scholarly journals Flight Height Preference for Oviposition of Mosquito (Diptera: Culicidae) Vectors of Sylvatic Yellow Fever Virus Near the Hydroelectric Reservoir of Simplício, Minas Gerais, Brazil

2013 ◽  
Vol 50 (4) ◽  
pp. 791-795 ◽  
Author(s):  
Jeronimo Alencar ◽  
Fernanda Morone ◽  
Cecília Ferreira De Mello ◽  
Nicolas Dégallier ◽  
Paulo Sérgio Lucio ◽  
...  
Keyword(s):  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Minas Gerais ◽  
Fever Virus ◽  
Hydroelectric Reservoir ◽  
Flight Height

scholarly journals Fast surveillance response and genome sequencing reveals the circulation of a new Yellow Fever Virus sublineage in 2021, in Minas Gerais, Brazil

2021 ◽  
Author(s):  
Miguel Souza Andrade ◽  
Fabricio Souza Campos ◽  
Cirilo Henrique Oliveira ◽  
Ramon Silva Oliveira ◽  
Aline Alves Scarpellini Campos ◽  
...  
Keyword(s):  
Genome Sequencing ◽  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Minas Gerais ◽  
Amazon Region ◽  
The State ◽  
Fever Virus ◽  
Sylvatic Cycle ◽  
Viral Genomes ◽  
A Genome

Yellow fever virus (YFV) exhibits a sylvatic cycle of transmission involving wild mosquitoes and non-human primates (NHP). In Brazil, YFV is endemic in the Amazon region, from where waves of epidemic expansion towards other Brazilian states eventually occur. During such waves, the virus usually follows the route from North to the Central-West and Southeast Brazilian regions. Amidst these journeys, outbreaks of Yellow Fever (YF) in NHPs, with spillovers to humans have been observed. In the present work, we describe a surveillance effort encompassing the technology of smartphone applications and the coordinated action of several research institutions and health services that succeeded in the first confirmation of YFV in NHPs in the state of Minas Gerais (MG), Southeast region, in 2021, followed by genome sequencing in an interval of only ten days. Samples from two NHPs (one of the species Alouatta caraya in the municipality of Icarai de Minas and other of the species Callithrix penicillata in the municipality of Ubai) were collected and the presence of YFV was confirmed by RT-qPCR. We generated three near-complete and one partial-genome by Nanopore sequencer MinION. Phylogenetic analysis revealed that all viral genomes recovered are equal and related to lineage South America 1, clustering with a genome detected in the Amazon region (Para state) in 2017. These findings reveal the occurrence of a new wave of viral expansion in MG, six years after detection in the state of Para in 2015, with no human outbreaks to date reported. Coordinated work between local surveillance and support laboratories has been of major importance to ensure a quick response and implementation of contingency measures towards avoiding the occurrence of YF cases in humans.

scholarly journals Detection of Yellow Fever Virus in Sylvatic Mosquitoes during Disease Outbreaks of 2017–2018 in Minas Gerais State, Brazil

Insects ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 136 ◽  
Author(s):  
Guilherme Garcia Pinheiro ◽  
Marcele Neves Rocha ◽  
Maria Angélica de Oliveira ◽  
Luciano Andrade Moreira ◽  
José Dilermando Andrade Filho
Keyword(s):  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Disease Outbreaks ◽  
Minas Gerais ◽  
Fever Virus ◽  
Metropolitan Region ◽  
Pcr Analysis ◽  
Urban Centers ◽  
Conservation Units ◽  
Belo Horizonte

Brazil has experienced several arbovirus outbreaks in recent years, among which yellow fever stands out. The state of Minas Gerais faced outbreaks of sylvatic yellow fever in 2017 and 2018, with 1002 confirmed cases and 340 deaths. This work presents the results of survey efforts to detect the yellow fever virus in mosquitoes from two conservation areas in the metropolitan region of Belo Horizonte, Brazil. A total of 867 mosquitoes of 20 species were collected between September 2017 and May 2018, the most abundant being Psorophora (Janthinosoma) ferox (von Humboldt, 1819) (31.3%), Limatus durhamii Theobald, 1901 (19.1%) and Haemagogus (Haemagogus) janthinomys Dyar, 1921 (18.2%). Total RNA was extracted from the mosquitoes for real-time PCR analysis for yellow fever, chikungunya, mayaro, Zika and dengue viruses. The yellow fever infection rate was 8.2% for Hg. janthinomys (13 mosquitoes), which is the main vector of sylvatic yellow fever in Brazil. In addition to surveying the mosquito fauna of these conservation units, this work demonstrates the importance of monitoring the circulation of viruses near large urban centers.

scholarly journals 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

2020 ◽  
Vol 14 (10) ◽  
pp. e0008658
Author(s):  
Lívia Sacchetto ◽  
Natalia Ingrid Oliveira Silva ◽  
Izabela Maurício de Rezende ◽  
Matheus Soares Arruda ◽  
Thais Alkifeles Costa ◽  
...  
Keyword(s):  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Minas Gerais ◽  
Fever Virus ◽  
Minas Gerais State ◽  
Urban Rural ◽  
Rural Transition ◽  
Transition Areas

scholarly journals Reemergence of yellow fever virus in southeastern Brazil, 2017-2018: what sparked the spread?

2021 ◽  
Author(s):  
Joelle I. Rosser ◽  
Karin Nielsen-Saines ◽  
Eduardo Saad ◽  
Trevon Fuller
Keyword(s):  
Rural Area ◽  
Yellow Fever ◽  
Rural Areas ◽  
Urban Areas ◽  
Yellow Fever Virus ◽  
Outdoor Exposure ◽  
Minas Gerais ◽  
Fever Virus ◽  
Southeastern Brazil ◽  
Severe Drought

AbstractBackgroundThe 2017-2018 yellow fever virus (YFV) outbreak in southeastern Brazil marked a reemergence of YFV in urban states that had been YFV free for nearly a century. Unlike earlier urban YFV transmission, this epidemic was also driven by forest mosquitos. The objective of this study was to evaluate environmental drivers of this outbreak.Methodology/Principal FindingsUsing surveillance data from the Brazilian Ministry of Health of human and non-human primate (NHP) cases of yellow fever, we traced the spatiotemporal progression of the outbreak. We then assessed the epidemic timing in relation to drought using a monthly Standardized Precipitation Evapotranspiration Index (SPEI). Lastly, we evaluated demographic risk factors for rural or outdoor exposure amongst YFV cases. Both human and NHP cases were first identified in a hot, dry, rural area in northern Minas Gerais before spreading southeast into the more cool, wet urban states of Espírito Santo, São Paulo, and Rio de Janeiro. Outbreaks also coincided with drought in all four southeastern states of Brazil. Confirmed YFV cases had an increased odds of being male (OR 2.58; 95% CI 2.28-2.92), working age (OR: 2.03; 95% CI: 1.76-2.35), and reporting recent travel from an urban to a rural area (OR: 5.02; 95% CI: 3.76-6.69).Conclusions/SignificanceThe 2017-2018 YFV epidemic in Brazil originated in hot, dry rural areas of Minas Gerais before expanding south into urban centers. An unusually severe drought in this region may have created environmental pressures that sparked the reemergence of YFV in Brazil’s southeastern cities.Author SummaryIn 2017-2018, cities in southeastern Brazil experienced an unusual outbreak of yellow fever virus. In the early 20th century, these cities had large outbreaks of yellow fever, spread by Aedes mosquitos. But until this recent outbreak, they had been free of yellow fever for nearly a century. While this outbreak was spread by Haemagogous forest mosquitos, the reemergence of yellow fever in densely populated urban areas raises serious concerns about it reestablishing ongoing transmission in cities, spread by urban Aedes mosquitos. Our study sought to understand how and why yellow fever virus remerged in this area. We traced the outbreak, finding that it started in hot, dry, rural areas and spread south into cool, wet urban areas. Additionally, the outbreak coincided with a severe drought; this extreme weather may have promoted the spread of yellow fever. Infection was also associated with rural and outdoor exposure, further suggesting this epidemic originated in rural areas.

scholarly journals Yellow fever virus outbreak in Brazil under current and future climate

2021 ◽  
Vol 6 ◽  
pp. 664-677
Author(s):  
Tara Sadeghieh ◽  
Jan M. Sargeant ◽  
Amy L. Greer ◽  
Olaf Berke ◽  
Guillaume Dueymes ◽  
...  
Keyword(s):  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Fever Virus ◽  
Future Climate

scholarly journals Yellow Fever Outbreak in Eastern Senegal, 2020–2021

Viruses ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1475
Author(s):  
Moussa Moïse Diagne ◽  
Marie Henriette Dior Ndione ◽  
Alioune Gaye ◽  
Mamadou Aliou Barry ◽  
Diawo Diallo ◽  
...  
Keyword(s):  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Mosquito Species ◽  
Virus Transmission ◽  
Genomic Analysis ◽  
Hemorrhagic Fever ◽  
Fever Virus ◽  
World Health ◽  
Effective Vaccine ◽  
Ministry Of Health

Yellow fever virus remains a major threat in low resource countries in South America and Africa despite the existence of an effective vaccine. In Senegal and particularly in the eastern part of the country, periodic sylvatic circulation has been demonstrated with varying degrees of impact on populations in perpetual renewal. We report an outbreak that occurred from October 2020 to February 2021 in eastern Senegal, notified and managed through the synergistic effort yellow fever national surveillance implemented by the Senegalese Ministry of Health in collaboration with the World Health Organization, the countrywide 4S network set up by the Ministry of Health, the Institut Pasteur de Dakar, and the surveillance of arboviruses and hemorrhagic fever viruses in human and vector populations implemented since mid 2020 in eastern Senegal. Virological analyses highlighted the implication of sylvatic mosquito species in virus transmission. Genomic analysis showed a close relationship between the circulating strain in eastern Senegal, 2020, and another one from the West African lineage previously detected and sequenced two years ago from an unvaccinated Dutch traveler who visited the Gambia and Senegal before developing signs after returning to Europe. Moreover, genome analysis identified a 6-nucleotide deletion in the variable domain of the 3′UTR with potential impact on the biology of the viral strain that merits further investigations. Integrated surveillance of yellow fever virus but also of other arboviruses of public health interest is crucial in an ecosystem such as eastern Senegal.

YELLOW FEVER VIRUS

1929 ◽  
Vol 92 (7) ◽  
pp. 550 ◽  
Author(s):  
HENRIQUE DE BEAUREPAIRE ARAGÃO
Keyword(s):  
Yellow Fever ◽  
Yellow Fever Virus ◽  
Fever Virus

Complete nucleotide sequence of yellow fever virus vaccine strains 17DD and 17D-213

1995 ◽  
Vol 35 (1) ◽  
pp. 35-41 ◽  
Author(s):  
Claudia N. Duarte dos Santos ◽  
Paulo R. Post ◽  
Ricardo Carvalho ◽  
Idevaldo I. Ferreira ◽  
Charles M. Rice ◽  
...  
Keyword(s):  
Nucleotide Sequence ◽  
Yellow Fever ◽  
Virus Vaccine ◽  
Complete Nucleotide Sequence ◽  
Yellow Fever Virus ◽  
Fever Virus
Sign in / Sign up

Export Citation Format

Share Document