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Juliana Silva Nogueira - One of the best experts on this subject based on the ideXlab platform.
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Possible non-sylvatic transmission of yellow fever between non-human primates in São Paulo city, Brazil, 2017–2018
Scientific Reports, 2020Co-Authors: Mariana Sequetin Cunha, Rosa Maria Tubaki, Regiane Maria Tironi Menezes, Mariza Pereira, Giovana Santos Caleiro, Esmenia Coelho, Leila Del Castillo Saad, Natalia Coelho Couto De Azevedo Fernandes, Juliana Mariotti Guerra, Juliana Silva NogueiraAbstract: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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Possible non-sylvatic transmission of yellow fever between non-human primates in São Paulo city, Brazil, 2017-2018.
Scientific Reports, 2020Co-Authors: Mariana Sequetin Cunha, Rosa Maria Tubaki, Regiane Maria Tironi Menezes, Mariza Pereira, Giovana Santos Caleiro, Esmenia Coelho, Juliana Mariotti Guerra, Leila Del Castillo Saad, Natália Coelho Couto De Azevedo Fernandes, Juliana Silva NogueiraAbstract: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 Sao 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 Sao Paulo urban area was detected mainly in resident marmosets, and synanthropic mosquitoes were likely involved in viral transmission.
Mariana Sequetin Cunha - One of the best experts on this subject based on the ideXlab platform.
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Possible non-sylvatic transmission of yellow fever between non-human primates in São Paulo city, Brazil, 2017–2018
Scientific Reports, 2020Co-Authors: Mariana Sequetin Cunha, Rosa Maria Tubaki, Regiane Maria Tironi Menezes, Mariza Pereira, Giovana Santos Caleiro, Esmenia Coelho, Leila Del Castillo Saad, Natalia Coelho Couto De Azevedo Fernandes, Juliana Mariotti Guerra, Juliana Silva NogueiraAbstract: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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Possible non-sylvatic transmission of yellow fever between non-human primates in São Paulo city, Brazil, 2017-2018.
Scientific Reports, 2020Co-Authors: Mariana Sequetin Cunha, Rosa Maria Tubaki, Regiane Maria Tironi Menezes, Mariza Pereira, Giovana Santos Caleiro, Esmenia Coelho, Juliana Mariotti Guerra, Leila Del Castillo Saad, Natália Coelho Couto De Azevedo Fernandes, Juliana Silva NogueiraAbstract: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 Sao 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 Sao Paulo urban area was detected mainly in resident marmosets, and synanthropic mosquitoes were likely involved in viral transmission.
Ricardo Lourenço-de-oliveira - One of the best experts on this subject based on the ideXlab platform.
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High Speed Video Documentation of the Mosquito Sabethes albiprivus Egg-Catapulting Oviposition Behavior (Diptera: Culicidae)
Neotropical Entomology, 2020Co-Authors: Genilton Vieira, Maria Ignez Bersot, Glauber Rocha Pereira, Filipe Vieira Santos De Abreu, Agostinho Cardoso Nascimento-pereira, Maycon Sebastião Alberto Santos Neves, Maria Goreti Rosa-freitas, Monique Albuquerque Motta, Ricardo Lourenço-de-oliveiraAbstract:The oviposition behavior of mosquitoes varies between species. We documented the unusual mechanism of egg laying in the mosquito Sabethes albiprivus Theobald with the aid of high speed video recordings in the laboratory. A sapucaia ( Lecythis pisonis Camb.) nut oviposition trap, described herein, was used to simulate a tree hole with a small opening, which is the natural larval habitat of Sa. albiprivus . We showed that females approach the opening and perform a sequence of rapid, short up-and-down flights before egg laying. At this time, the egg is already visible externally, being held at the very tip of the abdomen. Females catapult one egg at a time by rapidly curling their abdomen downward, sending the egg through the opening while their legs are positioned in different configurations throughout the event. The estimated velocity of the catapulted eggs was almost 1 m/s.
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Oviposition in flight: the Sabethes albiprivus incredible egg throwing behavior
2020Co-Authors: Genilton Vieira, Maria Ignez Bersot, Glauber Rocha Pereira, Filipe Vieira Santos De Abreu, Agostinho Cardoso Nascimento-pereira, Maycon Sebastião Alberto Santos Neves, Maria Goreti Rosa-freitas, Monique De Albuquerque Motta, Ricardo Lourenço-de-oliveiraAbstract:Mosquitoes display highly variable oviposition strategies and behavior. By using a high-speed camera, we detailly documented for the first time the egg-throwing strategy of the sylvatic yellow fever vector Sabethes albiprivus Theobald in laboratory. An oviposition trap made with sapucaia nut for field collection of tree-hole mosquitoes and obtaining Sa. albiprivus eggs either in the field or in the laboratory colony is described.
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Low vector competence in sylvatic mosquitoes limits Zika virus to initiate an enzootic cycle in South America
Scientific Reports, 2019Co-Authors: Rosilainy S. Fernandes, Maria Ignez Bersot, Marcia G. Castro, Erich Loza Telleria, Anielly Ferreira-de-brito, Lidiane M. Raphael, Myrna C. Bonaldo, Ricardo Lourenço-de-oliveiraAbstract:Zika virus (ZIKV) has spread in the Americas since 2015 and the potential establishment of a sylvatic transmission cycle in the continent has been hypothesized. We evaluated vector competence of five sylvatic Neotropical mosquito species to two ZIKV isolates. Distinct batches of Haemagogus leucoceleanus , Sabethes albiprivus , Sabethes identicus , Aedes terrens and Aedes scapularis females were respectively orally challenged and inoculated intrathoracically with ZIKV. Orally challenged mosquitoes were refractory or exhibited low infection rates. Viral dissemination was detected only in Hg. leucocelaenus , but with very low rates. Virus was not detected in saliva of any mosquito orally challenged with ZIKV, regardless of viral isolate and incubation time. When intrathoracically injected, ZIKV disseminated in high rates in Hg. leucocelaenus , Sa. identicus and Sa. albpiprivus , but low transmission was detected in these species; very low dissemination and no transmission was detected in Ae. terrens and Ae. scapularis . Together these results suggest that genetically determined tissue barriers, especially in the midgut, play a vital role in inhibiting ZIKV for transmission in the tested sylvatic mosquito species. Thus, an independent enzootic transmission cycle for ZIKV in South America is very unlikely.
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Potential risk of re-emergence of urban transmission of Yellow Fever virus in Brazil facilitated by competent Aedes populations.
Scientific Reports, 2017Co-Authors: Dinair Couto-lima, Maria Ignez Bersot, Stephanie Silva Campos, Monique De Albuquerque Motta, Flávia Barreto Dos Santos, Pedro Fernando Da Costa Vasconcelos, Marie Vazeille, Yoann Madec, Ricardo Lourenço-de-oliveira, Anna-bella FaillouxAbstract:Yellow fever virus (YFV) causing a deadly viral disease is transmitted by the bite of infected mosquitoes. In Brazil, YFV is restricted to a forest cycle maintained between non-human primates and forest-canopy mosquitoes, where humans can be tangentially infected. Since late 2016, a growing number of human cases have been reported in Southeastern Brazil at the gates of the most populated areas of South America, the Atlantic coast, with Rio de Janeiro state hosting nearly 16 million people. We showed that the anthropophilic mosquitoes Aedes aegypti and Aedes albopictus as well as the YFV-enzootic mosquitoes Haemagogus leucocelaenus and Sabethes albiprivus from the YFV-free region of the Atlantic coast were highly susceptible to American and African YFV strains. Therefore, the risk of reemergence of urban YFV epidemics in South America is major with a virus introduced either from a forest cycle or by a traveler returning from the YFV-endemic region of Africa.
Ralph E. Harbach - One of the best experts on this subject based on the ideXlab platform.
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Two new species of the subgenus Sabethinus of Sabethes (Diptera: Culicidae) from Costa Rica, first confirmation of members of the subgenus in Central America
Zootaxa, 2018Co-Authors: Ralph E. HarbachAbstract:Two new species of Sabethes subgenus Sabethinus (Diptera: Culicidae) from Costa Rica are formally named Sa. andreae and Sa. theresae . Descriptions consisting of differential and diagnostic morphological characters are provided for adults, male genitalia and fourth-instar larvae. The male genitalia and the fourth-instar larva and pupa of both species are illustrated. The species are compared with the four previously described species known to occur only in South America, i.e. Sa. idiogenes , Sa. intermedius , Sa. melanonymphe and Sa. xhyphydes . A new country record for Colombia is reported for Sa. xhyphydes and keys are provided to distinguish the adults and larvae of the six species.
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Sabethes (Peytonulus) luxodens, a new species of Sabethini (Diptera: Culicidae) from Ecuador.
Memórias do Instituto Oswaldo Cruz, 1999Co-Authors: Clinton R Hall, Theresa M. Howard, Ralph E. HarbachAbstract:The adult male, larva and pupa of Sabethes (Peytonulus) luxodens, a new species from Ecuador, are described. The species is distinguished from Sabethes aurescens (Lutz), which it closely resembles in all life stages
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two new species of the subgenus peytonulus of Sabethes diptera culicidae from colombia
Memorias Do Instituto Oswaldo Cruz, 1995Co-Authors: Ralph E. HarbachAbstract:The adults and male genitalia of two new species of Sabethes subgenus Peytonulus are described from Colombia. The male genitalia are illustrated and the species are distinguished from one another and other members of the subgenus.
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The subgenus Sabethinus of Sabethes (Diptera: Culicidae)
Systematic Entomology, 1994Co-Authors: Ralph E. HarbachAbstract:The subgenus Sabethinus of Sabethes is redescribed and defined on the basis of shared morphological features observed in the adult, larval and pupal stages of four known species, two of which are described as new. Each species is described and illustrated in detail, and keys are provided for the identification of the adult and larval stages. The treatment of each species also includes an annotated summary of previous literature, a brief systematic discussion and information on bionomics and distribution. The species comprising the subgenus are Sa.intermedius, Sa.melanonymphe, Sa.xhyphydes sp.n. and
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Two Species Previously Confused Under the Concept of Sabethes Tarsopus in Central America (Diptera: Culicidae)
Mosquito systematics, 1992Co-Authors: Ralph E. Harbach, John L PetersenAbstract:Abstract : Sabethes gymnothorax new species is separated from Sabethes tarsopus, and the adults, fourth-instar larva and pupa of both species are described and illustrated. Bionomic and taxonomic information is provided.
Pedro Fernando Da Costa Vasconcelos - One of the best experts on this subject based on the ideXlab platform.
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Potential risk of re-emergence of urban transmission of Yellow Fever virus in Brazil facilitated by competent Aedes populations.
Scientific Reports, 2017Co-Authors: Dinair Couto-lima, Maria Ignez Bersot, Stephanie Silva Campos, Monique De Albuquerque Motta, Flávia Barreto Dos Santos, Pedro Fernando Da Costa Vasconcelos, Marie Vazeille, Yoann Madec, Ricardo Lourenço-de-oliveira, Anna-bella FaillouxAbstract:Yellow fever virus (YFV) causing a deadly viral disease is transmitted by the bite of infected mosquitoes. In Brazil, YFV is restricted to a forest cycle maintained between non-human primates and forest-canopy mosquitoes, where humans can be tangentially infected. Since late 2016, a growing number of human cases have been reported in Southeastern Brazil at the gates of the most populated areas of South America, the Atlantic coast, with Rio de Janeiro state hosting nearly 16 million people. We showed that the anthropophilic mosquitoes Aedes aegypti and Aedes albopictus as well as the YFV-enzootic mosquitoes Haemagogus leucocelaenus and Sabethes albiprivus from the YFV-free region of the Atlantic coast were highly susceptible to American and African YFV strains. Therefore, the risk of reemergence of urban YFV epidemics in South America is major with a virus introduced either from a forest cycle or by a traveler returning from the YFV-endemic region of Africa.
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Yellow Fever
Revista da Sociedade Brasileira de Medicina Tropical, 2003Co-Authors: Pedro Fernando Da Costa VasconcelosAbstract:Yellow fever is an infectious and non-contagious disease caused by an arbovirus, the yellow fever virus. The agent is maintained in jungle cycles among primates as vertebrate hosts and mosquitoes, especially Aedes in Africa, and Haemagogus and Sabethes in America. Approximately 90% of the infections are mild or asymptomatic, while 10% course to a severe clinical picture with 50% case-fatality rate. Yellow fever is largely distributed in Africa where urban epidemics are still reported. In South America, between 1970-2001, 4,543 cases were reported, mostly from Peru (51.5%), Bolivia (20.1%) and Brazil (18.7%). The disease is diagnosed by serology (detection of IgM), virus isolation, immunohistochemistry and RT-PCR. Yellow fever is a zoonosis and cannot be eradicated, but it is preventable in man by using the 17D vaccine. A single dose is enough to protect an individual for at least 10 years, after which revaccination is recommended. In this paper, the main concepts about yellow fever as well as the fatal adverse effects of the vaccine are updated.
