Insect Viruses
Mostrando 1-12 de 147 artigos, teses e dissertações.
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1. Inhibition of Brazilian ZIKV strain replication in primary human placental chorionic cells and cervical cells treated with nitazoxanide
ABSTRACT Zika virus (ZIKV) infection during pregnancy is associated with a congenital syndrome. Although the virus can be detected in human placental tissue and sexual transmission has been verified, it is not clear how the virus reaches the fetus. Despite the emerging severity caused by ZIKV infection, no specific prophylactic and/or therapeutic treatment i
Braz J Infect Dis. Publicado em: 2020-12
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2. Comparative bio-efficacy of nuclear polyhedrosis virus (NPV) and Spinosad against American bollwormm, Helicoverpa armigera (Hubner)
ABSTRACT American bollworm (ABW), Helicoverpa armigera (Hubner), is considered as a major pest of cotton, Gossypium hirsutum, all over the globe. Due to its destructive feeding nature and continuous consumption of the same chemicals, it devolved resistant against many insecticides. Therefore, a combined application of bio- and synthetic-pesticide need to eva
Rev. Bras. entomol.. Publicado em: 13/01/2020
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3. Identification of Zika virus in immature phases of Aedes aegypti and Aedes albopictus: a surveillance strategy for outbreak anticipation
A progressive increase in the circulation of arboviruses in tropical countries has been observed, accounting for 700,000 yearly deaths in the world. The main objective of this article was to identify the presence of Zika (ZIKV), dengue (DENV), and Chikungunya (CHIKV) viruses in immature stages of Aedes aegypti and Ae. albopictus. Household collections of imm
Braz J Med Biol Res. Publicado em: 07/11/2019
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4. The insect reservoir of biodiversity for viruses and for antiviral mechanisms
Abstract: Insects are the most diverse group of animals. They can be infected by an extraordinary diversity of viruses. Among them, arthropod-borne viruses (arboviruses) can be transmitted to humans. High-throughput sequencing of small RNAs from insects provides insight into their virome, which may help understand the dynamics of vector borne infectious dise
An. Acad. Bras. Ciênc.. Publicado em: 03/06/2019
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5. Comparative assessment of the replication efficiency of dengue, yellow fever, and chikungunya arboviruses in some insect and mammalian cell lines
Abstract INTRODUCTION: Insect cell cultures play an essential role in understanding arboviral replication. However, the replicative efficiency of some of these viruses such as dengue (DENV), yellow fever (YFV), and chikungunya (CHIKV) in a new cellular substrate (Lulo) and in the other two recognized cell lines has not been comparatively assessed. METHODS:
Rev. Soc. Bras. Med. Trop.. Publicado em: 25/04/2019
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6. Viruses vector control proposal: genus Aedes emphasis
Abstract The dengue fever is a major public health problem in the world. In Brazil, in 2015, there were 1,534,932 cases, being 20,320 cases of severe form, and 811 deaths related to this disease. The distribution of Aedes aegypti, the vector, is extensive. Recently, Zika and Chikungunya viruses had arisen, sharing the same vector as dengue and became a huge
Braz J Infect Dis. Publicado em: 2017-08
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7. Bioactivity of plant extracts on the larval and pupal stages of Aedes aegypti (Diptera, Culicidea)
Introduction Aedes aegypti is responsible for the transmission of the dengue and yellow fever viruses. This study evaluated the effects of extracts from Cnidosculos phyllacanthus, Ricinus communis, and Coutarea hexandra on the developmental periods of A.aegypti larvae and pupae. Crude extracts of C. phyllacanthus and C. hexandra and oil from R. communis and
Rev. Soc. Bras. Med. Trop.. Publicado em: 2013-07
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8. Contribution of molecular biology to the improvement of insect viruses as biological control products.
A biologia molecular desempenha um importante papel na compreensao das propriedades biologicas dos virus de insetos utilizados no controle biologico de insetos-praga. A biologia molecular pode, tambem, ser utilizada para melhorar ou manter a eficacia dos produtos utilizados no controle biologico de insetos. Existem descricoes de 300 a 500 baculovirus de vari
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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9. Estratégias de Produção in vitro de Bioinseticida Viral: influências do Isolado, da Cinética e do Modo de operação
Societal concerns about environmental sustainability has lead to the development of ecologically-friendly alternatives to chemical insecticides for crop protection. One such alternative is biological pest control. In particular, baculoviruses are well suited as insect biopesticides due to their narrow host specificity and relative ease of propagation. In Bra
Publicado em: 2010
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10. Germ band retraction as a landmark in glucose metabolism during Aedes aegypti embryogenesis
Background: The mosquito A. aegypti is vector of dengue and other viruses. New methods of vector control are needed and can be achieved by a better understanding of the life cycle of this insect. Embryogenesis is a part of A. aegypty life cycle that is poorly understood. In insects in general and in mosquitoes in particular energetic metabolism is well studi
Publicado em: 2010
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11. Título Principal Toxinas recombinantes Cry2Aa e Cry11A de Bacillus thuringiensis expressas em células de inseto são tóxicas para larvas de Lepidoptera e Diptera
Bacillus thuringiensis (Bt) is a Gram positive, tomopathogenic bacteria that produces crystalline inclusions called !-endotoxins or Cry proteins. These proteins are highly toxic to susceptible insects, not showing activity against others organisms. Some expression systems have been used to express crystal proteins with the aim to increase their toxicity for
Publicado em: 2009
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12. Bases ecológicas para o manejo de Bemisia tabaci (Genn.) biótipo B (Hemiptera: Aleyrodidae) em sistemas orgânicos de produção de tomate
The whitefly Bemisia tabaci biotype B stands out, among the diverse community of pest herbivores that colonize the tomato crop, due to the direct damages and transmission of several pathogenic viruses (Geminiviridae) causing productivity losses. The spraying of insecticides for its control selects resistant populations and promotes the dispersion of adults t
Publicado em: 2009