus in Rio Grande do Sul State, Brazil. Viruses 2021; 13:v13101976. [PMID: 34696408 PMCID: PMC8539658 DOI: 10.3390/v13101976] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 09/23/2021] [Accepted: 09/28/2021] [Indexed: 02/06/2023] Open
Abstract
The 2021 re-emergence of yellow fever in non-human primates in the state of Rio Grande do Sul (RS), southernmost Brazil, resulted in the death of many howler monkeys (genus Alouatta) and led the state to declare a Public Health Emergency of State Importance, despite no human cases reported. In this study, near-complete genomes of yellow fever virus (YFV) recovered from the outbreak were sequenced and examined aiming at a better understanding of the phylogenetic relationships and the spatio-temporal dynamics of the virus distribution. Our results suggest that the most likely sequence of events involved the reintroduction of YFV from the state of São Paulo to RS through the states of Paraná and Santa Catarina, by the end of 2020. These findings reinforce the role of genomic surveillance in determining the pathways of distribution of the virus and in providing references for the implementation of preventive measures for populations in high risk areas.
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Affiliation(s)
- Miguel de S. Andrade
- Baculovirus Laboratory, Department of Cell Biology, Institute of Biological Sciences, University of Brasilia, Brasília 70910-900, Distrito Federal, Brazil; (M.d.S.A.); (F.L.M.); (B.M.R.)
| | - Fabrício S. Campos
- Bioinformatics and Biotechnology Laboratory, Campus of Gurupi, Federal University of Tocantins, Gurupi 77410-570, Tocantins, Brazil;
| | - Aline A. S. Campos
- State Center of Health Surveillance, Rio Grande do Sul State Health Department, Porto Alegre 90610-000, Rio Grande do Sul, Brazil; (A.A.S.C.); (J.d.C.C.); (E.d.S.); (L.C.B.); (C.M.D.d.S.)
| | - Filipe V. S. Abreu
- Insect Behavior Laboratory, Federal Institute of Northern Minas Gerais, Salinas 39560-000, Minas Gerais, Brazil; (F.V.S.A.); (C.H.d.O.); (A.J.J.d.S.)
| | - Fernando L. Melo
- Baculovirus Laboratory, Department of Cell Biology, Institute of Biological Sciences, University of Brasilia, Brasília 70910-900, Distrito Federal, Brazil; (M.d.S.A.); (F.L.M.); (B.M.R.)
| | - Anaiá da P. Sevá
- Department of Agricultural and Environmental Sciences, Santa Cruz State University, Ilhéus 45662-900, Bahia, Brazil; (A.d.P.S.); (D.S.-T.); (S.B.-V.); (G.R.A.)
| | - Jader da C. Cardoso
- State Center of Health Surveillance, Rio Grande do Sul State Health Department, Porto Alegre 90610-000, Rio Grande do Sul, Brazil; (A.A.S.C.); (J.d.C.C.); (E.d.S.); (L.C.B.); (C.M.D.d.S.)
| | - Edmilson Dos Santos
- State Center of Health Surveillance, Rio Grande do Sul State Health Department, Porto Alegre 90610-000, Rio Grande do Sul, Brazil; (A.A.S.C.); (J.d.C.C.); (E.d.S.); (L.C.B.); (C.M.D.d.S.)
| | - Lucas C. Born
- State Center of Health Surveillance, Rio Grande do Sul State Health Department, Porto Alegre 90610-000, Rio Grande do Sul, Brazil; (A.A.S.C.); (J.d.C.C.); (E.d.S.); (L.C.B.); (C.M.D.d.S.)
| | - Cláudia M. D. da Silva
- State Center of Health Surveillance, Rio Grande do Sul State Health Department, Porto Alegre 90610-000, Rio Grande do Sul, Brazil; (A.A.S.C.); (J.d.C.C.); (E.d.S.); (L.C.B.); (C.M.D.d.S.)
| | - Nicolas F. D. Müller
- Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre 90050-170, Rio Grande do Sul, Brazil; (N.F.D.M.); (A.C.F.); (P.M.R.)
| | - Cirilo H. de Oliveira
- Insect Behavior Laboratory, Federal Institute of Northern Minas Gerais, Salinas 39560-000, Minas Gerais, Brazil; (F.V.S.A.); (C.H.d.O.); (A.J.J.d.S.)
| | - Alex J. J. da Silva
- Insect Behavior Laboratory, Federal Institute of Northern Minas Gerais, Salinas 39560-000, Minas Gerais, Brazil; (F.V.S.A.); (C.H.d.O.); (A.J.J.d.S.)
| | - Danilo Simonini-Teixeira
- Department of Agricultural and Environmental Sciences, Santa Cruz State University, Ilhéus 45662-900, Bahia, Brazil; (A.d.P.S.); (D.S.-T.); (S.B.-V.); (G.R.A.)
| | - Sofía Bernal-Valle
- Department of Agricultural and Environmental Sciences, Santa Cruz State University, Ilhéus 45662-900, Bahia, Brazil; (A.d.P.S.); (D.S.-T.); (S.B.-V.); (G.R.A.)
| | - Maria A. M. M. Mares-Guia
- Flavivirus Laboratory, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro 21040-360, Rio de Janeiro, Brazil;
| | - George R. Albuquerque
- Department of Agricultural and Environmental Sciences, Santa Cruz State University, Ilhéus 45662-900, Bahia, Brazil; (A.d.P.S.); (D.S.-T.); (S.B.-V.); (G.R.A.)
| | - Alessandro P. M. Romano
- General Coordination of Arbovirus Surveillance, Ministry of Health, Brasília 70058-900, Distrito Federal, Brazil;
| | - Ana C. Franco
- Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre 90050-170, Rio Grande do Sul, Brazil; (N.F.D.M.); (A.C.F.); (P.M.R.)
| | - Bergmann M. Ribeiro
- Baculovirus Laboratory, Department of Cell Biology, Institute of Biological Sciences, University of Brasilia, Brasília 70910-900, Distrito Federal, Brazil; (M.d.S.A.); (F.L.M.); (B.M.R.)
| | - Paulo M. Roehe
- Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre 90050-170, Rio Grande do Sul, Brazil; (N.F.D.M.); (A.C.F.); (P.M.R.)
| | - Marco A. B. de Almeida
- State Center of Health Surveillance, Rio Grande do Sul State Health Department, Porto Alegre 90610-000, Rio Grande do Sul, Brazil; (A.A.S.C.); (J.d.C.C.); (E.d.S.); (L.C.B.); (C.M.D.d.S.)
- Correspondence:
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Re-emergence of yellow fever in the neotropics - quo vadis? Emerg Top Life Sci 2021; 4:399-410. [PMID: 33258924 PMCID: PMC7733675 DOI: 10.1042/etls20200187] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/05/2020] [Accepted: 11/09/2020] [Indexed: 02/02/2023]
Abstract
Yellow fever virus (YFV) is the etiological agent of yellow fever (YF), an acute hemorrhagic vector-borne disease with a significant impact on public health, is endemic across tropical regions in Africa and South America. The virus is maintained in two ecologically and evolutionary distinct transmission cycles: an enzootic, sylvatic cycle, where the virus circulates between arboreal Aedes species mosquitoes and non-human primates, and a human or urban cycle, between humans and anthropophilic Aedes aegypti mosquitoes. While the urban transmission cycle has been eradicated by a highly efficacious licensed vaccine, the enzootic transmission cycle is not amenable to control interventions, leading to recurrent epizootics and spillover outbreaks into human populations. The nature of YF transmission dynamics is multifactorial and encompasses a complex system of biotic, abiotic, and anthropogenic factors rendering predictions of emergence highly speculative. The recent outbreaks in Africa and Brazil clearly remind us of the significant impact YF emergence events pose on human and animal health. The magnitude of the Brazilian outbreak and spillover in densely populated areas outside the recommended vaccination coverage areas raised the specter of human — to — human transmission and re-establishment of enzootic cycles outside the Amazon basin. Herein, we review the factors that influence the re-emergence potential of YFV in the neotropics and offer insights for a constellation of coordinated approaches to better predict and control future YF emergence events.
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25
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Diffusion of sylvatic yellow fever in the state of São Paulo, Brazil. Sci Rep 2021; 11:16277. [PMID: 34381111 PMCID: PMC8358007 DOI: 10.1038/s41598-021-95539-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/26/2021] [Indexed: 11/08/2022] Open
Abstract
We investigated the sylvatic yellow fever (SYF) diffusion process in São Paulo (SP) between 2016 and 2019. We developed an ecological study of SYF through autochthonous human cases and epizootics of non-human primates (NHPs) that were spatiotemporally evaluated. We used kriging to obtain maps with isochrones representative of the evolution of the outbreak and characterized its diffusion pattern. We confirmed 648 human cases of SYF in SP, with 230 deaths and 843 NHP epizootics. Two outbreak waves were identified: one from West to East (2016 and 2017), and another from the Campinas region to the municipalities bordering Rio de Janeiro, Minas Gerais, and Paraná and those of the SP coast (2017-2019). The SYF outbreak diffusion process was by contagion. The disease did not exhibit jumps between municipalities, indicating that the mosquitoes and NHPs were responsible for transmitting the virus. There were not enough vaccines to meet the population at risk; hence, health authorities used information about the epizootic occurrence in NHPs in forest fragments to identify priority populations for vaccination.
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26
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Reemergence of Yellow Fever in Brazil: The Role of Distinct Landscape Fragmentation Thresholds. JOURNAL OF ENVIRONMENTAL AND PUBLIC HEALTH 2021; 2021:8230789. [PMID: 34341668 PMCID: PMC8325590 DOI: 10.1155/2021/8230789] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 07/17/2021] [Indexed: 11/17/2022]
Abstract
Yellow Fever Virus (YFV) reemergence in Brazil was followed by human suffering and the loss of biodiversity of neotropical simians on the Atlantic coast. The underlying mechanisms were investigated with special focus on distinct landscape fragmentation thresholds in the affected municipalities. An ecological study in epidemiology is employed to assess the statistical relationship between events of YFV and forest fragmentation in municipal landscapes. Negative binomial regression model showed that highly fragmented forest cover was associated with an 85% increase of events of YFV in humans and simians (RR = 1.85, CI 95% = 1.24–2.75, p=0.003) adjusted by vaccine coverage, population size, and municipality area. Intermediate levels of forest cover combined with higher levels of forest edge densities contribute to the YFV dispersion and the exponential growth of YF cases. Strategies for forest conservation are necessary for the control and prevention of YF and other zoonotic diseases that can spillover from the fragmented forest remains to populated cities of the Brazilian Atlantic coast.
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27
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Viral and Prion Infections Associated with Central Nervous System Syndromes in Brazil. Viruses 2021; 13:v13071370. [PMID: 34372576 PMCID: PMC8310075 DOI: 10.3390/v13071370] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/05/2021] [Accepted: 05/11/2021] [Indexed: 12/12/2022] Open
Abstract
Virus-induced infections of the central nervous system (CNS) are among the most serious problems in public health and can be associated with high rates of morbidity and mortality, mainly in low- and middle-income countries, where these manifestations have been neglected. Typically, herpes simplex virus 1 and 2, varicella-zoster, and enterovirus are responsible for a high number of cases in immunocompetent hosts, whereas other herpesviruses (for example, cytomegalovirus) are the most common in immunocompromised individuals. Arboviruses have also been associated with outbreaks with a high burden of neurological disorders, such as the Zika virus epidemic in Brazil. There is a current lack of understanding in Brazil about the most common viruses involved in CNS infections. In this review, we briefly summarize the most recent studies and findings associated with the CNS, in addition to epidemiological data that provide extensive information on the circulation and diversity of the most common neuro-invasive viruses in Brazil. We also highlight important aspects of the prion-associated diseases. This review provides readers with better knowledge of virus-associated CNS infections. A deeper understanding of these infections will support the improvement of the current surveillance strategies to allow the timely monitoring of the emergence/re-emergence of neurotropic viruses.
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de Azevedo Fernandes NCC, Guerra JM, Díaz-Delgado J, Cunha MS, Saad LD, Iglezias SD, Ressio RA, Dos Santos Cirqueira C, Kanamura CT, Jesus IP, Maeda AY, Vasami FGS, de Carvalho J, de Araújo LJT, de Souza RP, Nogueira JS, Spinola RMF, Catão-Dias JL. Differential Yellow Fever Susceptibility in New World Nonhuman Primates, Comparison with Humans, and Implications for Surveillance. Emerg Infect Dis 2021; 27:47-56. [PMID: 33350931 PMCID: PMC7774563 DOI: 10.3201/eid2701.191220] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
A major outbreak of yellow fever (YF) occurred in Brazil during 2016-2018. Epizootics in New World nonhuman primates are sentinel events for YF virus circulation. However, genus-specific susceptibilities and suitability for YF surveillance remain poorly understood. We obtained and compared epidemiologic, histopathologic, immunohistochemical, and molecular results from 93 human and 1,752 primate cases submitted during the recent YF outbreak in Brazil (2017), with the support of the Brazilian National YF Surveillance Program. We detected heterogeneous YF-associated profiles among the various genera of primates we analyzed. Alouatta primates were the most reliable sentinel; Sapajus and Callicebus primates had higher viral loads but lower proportional mortality rates. Callithrix primates were the least sensitive, showing lower viral loads, lower proportional mortality rates, and no demonstrable YF virus antigen or extensive lesions in liver, despite detectable viral RNA. These differences in susceptibility, viral load, and mortality rates should be considered in strategic surveillance of epizootics and control measures for YF.
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29
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Ndeffo-Mbah ML, Pandey A. Global Risk and Elimination of Yellow Fever Epidemics. J Infect Dis 2021; 221:2026-2034. [PMID: 31545372 DOI: 10.1093/infdis/jiz375] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 07/16/2019] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Yellow fever (YF) is a vector-borne viral hemorrhagic disease endemic in Africa and Latin America. In 2016, the World Health Organization (WHO) developed the Eliminate YF Epidemics strategy aiming at eliminating YF epidemics by 2026. METHODS We developed a spatiotemporal model of YF, accounting for the impact of temperature, vector distribution, and socioeconomic factors on disease transmission. We validated our model against previous estimates of YF basic reproductive number (R0). We used the model to estimate global risk of YF outbreaks and vaccination efforts needed to achieve elimination of YF epidemics. RESULTS We showed that the global risk of YF outbreaks is highly heterogeneous. High-risk transmission areas (R0 > 6) are mainly found in West Africa and the Equatorial region of Latin America. We showed that vaccination coverage needed to eliminate YF epidemics in an endemic country varies substantially between districts. In many endemic countries, a 90% vaccination coverage is needed to achieve elimination. However, in some high-risk districts in Africa, a 95% coverage may be required. CONCLUSIONS Global elimination of YF epidemics requires higher population-level immunity than the 80% coverage recommended by the WHO. Optimal YF vaccination strategy should be tailored to the risk profile of each endemic country.
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Affiliation(s)
- Martial L Ndeffo-Mbah
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences.,Department of Epidemiology and Biostatistics, School of Public Health, Texas A&M University, College Station
| | - Abhishek Pandey
- Center for Infectious Disease Modeling and Analysis, Yale School of Public Health, New Haven, Connecticut
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30
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Coding-Complete Genome Sequence of a Yellow Fever Virus Isolated from a Baby Howler Monkey ( Alouatta caraya) from São Paulo State, Brazil, in 2016. Microbiol Resour Announc 2021; 10:10/1/e01244-20. [PMID: 33414341 PMCID: PMC8407717 DOI: 10.1128/mra.01244-20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We report a coding-complete sequence of a yellow fever virus, strain JabSPM02, containing the 3′ untranslated region and all coding regions. The virus was recovered from an infected howler monkey from a rural area in São Paulo State, Brazil. Our findings show that it belongs to the South America 1E genotype. We report a coding-complete sequence of a yellow fever virus, strain JabSPM02, containing the 3′ untranslated region and all coding regions. The virus was recovered from an infected howler monkey from a rural area in São Paulo State, Brazil. Our findings show that it belongs to the South America 1E genotype.
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Hamlet A, Gaythorpe KAM, Garske T, Ferguson NM. Seasonal and inter-annual drivers of yellow fever transmission in South America. PLoS Negl Trop Dis 2021; 15:e0008974. [PMID: 33428623 PMCID: PMC7822559 DOI: 10.1371/journal.pntd.0008974] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 01/22/2021] [Accepted: 11/11/2020] [Indexed: 11/18/2022] Open
Abstract
In the last 20 years yellow fever (YF) has seen dramatic changes to its incidence and geographic extent, with the largest outbreaks in South America since 1940 occurring in the previously unaffected South-East Atlantic coast of Brazil in 2016-2019. While habitat fragmentation and land-cover have previously been implicated in zoonotic disease, their role in YF has not yet been examined. We examined the extent to which vegetation, land-cover, climate and host population predicted the numbers of months a location reported YF per year and by each month over the time-period. Two sets of models were assessed, one looking at interannual differences over the study period (2003-2016), and a seasonal model looking at intra-annual differences by month, averaging over the years of the study period. Each was fit using hierarchical negative-binomial regression in an exhaustive model fitting process. Within each set, the best performing models, as measured by the Akaike Information Criterion (AIC), were combined to create ensemble models to describe interannual and seasonal variation in YF. The models reproduced the spatiotemporal heterogeneities in YF transmission with coefficient of determination (R2) values of 0.43 (95% CI 0.41-0.45) for the interannual model and 0.66 (95% CI 0.64-0.67) for the seasonal model. For the interannual model, EVI, land-cover and vegetation heterogeneity were the primary contributors to the variance explained by the model, and for the seasonal model, EVI, day temperature and rainfall amplitude. Our models explain much of the spatiotemporal variation in YF in South America, both seasonally and across the period 2003-2016. Vegetation type (EVI), heterogeneity in vegetation (perhaps a proxy for habitat fragmentation) and land cover explain much of the trends in YF transmission seen. These findings may help understand the recent expansions of the YF endemic zone, as well as to the highly seasonal nature of YF.
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Affiliation(s)
- Arran Hamlet
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, United Kingdom
| | - Katy A. M. Gaythorpe
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, United Kingdom
| | - Tini Garske
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, United Kingdom
| | - Neil M. Ferguson
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, United Kingdom
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Carro SD, Cherry S. Beyond the Surface: Endocytosis of Mosquito-Borne Flaviviruses. Viruses 2020; 13:E13. [PMID: 33374822 PMCID: PMC7824540 DOI: 10.3390/v13010013] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/16/2020] [Accepted: 12/19/2020] [Indexed: 02/06/2023] Open
Abstract
Flaviviruses are a group of positive-sense RNA viruses that are primarily transmitted through arthropod vectors and are capable of causing a broad spectrum of diseases. Many of the flaviviruses that are pathogenic in humans are transmitted specifically through mosquito vectors. Over the past century, many mosquito-borne flavivirus infections have emerged and re-emerged, and are of global importance with hundreds of millions of infections occurring yearly. There is a need for novel, effective, and accessible vaccines and antivirals capable of inhibiting flavivirus infection and ameliorating disease. The development of therapeutics targeting viral entry has long been a goal of antiviral research, but most efforts are hindered by the lack of broad-spectrum potency or toxicities associated with on-target effects, since many host proteins necessary for viral entry are also essential for host cell biology. Mosquito-borne flaviviruses generally enter cells by clathrin-mediated endocytosis (CME), and recent studies suggest that a subset of these viruses can be internalized through a specialized form of CME that has additional dependencies distinct from canonical CME pathways, and antivirals targeting this pathway have been discovered. In this review, we discuss the role and contribution of endocytosis to mosquito-borne flavivirus entry as well as consider past and future efforts to target endocytosis for therapeutic interventions.
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Affiliation(s)
| | - Sara Cherry
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA;
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33
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Fernandes NCCDA, Guerra JM, Cunha MS, Beraldo KRF, Ressio RA, Cirqueira CDS, Agostini TLD, de Camargo JP, Landi NCSF, Saad LDC, Spinola RMF, de Paula RAC, Sanches TC, Rivas L, Catão-Dias JL. Yellow fever surveillance challenge: Investigation of a marmoset non-autochthonous case. Acta Trop 2020; 212:105702. [PMID: 32971069 DOI: 10.1016/j.actatropica.2020.105702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/08/2020] [Accepted: 09/08/2020] [Indexed: 11/18/2022]
Abstract
Yellow fever (YF) surveillance in Brazil is focused mainly on the detection of epizootic events regarding New World non-human primates (NWNHP). We present a challenging case of a Callitrichidae (Callithrix spp) kept as a domiciliated pet that lived in the urban area of São Paulo municipality and was positive to YF virus by RT-qPCR and immunohistochemistry. After investigation, it was the first occurrence of non-autochthonous YF case of NWNHP described, with probable place of infection in the North shore of São Paulo state. This case illustrates the importance of coordinated laboratorial and field actions, and risks posed by transit of wildlife.
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Affiliation(s)
- Natália C C de A Fernandes
- Centro de Patologia, Instituto Adolfo Lutz, São Paulo, Brasil; Laboratório de Patologia Comparada de Animais Selvagens, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brasil.
| | | | - Mariana S Cunha
- Centro de Virologia, Instituto Adolfo Lutz, São Paulo, Brasil
| | | | | | | | - Tatiana Lang D' Agostini
- Centro de Vigilância Epidemiológica "Dr Alexandre Vranjac", Coordenadoria de Controle de Doenças, Secretaria da Saúde, São Paulo, Brasil
| | - Jessica Pires de Camargo
- Centro de Vigilância Epidemiológica "Dr Alexandre Vranjac", Coordenadoria de Controle de Doenças, Secretaria da Saúde, São Paulo, Brasil
| | - Natália Cristina S F Landi
- Centro de Vigilância Epidemiológica "Dr Alexandre Vranjac", Coordenadoria de Controle de Doenças, Secretaria da Saúde, São Paulo, Brasil
| | - Leila Del Castillo Saad
- Centro de Vigilância Epidemiológica "Dr Alexandre Vranjac", Coordenadoria de Controle de Doenças, Secretaria da Saúde, São Paulo, Brasil
| | - Roberta Maria Fernandes Spinola
- Centro de Vigilância Epidemiológica "Dr Alexandre Vranjac", Coordenadoria de Controle de Doenças, Secretaria da Saúde, São Paulo, Brasil
| | - Regiane A C de Paula
- Centro de Vigilância Epidemiológica "Dr Alexandre Vranjac", Coordenadoria de Controle de Doenças, Secretaria da Saúde, São Paulo, Brasil
| | | | - Luana Rivas
- Divisão da Fauna Silvestre, Prefeitura Municipal de São Paulo (PMSP), São Paulo, Brasil
| | - José Luiz Catão-Dias
- Laboratório de Patologia Comparada de Animais Selvagens, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brasil
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34
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Bifani AM, Ong EZ, de Alwis R. Vaccination and Therapeutics: Responding to the Changing Epidemiology of Yellow Fever. CURRENT TREATMENT OPTIONS IN INFECTIOUS DISEASES 2020; 12:398-409. [PMID: 33173445 PMCID: PMC7644428 DOI: 10.1007/s40506-020-00237-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/20/2020] [Indexed: 12/24/2022]
Abstract
At the turn of the nineteenth century, yellow fever (YF) was considered the most dangerous infectious disease with high case fatality. Subsequent, mass vaccination campaigns coupled with widespread elimination of the YF mosquito vector significantly decreased YF cases and reduced outbreaks to the tropical and subtropical forested regions of Africa and South America. However, recent (2016) large outbreaks in Angola, Democratic Republic of Congo (DRC), and South-Eastern Brazil, where previously had been demarcated as low-risk regions, have highlighted the possibility of a rapidly changing epidemiology and the potential re-emergence of yellow fever virus (YFV). Furthermore, the first-ever importation of YFV into Asia has highlighted the potential fear of YFV emerging as a global threat. In this review, we describe the changing epidemiology of YF outbreaks, and highlight the use of public health policies, therapeutics, and vaccination as tools to help eliminate future YFV outbreaks.
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Affiliation(s)
- Amanda Makha Bifani
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore
| | - Eugenia Z. Ong
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore
- Viral Research and Experimental Medicine Centre @ SingHealth Duke-NUS (VIREMiCS), Singapore, Singapore
| | - Ruklanthi de Alwis
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore
- Viral Research and Experimental Medicine Centre @ SingHealth Duke-NUS (VIREMiCS), Singapore, Singapore
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35
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de Oliveira Figueiredo P, Stoffella-Dutra AG, Barbosa Costa G, Silva de Oliveira J, Dourado Amaral C, Duarte Santos J, Soares Rocha KL, Araújo Júnior JP, Lacerda Nogueira M, Zazá Borges MA, Pereira Paglia A, Desiree LaBeaud A, Santos Abrahão J, Geessien Kroon E, Bretas de Oliveira D, Paiva Drumond B, de Souza Trindade G. Re-Emergence of Yellow Fever in Brazil during 2016-2019: Challenges, Lessons Learned, and Perspectives. Viruses 2020; 12:E1233. [PMID: 33143114 PMCID: PMC7692154 DOI: 10.3390/v12111233] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/20/2020] [Accepted: 10/23/2020] [Indexed: 12/15/2022] Open
Abstract
Yellow fever (YF) is a re-emerging viral zoonosis caused by the Yellow Fever virus (YFV), affecting humans and non-human primates (NHP). YF is endemic in South America and Africa, being considered a burden for public health worldwide despite the availability of an effective vaccine. Acute infectious disease can progress to severe hemorrhagic conditions and has high rates of morbidity and mortality in endemic countries. In 2016, Brazil started experiencing one of the most significant YF epidemics in its history, with lots of deaths being reported in regions that were previously considered free of the disease. Here, we reviewed the historical aspects of YF in Brazil, the epidemiology of the disease, the challenges that remain in Brazil's public health context, the main lessons learned from the recent outbreaks, and our perspective for facing future YF epidemics.
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Affiliation(s)
- Poliana de Oliveira Figueiredo
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil; (P.d.O.F.); (J.S.d.O.); (C.D.A.); (J.S.A.); (E.G.K.); (B.P.D.)
| | - Ana Gabriella Stoffella-Dutra
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil; (P.d.O.F.); (J.S.d.O.); (C.D.A.); (J.S.A.); (E.G.K.); (B.P.D.)
| | - Galileu Barbosa Costa
- Laboratório de Patologia e Biologia Molecular, Instituto Gonçalo Moniz, Oswaldo Cruz Foundation, Rua Waldemar Falcão, 121, Candeal, Salvador Bahia 40296-710, Brazil
| | - Jaqueline Silva de Oliveira
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil; (P.d.O.F.); (J.S.d.O.); (C.D.A.); (J.S.A.); (E.G.K.); (B.P.D.)
| | - Carolina Dourado Amaral
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil; (P.d.O.F.); (J.S.d.O.); (C.D.A.); (J.S.A.); (E.G.K.); (B.P.D.)
| | - Juliane Duarte Santos
- Centro Integrado de Pesquisa em Saúde, Faculdade de Medicina, Universidade Federal dos Vales do Jequitinhonha e Mucuri Campus JK, Diamantina, Minas Gerais, Rodovia MGT 367, Km 583, nº 5.000 Alto da Jacuba 39100-000, Brazil; (J.D.S.); (K.L.S.R.); (D.B.d.O.)
| | - Kamila Lorene Soares Rocha
- Centro Integrado de Pesquisa em Saúde, Faculdade de Medicina, Universidade Federal dos Vales do Jequitinhonha e Mucuri Campus JK, Diamantina, Minas Gerais, Rodovia MGT 367, Km 583, nº 5.000 Alto da Jacuba 39100-000, Brazil; (J.D.S.); (K.L.S.R.); (D.B.d.O.)
| | - João Pessoa Araújo Júnior
- Departamento de Microbiologia e Imunologia, Institute of Biotechnology, Universidade Estadual Paulista Júlio de Mesquita Filho, Rio Claro, São Paulo Avenida 24A, 1515, Bela Vista 13506-900, Brazil;
| | - Maurício Lacerda Nogueira
- Laboratório de Pesquisas em Virologia, Departamento de Doenças Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, São Paulo 15090-000, Brazil;
| | - Magno Augusto Zazá Borges
- Centro de Ciências Biológicas e da Saúde, Universidade Estadual de Montes Claros, Montes Claros, Minas Gerais, Avenida Prof. Rui Braga, s/n, Vila Mauriceia 39408-354, Brazil;
| | - Adriano Pereira Paglia
- Laboratório de Ecologia e Conservação, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil;
| | - Angelle Desiree LaBeaud
- Department of Pediatrics, Division of Infectious Diseases, Stanford University School of Medicine, 300 Pasteur Dr Rm G312 MC 5208, Stanford, CA 94305, USA;
| | - Jônatas Santos Abrahão
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil; (P.d.O.F.); (J.S.d.O.); (C.D.A.); (J.S.A.); (E.G.K.); (B.P.D.)
| | - Erna Geessien Kroon
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil; (P.d.O.F.); (J.S.d.O.); (C.D.A.); (J.S.A.); (E.G.K.); (B.P.D.)
| | - Danilo Bretas de Oliveira
- Centro Integrado de Pesquisa em Saúde, Faculdade de Medicina, Universidade Federal dos Vales do Jequitinhonha e Mucuri Campus JK, Diamantina, Minas Gerais, Rodovia MGT 367, Km 583, nº 5.000 Alto da Jacuba 39100-000, Brazil; (J.D.S.); (K.L.S.R.); (D.B.d.O.)
| | - Betânia Paiva Drumond
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil; (P.d.O.F.); (J.S.d.O.); (C.D.A.); (J.S.A.); (E.G.K.); (B.P.D.)
| | - Giliane de Souza Trindade
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil; (P.d.O.F.); (J.S.d.O.); (C.D.A.); (J.S.A.); (E.G.K.); (B.P.D.)
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Neighbor danger: Yellow fever virus epizootics in urban and urban-rural transition areas of Minas Gerais state, during 2017-2018 yellow fever outbreaks in Brazil. PLoS Negl Trop Dis 2020; 14:e0008658. [PMID: 33017419 PMCID: PMC7535057 DOI: 10.1371/journal.pntd.0008658] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 07/28/2020] [Indexed: 11/19/2022] Open
Abstract
Background From the end of 2016 until the beginning of 2019, Brazil faced a massive sylvatic yellow fever (YF) outbreak. The 2016–2019 YF epidemics affected densely populated areas, especially the Southeast region, causing thousands of deaths of humans and non-human primates (NHP). Methodology/Principal findings We conducted a molecular investigation of yellow fever virus (YFV) RNA in 781 NHP carcasses collected in the urban, urban-rural interface, and rural areas of Minas Gerais state, from January 2017 to December 2018. Samples were analyzed according to the period of sampling, NHP genera, sampling areas, and sampling areas/NHP genera to compare the proportions of YFV-positive carcasses and the estimated YFV genomic loads. YFV infection was confirmed in 38.1% of NHP carcasses (including specimens of the genera Alouatta, Callicebus, Callithrix, and Sapajus), from the urban, urban-rural interface, and rural areas. YFV RNA detection was positively associated with epidemic periods (especially from December to March) and the rural environment. Higher median viral genomic loads (one million times) were estimated in carcasses collected in rural areas compared to urban ones. Conclusions/Significance The results showed the wide occurrence of YF in Minas Gerais in epidemic and non-epidemic periods. According to the sylvatic pattern of YF, a gradient of viral dissemination from rural towards urban areas was observed. A high YF positivity was observed for NHP carcasses collected in urban areas with a widespread occurrence in 67 municipalities of Minas Gerais, including large urban centers. Although there was no documented case of urban/Aedes YFV transmission to humans in Brazil during the 2016–2019 outbreaks, YFV-infected NHP in urban areas with high infestation by Aedes aegypti poses risks for YFV urban/Aedes transmission and urbanization. Brazil faced the most massive sylvatic yellow fever (YF) outbreak in 2016–2019. The outbreak affected highly densely populated areas, and Minas Gerais was the most affected state with thousands of deaths of human and non-human primates (NHP). We investigated the yellow fever virus (YFV) RNA in NHP carcasses collected throughout Minas Gerais in 2017 and 2018. We demonstrated the wide occurrence of YFV-infected NHP, including the viral persistence during the non-epidemic dry season of 2017. YFV RNA was detected in NHP carcasses in the urban, urban-rural interface and rural areas. We have also detected new YF cases in 49 municipalities where YF cases have not been previously detected during the outbreaks. Estimates of YFV genomic load in naturally infected NHP carcasses showed high and similar loads in specimens (Alouatta, Callithrix, and Callicebus) collected in rural areas and lower genomic loads in the urban-rural interface and urban Callithrix specimens. The presence of YFV inside urban areas poses an imminent risk, although no human case was epidemiologically linked to urban/Aedes transmission during the last outbreaks in Brazil.
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de Thoisy B, Silva NIO, Sacchetto L, de Souza Trindade G, Drumond BP. Spatial epidemiology of yellow fever: Identification of determinants of the 2016-2018 epidemics and at-risk areas in Brazil. PLoS Negl Trop Dis 2020; 14:e0008691. [PMID: 33001982 PMCID: PMC7553304 DOI: 10.1371/journal.pntd.0008691] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 10/13/2020] [Accepted: 08/10/2020] [Indexed: 11/19/2022] Open
Abstract
Optimise control strategies of infectious diseases, identify factors that favour the circulation of pathogens, and propose risk maps are crucial challenges for global health. Ecological niche modelling, once relying on an adequate framework and environmental descriptors can be a helpful tool for such purposes. Despite the existence of a vaccine, yellow fever (YF) is still a public health issue. Brazil faced massive sylvatic YF outbreaks from the end of 2016 up to mid-2018, but cases in human and non-human primates have been recorded until the beginning of 2020. Here we used both human and monkey confirmed YF cases from two epidemic periods (2016/2017 and 2017/2018) to describe the spatial distribution of the cases and explore how biotic and abiotic factors drive their occurrence. The distribution of YF cases largely overlaps for humans and monkeys, and a contraction of the spatial extent associated with a southward displacement is observed during the second period of the epidemics. More contributive variables to the spatiotemporal heterogeneity of cases were related to biotic factors (mammal richness), abiotic factors (temperature and precipitation), and some human-related variables (population density, human footprint, and human vaccination coverage). Both projections of the most favourable conditions showed similar trends with a contraction of the more at-risk areas. Once extrapolated at a large scale, the Amazon basin remains at lower risk, although surrounding forest regions and notably the North-West region, would face a higher risk. Spatial projections of infectious diseases often relied on climatic variables only; here for both models, we instead highlighted the importance of considering local biotic conditions, hosts vulnerability, social and epidemiological factors to run the spatial risk analysis correctly: all YF cases occurring later on, in 2019 and 2020, were observed in the predicted at-risk areas.
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Affiliation(s)
- Benoit de Thoisy
- Laboratoire des Interactions Virus-Hôtes, Institut Pasteur de la Guyane, Cayenne, French Guiana
| | | | - Lívia Sacchetto
- Department of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Giliane de Souza Trindade
- Department of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Betânia Paiva Drumond
- Department of Microbiology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Immune Response Persistence and Safety of a Booster Dose of the Tetravalent Dengue Vaccine in Adolescents and Adults Who Previously Completed the 3-dose Schedule 4-5 Years Earlier in Latin America: A Randomized Placebo-controlled Trial. Pediatr Infect Dis J 2020; 39:961-968. [PMID: 32932330 DOI: 10.1097/inf.0000000000002830] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND We previously described an increased immune response 28 days after a booster dose of the live, attenuated, tetravalent dengue vaccine (CYD-TDV) in healthy adolescents and adults in Latin America (CYD64, NCT02623725). This follow-up study evaluated immune response persistence and safety of a CYD-TDV booster dose up to Month (M) 24 post-booster. METHODS This study included 250 participants who previously received 3 primary doses of CYD-TDV in the CYD13 (NCT00993447) and CYD30 (NCT01187433) studies, and who were randomized 4-5 years later to receive a CYD-TDV booster or placebo (3:1). Dengue neutralizing antibodies against the parental dengue virus strains were assessed using the plaque reduction neutralization test (PRNT50) at M6, M12, and M24 post-booster. Post-booster memory B-cell responses were assessed in a subset of participants using the FluoroSpot assay up to M12 post-booster. RESULTS In the CYD-TDV group (n = 187), dengue neutralizing antibody geometric mean titers (GMTs) declined from the peak at day 28 through to M24 for all serotypes. GMTs at M24 were similar to those at pre-booster among baseline dengue seropositives. A similar trend was observed for baseline dengue seronegatives, albeit at a lower magnitude. Previous vaccination-induced detectable B-cell memory responses in seropositives and seronegatives that decreased to pre-booster levels at M12 post-booster. The CYD-TDV booster dose was well-tolerated. CONCLUSIONS In baseline dengue seropositives, following a CYD-TDV booster dose administered 4-5 years after primary immunization, dengue neutralizing antibody GMTs and B-cell memory responses peaked in the short-term before gradually decreasing over time. A CYD-TDV booster dose could improve protection against dengue during outbreak periods.
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Ferreira MS. Yellow Fever. Ann Hepatol 2020; 18:788-789. [PMID: 31735348 DOI: 10.1016/j.aohep.2019.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Marcelo Simão Ferreira
- Full Professor of Infectious Diseases and Hepatology, Federal University of Uberlândia, Minas Gerais, Brazil.
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Possible non-sylvatic transmission of yellow fever between non-human primates in São Paulo city, Brazil, 2017-2018. Sci Rep 2020; 10:15751. [PMID: 32978448 PMCID: PMC7519641 DOI: 10.1038/s41598-020-72794-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 09/04/2020] [Indexed: 12/13/2022] Open
Abstract
Yellow Fever (YF) is a severe disease caused by Yellow Fever Virus (YFV), endemic in some parts of Africa and America. In Brazil, YFV is maintained by a sylvatic transmission cycle involving non-human primates (NHP) and forest canopy-dwelling mosquitoes, mainly Haemagogus-spp and Sabethes-spp. Beginning in 2016, Brazil faced one of the largest Yellow Fever (YF) outbreaks in recent decades, mainly in the southeastern region. In São Paulo city, YFV was detected in October 2017 in Aloutta monkeys in an Atlantic Forest area. From 542 NHP, a total of 162 NHP were YFV positive by RT-qPCR and/or immunohistochemistry, being 22 Callithrix-spp. most from urban areas. Entomological collections executed did not detect the presence of strictly sylvatic mosquitoes. Three mosquito pools were positive for YFV, 2 Haemagogus leucocelaenus, and 1 Aedes scapularis. In summary, YFV in the São Paulo urban area was detected mainly in resident marmosets, and synanthropic mosquitoes were likely involved in viral transmission.
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Bifani AM, Ong EZ, de Alwis R. Vaccination and Therapeutics: Responding to the Changing Epidemiology of Yellow Fever. CURRENT TREATMENT OPTIONS IN INFECTIOUS DISEASES 2020; 12:349-360. [PMID: 32837338 PMCID: PMC7351566 DOI: 10.1007/s40506-020-00232-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
PURPOSE OF REVIEW At the turn of the nineteenth century, yellow fever (YF) was considered the most dangerous infectious disease with high case fatality. Subsequent, mass vaccination campaigns coupled with widespread elimination of the YF mosquito vector significantly decreased YF cases and reduced outbreaks to the tropical and subtropical forested regions of Africa and South America. RECENT FINDINGS However, recent (2016) large outbreaks in Angola, Democratic Republic of Congo (DRC), and South-Eastern Brazil, where previously had been demarcated as low-risk regions, have highlighted the possibility of a rapidly changing epidemiology and the potential re-emergence of yellow fever virus (YFV). Furthermore, the first-ever importation of YFV into Asia has highlighted the potential fear of YFV emerging as a global threat. SUMMARY In this review, we describe the changing epidemiology of YF outbreaks and highlight the use of public health policies, therapeutics, and vaccination as tools to help eliminate future YFV outbreaks.
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Affiliation(s)
- Amanda Makha Bifani
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore
| | - Eugenia Z. Ong
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore
- Viral Research and Experimental Medicine Centre (VIREMiCS), SingHealth Duke-NUS, Singapore, Singapore
| | - Ruklanthi de Alwis
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore
- Viral Research and Experimental Medicine Centre (VIREMiCS), SingHealth Duke-NUS, Singapore, Singapore
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Staples JE, Barrett ADT, Wilder-Smith A, Hombach J. Review of data and knowledge gaps regarding yellow fever vaccine-induced immunity and duration of protection. NPJ Vaccines 2020; 5:54. [PMID: 32655896 PMCID: PMC7338446 DOI: 10.1038/s41541-020-0205-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 05/29/2020] [Indexed: 12/13/2022] Open
Abstract
Yellow fever (YF) virus is a mosquito-borne flavivirus found in Sub-Saharan Africa and tropical South America. The virus causes YF, a viral hemorrhagic fever, which can be prevented by a live-attenuated vaccine, strain 17D. Despite the vaccine being very successful at decreasing disease risk, YF is considered a re-emerging disease due to the increased numbers of cases in the last 30 years. Until 2014, the vaccine was recommended to be administered with boosters every 10 years, but in 2014 the World Health Organization recommended removal of booster doses for all except special populations. This recommendation has been questioned and there have been reports of waning antibody titers in adults over time and more recently in pediatric populations. Clearly, the potential of waning antibody titers is a very important issue that needs to be carefully evaluated. In this Perspective, we review what is known about the correlate of protection for full-dose YF vaccine, current information on waning antibody titers, and gaps in knowledge. Overall, fundamental questions exist on the durability of protective immunity induced by YF vaccine, but interpretation of studies is complicated by the use of different assays and different cut-offs to measure seroprotective immunity, and differing results among certain endemic versus non-endemic populations. Notwithstanding the above, there are few well-characterized reports of vaccine failures, which one would expect to observe potentially more with the re-emergence of a severe disease. Overall, there is a need to improve YF disease surveillance, increase primary vaccination coverage rates in at-risk populations, and expand our understanding of the mechanism of protection of YF vaccine.
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Affiliation(s)
- J. Erin Staples
- Arboviral Diseases Branch, U.S. Centers for Disease Control and Prevention, Fort Collins, CO USA
| | - Alan D. T. Barrett
- Department of Pathology and Sealy Institute for Vaccine Sciences, University of Texas Medical Branch, Galveston, TX USA
| | - Annelies Wilder-Smith
- Institute of Public Health, University of Heidelberg, Heidelberg, Germany
- London School of Hygiene and Tropical Medicine, London, UK
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Pierson TC, Diamond MS. The continued threat of emerging flaviviruses. Nat Microbiol 2020; 5:796-812. [PMID: 32367055 DOI: 10.1038/s41564-020-0714-0] [Citation(s) in RCA: 499] [Impact Index Per Article: 124.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 03/27/2020] [Indexed: 12/18/2022]
Abstract
Flaviviruses are vector-borne RNA viruses that can emerge unexpectedly in human populations and cause a spectrum of potentially severe diseases including hepatitis, vascular shock syndrome, encephalitis, acute flaccid paralysis, congenital abnormalities and fetal death. This epidemiological pattern has occurred numerous times during the last 70 years, including epidemics of dengue virus and West Nile virus, and the most recent explosive epidemic of Zika virus in the Americas. Flaviviruses are now globally distributed and infect up to 400 million people annually. Of significant concern, outbreaks of other less well-characterized flaviviruses have been reported in humans and animals in different regions of the world. The potential for these viruses to sustain epidemic transmission among humans is poorly understood. In this Review, we discuss the basic biology of flaviviruses, their infectious cycles, the diseases they cause and underlying host immune responses to infection. We describe flaviviruses that represent an established ongoing threat to global health and those that have recently emerged in new populations to cause significant disease. We also provide examples of lesser-known flaviviruses that circulate in restricted areas of the world but have the potential to emerge more broadly in human populations. Finally, we discuss how an understanding of the epidemiology, biology, structure and immunity of flaviviruses can inform the rapid development of countermeasures to treat or prevent human infections as they emerge.
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Affiliation(s)
- Theodore C Pierson
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, the National Institutes of Health, Bethesda, MD, USA.
| | - Michael S Diamond
- Departments of Medicine, Molecular Microbiology, Pathology & Immunology, Andrew M. and Jane M. Bursky Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA.
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Silva NIO, Sacchetto L, de Rezende IM, Trindade GDS, LaBeaud AD, de Thoisy B, Drumond BP. Recent sylvatic yellow fever virus transmission in Brazil: the news from an old disease. Virol J 2020; 17:9. [PMID: 31973727 PMCID: PMC6979359 DOI: 10.1186/s12985-019-1277-7] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 12/27/2019] [Indexed: 12/11/2022] Open
Abstract
Yellow fever (YF) is an acute viral disease, affecting humans and non-human primates (NHP), caused by the yellow fever virus (YFV). Despite the existence of a safe vaccine, YF continues to cause morbidity and mortality in thousands of people in Africa and South America. Since 2016, massive YF outbreaks have taken place in Brazil, reaching YF-free zones, causing thousands of deaths of humans and NHP. Here we reviewed the main epidemiological aspects, new clinical findings in humans, and issues regarding YFV infection in vectors and NHP in Brazil. The 2016-2019 YF epidemics have been considered the most significant outbreaks of the last 70 years in the country, and the number of human cases was 2.8 times higher than total cases in the previous 36 years. A new YFV lineage was associated with the recent outbreaks, with persistent circulation in Southeast Brazil until 2019. Due to the high number of infected patients, it was possible to evaluate severity and death predictors and new clinical features of YF. Haemagogus janthinomys and Haemagogus leucocelaenus were considered the primary vectors during the outbreaks, and no human case suggested the occurrence of the urban transmission cycle. YFV was detected in a variety of NHP specimens presenting viscerotropic disease, similar to that described experimentally. Further studies regarding NHP sensitivity to YFV, YF pathogenesis, and the duration of the immune response in NHP could contribute to YF surveillance, control, and future strategies for NHP conservation.
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Affiliation(s)
- Natalia Ingrid Oliveira Silva
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Lívia Sacchetto
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Izabela Maurício de Rezende
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Giliane de Souza Trindade
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Angelle Desiree LaBeaud
- Division of Infectious Disease, Department of Pediatrics, Stanford University School of Medicine, Stanford, California, USA
| | - Benoit de Thoisy
- Laboratoire des Interactions Virus-Hôtes, Institut Pasteur de la Guyane, Cayenne, French Guiana
| | - Betânia Paiva Drumond
- Laboratório de Vírus, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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ELLWANGER JOELHENRIQUE, KULMANN-LEAL BRUNA, KAMINSKI VALÉRIAL, VALVERDE-VILLEGAS JACQUELINEMARÍA, VEIGA ANABEATRIZGDA, SPILKI FERNANDOR, FEARNSIDE PHILIPM, CAESAR LÍLIAN, GIATTI LEANDROLUIZ, WALLAU GABRIELL, ALMEIDA SABRINAE, BORBA MAUROR, HORA VANUSAPDA, CHIES JOSÉARTURB. Beyond diversity loss and climate change: Impacts of Amazon deforestation on infectious diseases and public health. ACTA ACUST UNITED AC 2020; 92:e20191375. [DOI: 10.1590/0001-3765202020191375] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 02/17/2020] [Indexed: 12/15/2022]
Affiliation(s)
| | | | | | | | | | | | | | - LÍLIAN CAESAR
- Universidade Federal do Rio Grande do Sul/UFRGS, Brazil
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Origin of the São Paulo Yellow Fever epidemic of 2017-2018 revealed through molecular epidemiological analysis of fatal cases. Sci Rep 2019; 9:20418. [PMID: 31892699 PMCID: PMC6938505 DOI: 10.1038/s41598-019-56650-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 12/11/2019] [Indexed: 01/03/2023] Open
Abstract
The largest outbreak of yellow fever of the 21st century in the Americas began in 2016, with intense circulation in the southeastern states of Brazil, particularly in sylvatic environments near densely populated areas including the metropolitan region of São Paulo city (MRSP) during 2017–2018. Herein, we describe the origin and molecular epidemiology of yellow fever virus (YFV) during this outbreak inferred from 36 full genome sequences taken from individuals who died following infection with zoonotic YFV. Our analysis revealed that these deaths were due to three genetic variants of sylvatic YFV that belong the South American I genotype and that were related to viruses previously isolated in 2017 from other locations in Brazil (Minas Gerais, Espírito Santo, Bahia and Rio de Janeiro states). Each variant represented an independent virus introduction into the MRSP. Phylogeographic and geopositioning analyses suggested that the virus moved around the peri-urban area without detectable human-to-human transmission, and towards the Atlantic rain forest causing human spill-over in nearby cities, yet in the absence of sustained viral transmission in the urban environment.
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Silent Circulation of the Saint Louis Encephalitis Virus among Humans and Equids, Southeast Brazil. Viruses 2019; 11:v11111029. [PMID: 31694207 PMCID: PMC6893452 DOI: 10.3390/v11111029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 10/29/2019] [Accepted: 11/02/2019] [Indexed: 11/17/2022] Open
Abstract
Saint Louis encephalitis virus (SLEV) is a mosquito-borne flavivirus that occurs throughout the Americas, and is considered a public health threat. In Brazil, SLEV has been detected from human cases associated with dengue-like disease, but no neurological symptoms were reported. Furthermore, the epidemiology of SLEV in human populations is still poorly explored in the country. We reported serological and molecular detection of SLEV in a healthy population of equids and humans from rural areas in Southeast Brazil. A plaque reduction neutralization test was applied, and neutralizing antibodies were detected in 11 individuals (4.6%) and 60 horses (21.5%). A qPCR targeting the 5′UTR region and reverse transcription-PCR (RT-PCR) targeting the non-structural protein (NS5) gene were performed and three individuals tested positive in both assays. Subsequent phylogenetic analysis confirmed SLEV circulation and its findings suggest the occurrence of an asymptomatic or subclinical presence in human and animal cases, correlating with the risks for outbreaks and consequently burden of SLEV infections to public health. Preventive strategies should include improved surveillance in regions with a high probability of SLEV occurrence, improvement in diagnostic methods, and evaluation of exposure/risk factors that can favor SLEV emergence.
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Escosteguy CC, Pereira AGL, Marques MRVE, Lima TRDA, Galliez RM, Medronho RDA. Yellow fever: profile of cases and factors associated with death in a hospital in the State of Rio de Janeiro, 2017-2018. Rev Saude Publica 2019; 53:89. [PMID: 31644770 PMCID: PMC6802947 DOI: 10.11606/s1518-8787.2019053001434] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 03/22/2019] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE Describe the clinical and epidemiological profile of confirmed cases of yellow fever whose patients were hospitalized in a general hospital for infectious diseases in the State of Rio de Janeiro, Brazil, from March 11, 2017 to June 15, 2018, during a recent outbreak and factors associated with death. METHODS This is a retrospective observational study with analysis of secondary databases of local epidemiological surveillance system, and complementary data collection from epidemiological investigation records and clinical records. Study variables included demographic, epidemiological, clinical, and laboratory data. A descriptive statistical analysis and a bivariate and multivariate analysis by logistic regression were performed to analyze factors associated with death. RESULTS Fifty-two patients diagnosed with yellow fever were hospitalized, 86.5% male patients, median age 49.5 years, 40.4% rural workers. The most frequent signs and symptoms were fever (90.4%), jaundice (86.5%), nausea and/or vomiting (69.2%), changes in renal excretion (53.8%), bleeding (50%), and abdominal pain (48.1%), with comorbidity in 38.5% of all cases. The lethality rate was 40.4%. Factors significantly associated with a higher chance of death in the bivariate analysis were: bleeding, changes in renal excretion, and maximum values of direct bilirubin, aspartate aminotransferase (AST), alanine aminotransferase (ALT), urea, and creatinine. In the multivariate analysis by logistic regression, only changes in renal excretion and ALT remained significant predictors of higher chance of death. A threshold effect was also observed for AST. The cutoff points identified as high risk for death were ALT > 4,000 U/L and AST > 6,000 U/L. CONCLUSIONS This study contributed to the knowledge on the profile of confirmed cases of high severity yellow fever. The main factors associated with death were changes in renal excretion and elevated serum transaminases, especially ALT. High lethality emphasizes the need for early diagnosis and treatment, and the importance of increasing vaccination coverage.
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Affiliation(s)
| | - Alessandra Gonçalves Lisbôa Pereira
- Hospital Federal dos Servidores do Estado. Serviço de Epidemiologia. Rio de Janeiro, RJ, Brasil.,Universidade Estácio de Sá. Faculdade de Medicina. Rio de Janeiro, RJ, Brasil
| | | | - Tatiana Rodrigues de Araujo Lima
- Hospital Federal dos Servidores do Estado. Serviço de Epidemiologia. Rio de Janeiro, RJ, Brasil.,Universidade do Estado do Rio de Janeiro. Faculdade de Enfermagem. Rio de Janeiro, RJ, Brasil
| | - Rafael Mello Galliez
- Instituto Estadual de Infectologia São Sebastião. Rio de Janeiro, RJ, Brasil.,Universidade Federal do Rio de Janeiro. Faculdade de Medicina. Rio de Janeiro, RJ, Brasil
| | - Roberto de Andrade Medronho
- Universidade Federal do Rio de Janeiro. Faculdade de Medicina. Rio de Janeiro, RJ, Brasil.,Universidade Federal do Rio de Janeiro. Instituto de Estudos em Saúde Coletiva. Rio de Janeiro, RJ, Brasil
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Dos Santos Franco L, Gushi LT, Luiz WB, Amorim JH. Seeking Flavivirus Cross-Protective Immunity. Front Immunol 2019; 10:2260. [PMID: 31616432 PMCID: PMC6763598 DOI: 10.3389/fimmu.2019.02260] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 09/06/2019] [Indexed: 01/04/2023] Open
Abstract
The Flavivirus genus is composed by viral serocomplexes with relevant global epidemiological impact. Many areas of the world present both, vector fauna and geographical conditions compatible with co-circulation, importing, emergence, and epidemics of flaviviruses of different serocomplexes. In this study, we aimed to identify both, immunological determinants and patterns of immune response possibly involved in flavivirus serocomplex cross-protection. We searched B and T cells epitopes which were thoroughly shown to be involved in flavivirus immunological control. Such epitopes were analyzed regarding their conservation, population coverage, and location along flavivirus polyprotein. We found that epitopes capable of eliciting flavivirus cross-protective immunity to a wide range of human populations are concentrated in proteins E, NS3, and NS5. Such identification of both, immunological determinants and patterns of immune response involved in flavivirus cross-protective immunity should be considered in future vaccine development. Moreover, cross-reactive epitopes presented in this work may be involved in dynamics of diseases caused by flaviviruses worldwide.
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Affiliation(s)
- Lorrany Dos Santos Franco
- Laboratório de Agentes Infecciosos e Vetores, Programa de Pós-graduação em Patologia Investigativa, Centro das Ciências Biológicas e da Saúde, Universidade Federal do Oeste da Bahia, Bahia, Brazil
| | - Letícia Tsieme Gushi
- Laboratório de Agentes Infecciosos e Vetores, Programa de Pós-graduação em Patologia Investigativa, Centro das Ciências Biológicas e da Saúde, Universidade Federal do Oeste da Bahia, Bahia, Brazil
| | - Wilson Barros Luiz
- Programa de Pós-graduação em Biologia e Biotecnologia de Microrganismos, Universidade Estadual de Santa Cruz, Bahia, Brazil
| | - Jaime Henrique Amorim
- Laboratório de Agentes Infecciosos e Vetores, Programa de Pós-graduação em Patologia Investigativa, Centro das Ciências Biológicas e da Saúde, Universidade Federal do Oeste da Bahia, Bahia, Brazil.,Programa de Pós-graduação em Biologia e Biotecnologia de Microrganismos, Universidade Estadual de Santa Cruz, Bahia, Brazil
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Lopes RL, Pinto JR, Silva Junior GBD, Santos AKT, Souza MTO, Daher EDF. Kidney involvement in yellow fever: a review. Rev Inst Med Trop Sao Paulo 2019; 61:e35. [PMID: 31340247 PMCID: PMC6648004 DOI: 10.1590/s1678-9946201961035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 06/24/2019] [Indexed: 12/14/2022] Open
Abstract
Yellow fever is one of the most important mosquito-borne diseases, which still affects a significant number of people every year, mainly in tropical countries. Mortality can be high, even with intensive treatment due to multiple organ failure, including acute kidney injury (AKI). This disease can also be a burden on the health care system in developing countries, without mentioning the number of lives that could be spared with an early diagnosis and adequate monitoring and treatment. The pathophysiology of yellow fever-induced acute kidney injury (AKI) is still to be completely understood, and the best clinical approach has not yet been determined. This manuscript presents the most recent scientific evidence of kidney involvement in yellow fever, since AKI plays an important role in the mortality rate. Recent outbreaks have occurred in Brazil and further studies are required to provide a better clinical control for patients with yellow fever.
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Affiliation(s)
- Renata Lima Lopes
- Canadian College of Microbiologists. Vancouver, British Columbia, Canada
| | | | - Geraldo Bezerra da Silva Junior
- Universidade de Fortaleza, Curso de Medicina, Programas de Pós-Graduação em Saúde Coletiva e Ciências Médicas, Fortaleza, Ceará, Brazil
| | | | | | - Elizabeth De Francesco Daher
- Universidade Federal do Ceará, Faculdade de Medicina, Departamento de Medicina Clínica, Programa de Pós-Graduação em Ciências Médicas, Fortaleza, Ceará, Brazil
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