Hepadnaviridae
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Hepatite B em Rondônia (região da Amazônia Ocidental, Brasil): análise descritiva e distribuição espacial
Contexto A Amazônia é uma das regiões que possui as maiores taxas de infecção pelo vírus da hepatite B do mundo. Objetivos Esse estudo teve como objetivo avaliar dados epidemiológicos e a distribuição espacial dos casos de hepatite B notificados no Estado de Rondônia no período de 2002 a 2012. Métodos Foram estudados dados clínicos e sociais de
Arq. Gastroenterol.. Publicado em: 2015-03
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2. Theories about evolutionary origins of human hepatitis B virus in primates and humans
Introduction: The human hepatitis B virus causes acute and chronic hepatitis and is considered one of the most serious human health issues by the World Health Organization, causing thousands of deaths per year. There are similar viruses belonging to the Hepadnaviridae family that infect non-human primates and other mammals as well as some birds. The majorit
Braz J Infect Dis. Publicado em: 2014-09
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3. Caracterização e análise filogenética dos genótipos do virus da Hepatite B circulantes em território brasileiro. / Characterization and phylogenetic analysis of Hepatitis B virus genotypes circulating in the Brazilian territory.
A hepatite B é definida como inflamação do fígado causada por uma infecção pelo Vírus da Hepatite B (HBV), um vírus de DNA, da família Hepadnaviridae. A hepatite B é um problema de saúde pública importante, existindo em todo mundo aproximadamente 350 milhões de portadores do vírus. O HBV pode ser dividido em oito genótipos principais, designad
Publicado em: 2008
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4. Diversidade genética do vírus da hepatite B no Brasil: genótipos, subgenótipos e recombinantes. / Genetic diversity of the hepatitis B virus from Brazil: genotypes, subgenotypes and recombinants.
O vírus da hepatite B (HBV), membro da família Hepadnaviridae, possui genoma de DNA circular com cerca de 3200 pb e quatro regiões abertas de leitura. Apesar do pequeno tamanho do genoma viral, uma grande diversidade genética é observada. O HBV é classificado em oito genótipos, designados de A a H, e pelo menos 24 subgenótipos com distintas distribui
Publicado em: 2008
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5. Identification of hepatitis B virus indigenous to chimpanzees
Hepatitis B viruses (HBV) and related viruses, classified in the Hepadnaviridae family, are found in a wide variety of mammals and birds. Although the chimpanzee has been the primary experimental model of HBV infection, this species has not been considered a natural host for the virus. Retrospective analysis of 13 predominantly wild-caught chimpanzees with c
The National Academy of Sciences.
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6. Methodological approaches to disinfection of human hepatitis B virus.
Three commercial disinfectants (two quaternary formulations and one phenolic) were tested against human hepatitis B virus (HHBV). The treated virus was assayed for infectivity by the chimpanzee assay and for morphological alteration by the Morphological Alteration and Disintegration Test. The same agents were tested against duck hepatitis B virus in a duck h
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7. Long PCR and its application to hepatitis viruses: amplification of hepatitis A, hepatitis B, and hepatitis C virus genomes.
In this study we amplified virtually the entire genomes of hepatitis A virus (a member of the Picornaviridae family), hepatitis B virus (a member of the Hepadnaviridae family), and hepatitis C virus (a member of the Flaviviridae family) by using the recently described technique of long PCR. In order to do this, we first demonstrated, using the lambda phage,
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8. An Infectious Clone of Woolly Monkey Hepatitis B Virus
Members of the Hepadnaviridae family have been isolated from birds, rodents, and primates. A new hepadnavirus isolated from the woolly monkey, a New World primate, is phylogenetically distinct from other primate isolates. An animal model has been established for woolly monkey hepatitis B virus (WMHBV) by using spider monkeys, since woolly monkeys are endange
American Society for Microbiology.
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9. The encapsidation signal on the hepatitis B virus RNA pregenome forms a stem-loop structure that is critical for its function.
Hepatitis B virus (HBV) is the type member of the hepadnaviridae, small enveloped DNA viruses that replicate through reverse transcription of an RNA intermediate, the pregenome. This reaction occurs usually inside the viral nucleocapsid, the assembly of which requires specific interactions between multiple copies of the core protein, the viral replication en
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10. Phenotypic mixing of rodent but not avian hepadnavirus surface proteins into human hepatitis B virus particles.
The virus family Hepadnaviridae comprises two genera: orthohepadnaviruses isolated from humans (hepatitis B virus [HBV]) and rodents (e.g., woodchuck hepatitis virus [WHV]) and avihepadnaviruses isolated from birds (e.g., duck hepatitis B virus [DHBV]). They carry in their envelopes two (DHBV) or three (HBV and WHV) coterminal proteins referred to as small (
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11. An intramolecular disulfide bridge between Cys-7 and Cys61 determines the structure of the secretory core gene product (e antigen) of hepatitis B virus.
Hepatitis B virus, the prototypic member of the Hepadnaviridae, is a small enveloped DNA virus that replicates via reverse transcription. Efficient usage of its compact 3.2-kb genome is exemplified by the pre-C/C gene from which two proteins with largely overlapping primary sequences but distinctly different properties are synthesized: the self-assembling co
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12. Detection of Duck Hepatitis B Virus DNA on Filter Paper by PCR and SYBR Green Dye-Based Quantitative PCR
Duck hepatitis B virus (DHBV) belongs to the Hepadnaviridae family, which includes human Hepatitis B virus (HBV) and Woodchuck hepatitis virus. It is widely distributed in wild and domestic ducks due to congenital transmission. HBV is a worldwide health problem, with carriers at risk of developing cirrhosis and liver cancer. Medical staff and scientists work
American Society for Microbiology.