The Influence of Landscape Structure on the Dispersal Pattern of Yellow Fever Virus in the State of São Paulo

2021 ◽  
Author(s):  
Ramon Wilk-da-Silva ◽  
Antônio Ralph Medeiros-Sousa ◽  
Gabriel Zorello Laporta ◽  
Luis Filipe Mucci ◽  
Paula Ribeiro Prist ◽  
...  
Keyword(s):  
Yellow Fever ◽  
Landscape Structure ◽  
Yellow Fever Virus ◽  
Sao Paulo ◽  
The State ◽  
Fever Virus ◽  
São Paulo ◽  
Dispersal Pattern

scholarly journals Genomic Surveillance of Yellow Fever Virus Epizootic in São Paulo, Brazil, 2016 – 2018

2019 ◽  
Author(s):  
S. C. Hill ◽  
R. P. de Souza ◽  
J. Thézé ◽  
I. Claro ◽  
R. S. Aguiar ◽  
...  
Keyword(s):  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Sao Paulo ◽  
The State ◽  
Fever Virus ◽  
São Paulo ◽  
Paulo State ◽  
Southeast Brazil ◽  
São Paulo State ◽  
Substantial Heterogeneity

AbstractSão Paulo (SP), a densely inhabited state in southeast Brazil that contains the fourth most populated city in the world, recently experienced its largest yellow fever virus (YFV) outbreak in decades. YFV does not normally circulate extensively in SP, so most people were unvaccinated when the outbreak began. Surveillance in non-human primates (NHPs) is important for determining the magnitude and geographic extent of an epizootic, thereby helping to evaluate the risk of YFV spillover to humans. Data from infected NHPs can give more accurate insights into YFV spread than when using data from human cases alone. To contextualise human cases, identify epizootic foci and uncover the rate and direction of YFV spread in SP, we generated and analysed virus genomic data and epizootic case data from NHP in SP. We report the occurrence of three spatiotemporally distinct phases of the outbreak in SP prior to February 2018. We generated 51 new virus genomes from YFV positive cases identified in 23 different municipalities in SP, mostly sampled from non-human primates between October 2016 and January 2018. Although we observe substantial heterogeneity in lineage dispersal velocities between phylogenetic branches, continuous phylogeographic analyses of generated YFV genomes suggest that YFV lineages spread in São Paulo state at a mean rate of approximately 1km per day during all phases of the outbreak. Viral lineages from the first epizootic phase in northern São Paulo subsequently dispersed towards the south of the state to cause the second and third epizootic phases there. This alters our understanding of how YFV was introduced into the densely populated south of SP state. Our results shed light on the sylvatic transmission of yellow fever in highly fragmented forested regions in SP state and highlight the importance of continued surveillance of zoonotic pathogens in sentinel species.Author’s SummarySince July 2016, the southeast region of Brazil has experienced the largest yellow fever virus (YFV) outbreak in decades. São Paulo is the most densely populated state in southeast Brazil. The outbreak has caused serious public health concern in the state, as YFV does not normally circulate widely there and most of the 21 million inhabitants were correspondingly unvaccinated against YFV when the outbreak began. In Brazil, YFV typically circulates among non-human primates, and human cases represent isolated spillover events from this predominantly sylvatic cycle. Understanding the epidemiological dynamics and spread of YFV in non-human primates is therefore critical for contextualising human cases, and guiding vaccination strategies that can better protect local human populations. Here, we aim to contextualise human cases, identify epizootic foci and uncover the rate and direction of YFV spread in SP. We analyse the geographic and temporal distribution of observed cases of YFV in non-human primates in São Paulo state, and identify three distinct phases of the epizootic. We generate sequence data from 51 YFV-positive cases and perform phylogenetic and phylogeographic analyses aimed at understanding the spatial spread of YFV in São Paulo state. Analyses of these data indicate that YFV spread from the north of São Paulo state into more densely populated southern regions. Although we observe substantial heterogeneity in the rate at which different sampled YFV lineages spread, the typical rate of spread was low with a mean rate of ~1 km per day. This is consistent with a scenario in which the majority of transmission events occurred between non-human primates and sylvatic vectors across forested patches.Article Summary LineGenomic surveillance of yellow fever in São Paulo during the 2016-2018 epizootic

scholarly journals Isolation of yellow fever virus (YFV) from naturally infectied Haemagogus (Conopostegus) leucocelaenus (diptera, cukicudae) in São Paulo State, Brazil, 2009

2011 ◽  
Vol 53 (3) ◽  
pp. 133-139 ◽  
Author(s):  
Renato Pereira de Souza ◽  
Selma Petrella ◽  
Terezinha Lisieux Moraes Coimbra ◽  
Adriana Yurika Maeda ◽  
Iray Maria Rocco ◽  
...  
Keyword(s):  
Yellow Fever ◽  
Cultured Cells ◽  
Yellow Fever Virus ◽  
Sao Paulo ◽  
Fever Virus ◽  
São Paulo ◽  
Paulo State ◽  
Virus Rna ◽  
São Paulo State ◽  
Entomological Research

After detecting the death of Howlers monkeys (genus Alouatta) and isolation of yellow fever virus (YFV) in Buri county, São Paulo, Brazil, an entomological research study in the field was started. A YFV strain was isolated from newborn Swiss mice and cultured cells of Aedes albopictus - C6/36, from a pool of six Haemagogus (Conopostegus) leucocelaenus (Hg. leucocelaenus) mosquitoes (Dyar & Shannon) collected at the study site. Virus RNA fragment was amplified by RT-PCR and sequenced. The MCC Tree generated showed that the isolated strain is related to the South American I genotype, in a monophyletic clade containing isolates from recent 2008-2010 epidemics and epizootics in Brazil. Statistical analysis commonly used were calculated to characterize the sample in relation to diversity and dominance and indicated a pattern of dominance of one or a few species. Hg. leucocelaenus was found infected in Rio Grande do Sul State as well. In São Paulo State, this is the first detection of YFV in Hg. leucocelaenus.

scholarly journals Coding-Complete Genome Sequence of a Yellow Fever Virus Isolated from a Baby Howler Monkey (Alouatta caraya) from São Paulo State, Brazil, in 2016

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Márcio Junio Lima Siconelli ◽  
Daniel Macedo de Melo Jorge ◽  
Luiza Antunes de Castro-Jorge ◽  
Benedito Antonio Lopes da Fonseca
Keyword(s):  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Complete Sequence ◽  
Sao Paulo ◽  
Fever Virus ◽  
Howler Monkey ◽  
São Paulo ◽  
Coding Regions ◽  
Paulo State ◽  
São Paulo State

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.

scholarly journals Risk factors for acute kidney injury and death in patients infected with the yellow fever virus during the 2018 outbreak in São Paulo, Brazil

2021 ◽  
Author(s):  
Márcia Fernanda Arantes ◽  
Victor Faria Seabra ◽  
Paulo Ricardo Gessolo Lins ◽  
Camila Eleuterio Rodrigues ◽  
Bernardo Vergara Reichert ◽  
...  
Keyword(s):  
Risk Factors ◽  
Acute Kidney Injury ◽  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Kidney Injury ◽  
Sao Paulo ◽  
Fever Virus ◽  
São Paulo

scholarly journals Epizootics due to Yellow Fever Virus in São Paulo State, Brazil: viral dissemination to new areas (2016–2017)

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Mariana Sequetin Cunha ◽  
Antonio Charlys da Costa ◽  
Natália Coelho Couto de Azevedo Fernandes ◽  
Juliana Mariotti Guerra ◽  
Fabiana Cristina Pereira dos Santos ◽  
...  
Keyword(s):  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Sao Paulo ◽  
Fever Virus ◽  
São Paulo ◽  
Viral Dissemination ◽  
Paulo State ◽  
São Paulo State

scholarly journals Genomic Surveillance of Yellow Fever Virus Epizootic in São Paulo, Brazil, 2016 – 2018

2020 ◽  
Vol 16 (8) ◽  
pp. e1008699 ◽  
Author(s):  
Sarah C. Hill ◽  
Renato de Souza ◽  
Julien Thézé ◽  
Ingra Claro ◽  
Renato S. Aguiar ◽  
...  
Keyword(s):  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Sao Paulo ◽  
Fever Virus ◽  
São Paulo

scholarly journals Circulation of antibodies against yellow fever virus in a simian population in the area of Porto Primavera Hydroelectric Plant, São Paulo, Brazil

2010 ◽  
Vol 52 (1) ◽  
pp. 11-16 ◽  
Author(s):  
Maura Antonia Lima ◽  
Nicolina Silvana Romano-Lieber ◽  
Ana Maria Ribeiro de Castro Duarte
Keyword(s):  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Hydroelectric Plant ◽  
Sao Paulo ◽  
Fever Virus ◽  
Epidemiological Surveillance ◽  
Enzyme Linked Immunosorbent Assay ◽  
São Paulo ◽  
Sylvatic Cycle ◽  
Viral Infectious Disease

Yellow fever (YF) is an acute viral infectious disease transmitted by mosquitoes which occurs in two distinct epidemiological cycles: sylvatic and urban. In the sylvatic cycle, the virus is maintained by monkey's infection and transovarian transmission in vectors. Surveillance of non-human primates is required for the detection of viral circulation during epizootics, and for the identification of unaffected or transition areas. An ELISA (enzyme-linked immunosorbent assay) was standardized for estimation of the prevalence of IgG antibodies against yellow fever virus in monkey sera (Alouatta caraya) from the reservoir area of Porto Primavera Hydroelectric Plant, in the state of São Paulo, Brazil. A total of 570 monkey sera samples were tested and none was reactive to antibodies against yellow fever virus. The results corroborate the epidemiology of yellow fever in the area. Even though it is considered a transition area, there were no reports to date of epizootics or yellow fever outbreaks in humans. Also, entomological investigations did not detect the presence of vectors of this arbovirus infection. ELISA proved to be fast, sensitive, an adequate assay, and an instrument for active search in the epidemiological surveillance of yellow fever allowing the implementation of prevention actions, even before the occurrence of epizootics.

scholarly journals Reemergence of yellow fever: detection of transmission in the State of São Paulo, Brazil, 2008

2011 ◽  
Vol 44 (3) ◽  
pp. 290-296 ◽  
Author(s):  
Eduardo Stramandinoli Moreno ◽  
Iray Maria Rocco ◽  
Eduardo Sterlino Bergo ◽  
Roosecelis Araujo Brasil ◽  
Melissa Mascheratti Siciliano ◽  
...  
Keyword(s):  
Cell Culture ◽  
Yellow Fever ◽  
Virus Isolation ◽  
Yellow Fever Virus ◽  
Sao Paulo ◽  
São Paulo ◽  
Rt Pcr ◽  
Epidemiological Evaluation ◽  
Entomological Research ◽  
Virus Strains

INTRODUCTION: Following yellow fever virus (YFV) isolation in monkeys from the São José do Rio Preto region and two fatal human autochthonous cases from the Ribeirão Preto region, State of São Paulo, Brazil, two expeditions for entomological research and eco-epidemiological evaluation were conducted. METHODS: A total of 577 samples from humans, 108 from monkeys and 3,049 mosquitoes were analyzed by one or more methods: virus isolation, ELISA-IgM, RT-PCR, histopathology and immunohistochemical. RESULTS: Of the 577 human samples, 531 were tested by ELISA-IgM, with 3 positives, and 235 were inoculated into mice and 199 in cell culture, resulting in one virus isolation. One sample was positive by histopathology and immunohistochemical. Using RT-PCR, 25 samples were processed with 4 positive reactions. A total of 108 specimens of monkeys were examined, 108 were inoculated into mice and 45 in cell culture. Four virus strains were isolated from Alouattacaraya. A total of 931 mosquitoes were captured in Sao Jose do Rio Preto and 2,118 in Ribeirão Preto and separated into batches. A single isolation of YFV was derived from a batch of 9 mosquitoes Psorophoraferox, collected in Urupês, Ribeirão Preto region. A serological survey was conducted with 128 samples from the municipalities of São Carlos, Rincão and Ribeirão Preto and 10 samples from contacts of patients from Ribeirão Preto. All samples were negative by ELISA-IgM for YFV. CONCLUSIONS: The results confirm the circulation of yellow fever, even though sporadic, in the Sao Paulo State and reinforce the importance of vaccination against yellow fever in areas considered at risk.

scholarly journals A public health risk assessment for yellow fever vaccination: a model exemplified by an outbreak in the state of São Paulo, Brazil

2015 ◽  
Vol 110 (2) ◽  
pp. 230-234 ◽  
Author(s):  
Ana Freitas Ribeiro ◽  
Ciléa Tengan ◽  
Helena Keico Sato ◽  
Roberta Spinola ◽  
Melissa Mascheretti ◽  
...  
Keyword(s):  
Public Health ◽  
Risk Assessment ◽  
Health Risk ◽  
Yellow Fever ◽  
Health Risk Assessment ◽  
Sao Paulo ◽  
The State ◽  
São Paulo ◽  
Public Health Risk ◽  
Yellow Fever Vaccination
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