O vírus do Nilo Ocidental

Flores, Eduardo Furtado; Weiblen, Rudi

doi:10.1590/s0103-84782008005000070

Cited by 6 publications

(7 citation statements)

References 32 publications

(72 reference statements)

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“…Some bird orders, i.e., the Passeriformes, Charadriiformes, and Falconiformes, are considerably more prone to developing disease than others, like the Galliformes, that can be infected but do not manifest any clinical signs 85,86 . In species belonging to Galliformes order, the clinical signs may be nonspecific and include depression, lethargy, erect feathers, anorexia, rapid weight loss, and neurological signs such as ataxia, paralysis, tremors, pedaling movements, circling, swimming in circles, abnormal head posture, torticollis, nystagmus, seizures, opisthotonos, and death [87][88][89][90] .…”

Section: Clinical Manifestations In Animalsmentioning

confidence: 99%

West Nile virus infections are here! Are we prepared to face another flavivirus epidemic?

Castro-Jorge

Siconelli

Ribeiro

et al. 2019

Rev. Soc. Bras. Med. Trop.

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Emerging arthropod-borne viruses (arboviruses), such as chikungunya and Zika viruses, are a major threat to public health in countries like Brazil where biodiversity is high and medical care is sometimes precarious. West Nile fever is a disease caused by the West Nile Virus (WNV), an RNA virus belonging to the Flaviviridae family. It is transmitted by infected mosquitoes to numerous animals like birds, reptiles and mammals, including human and non-human primates. In the last decade, the number of reported cases of WNV infection in humans and animals has increased in the Americas. Circulation of WNV in forests and rural areas in Brazil has been detected based on serological surveys and, in 2014, the first case of West Nile fever was confirmed in a patient from Piauí State. In 2018, the virus was isolated for the first time from a horse from a rural area in the state of Espírito Santo presenting with a neurological disorder; this raises the possibility that other cases of WNV encephalitis may have occurred without clinical recognition and without laboratory diagnosis by specific assays. The imminent WNV outbreak poses a challenge for Brazilian clinicians and researchers. In this review, we summarize the basic biological and ecological characteristics of this virus and the clinical presentation and treatment of febrile illnesses caused by WNV. We also discuss the epidemiological aspects, prophylaxis of WNV infections, and monitoring strategies that could be applied in the possibility of a WNV outbreak in Brazil.

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Section: Clinical Manifestations In Animalsmentioning

confidence: 99%

West Nile virus infections are here! Are we prepared to face another flavivirus epidemic?

Castro-Jorge

Siconelli

Ribeiro

et al. 2019

Rev. Soc. Bras. Med. Trop.

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“…Many of these birds, being they migratory, wild or domestic, are natural hosts and transmit various infectious viruses, such as Influenza A, West Nile and Newcastle Disease (Fernandes et al, 2010, Flores & Weiblen, 2009.…”

Section: Introductionmentioning

confidence: 99%

“…This family also includes other very important pathogens such as Dengue virus and Yellow Fever virus (Flores & Weiblen, 2009). There are two known WNV strains.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Influenza A, West Nile and Newcastle Disease Viruses in Birds from the Pantanal Wetlands of Mato Grosso, Brazil

Pinto

Ometto

Araújo

et al. 2016

Rev. Bras. Cienc. Avic.

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The Pantanal is the world's largest wetland biome with a seasonal flood pulse that attracts a great diversity of birds, many of which are migratory. Birds can be natural reservoirs Influenza A, West Nile and Newcastle Disease viruses. However, the occurrence of carriers for these viruses in the Pantanal was not verified yet. The present study evaluated the occurrence of natural infection by Influenza A, WN and ND virus of birds in the municipality of Poconé, a subregion of the Pantanal in the state of Mato Grosso, Brazil. A total of 76 birds belonging to 11 orders and 20 families were captured using mist nets. The most representative order was Passeriformes, followed by the other nine orders, which included Columbiformes, Psittaciformes, Charadriiformes and Anseriformes. The most representative family was Thamnophilidae, with 16 individuals (21.0%), followed by the family Tyrannidae with 10 individuals (7.6%) and the family Furnariidae, with eight individuals (10.5%). The bird species were identified, and cloacal and tracheal swab samples were collected. The samples were subjected to RNA extraction and tested for the presence of the three agents by real-time polymerase chain reaction (qRT-PCR). All the sampled birds were considered healthy, had no clinical sign of infection, and were tested negative for the three viruses. Based on our findings, we can conclude that Influenza, West Nile and Newcastle Disease viruses were absent from the samples in this region of the Pantanal wetlands during the period of this study.

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“…Following the initial outbreak, WNV progressively spread across the United States producing more than 25,000 human cases and around 1,200 deaths (7); near 30,000 horse cases and over 10,000 deaths (6). Extensive mortality among several bird species has also been documented during this outbreak (10).…”

mentioning

confidence: 99%

“…In Brazil, there are no official reports of human or animal WNV infections up to date. However, the progressive spread of WNV southwards into South America has led to the concern of its possible introduction in Brazilian tropical and subtropical areas, where it would encounter favorable environmental conditions for maintenance and transmission (6). Thus, epidemiological surveillance in wild birds and horses -considered natural sentinels for WNV activity -holds critical towards early detection and adoption of measures to prevent or minimize human exposure upon the introduction of the virus.…”

mentioning

confidence: 99%

Stable expression and potential use of West Nile virus envelope glycoproteins preM/E as antigen in diagnostic tests

Cargnelutti¹,

Brum²,

Weiblen³

et al. 2011

Braz. J. Microbiol.

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O vírus do Nilo Ocidental

Cited by 6 publications

References 32 publications

West Nile virus infections are here! Are we prepared to face another flavivirus epidemic?

West Nile virus infections are here! Are we prepared to face another flavivirus epidemic?

Investigation of Influenza A, West Nile and Newcastle Disease Viruses in Birds from the Pantanal Wetlands of Mato Grosso, Brazil

Stable expression and potential use of West Nile virus envelope glycoproteins preM/E as antigen in diagnostic tests

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