Retroviruses
Mostrando 13-24 de 1533 artigos, teses e dissertações.
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13. Hemoplasmas em gatos domésticos: Prevalência e sua associação à infecção natural pelos vírus das imunodeficiência e/ou leucemia felinas. / Hemoplasmas in domestic cats: Prevalence and its association to the Feline Immunodeficiency Virus and/or Feline Leukemia Virus natural infections.
As doenças infecto-contagiosas possuem uma alta morbidade entre os gatos domésticos e um diagnóstico impreciso ou retardado pode resultar no óbito do paciente. A associação entre infecções pelos vírus da imunodeficiência (FIV) e/ou leucemia (FeLV) felina com hemoplasmas possui grande importância na clínica médica, uma vez que os agentes podem ag
Publicado em: 2008
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14. Frequência de leucemia e imunodeficiência viral felina em uma população hospitalar
Retroviruses make up a family of RNA virus that includes many agents of veterinary importance. The transcriptase reverse enzyme allows viral RNA to serve as template for production of a double-stranted DNA provirus. This provirus is then inserted in to the host?s genome. Two feline retroviruses have been identified that may cause immunodeficiency syndrome ?
Publicado em: 2007
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15. Prevalence of the hepatitis B and C among infected by human retrovirus in the city of Salvador - BA. / Prevalência das hepatites B e C em pacientes infectados por retrovírus humanos na cidade de Salvador-BA.
The virus of the hepatitis C and B affect 170 millions and 2 billions of persons, respectively, worldwide. The hepatitis C presents generally as assintomtic infection and rarely fulminating. However, it is estimated that 80% of the cases evolve a chronic infection, and, of those, 50% result in cirrhosis and/or hepatocarcinoma. The hepatitis B is also an impo
Publicado em: 2006
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16. Human endogenous retrovirus type I-related viruses have an apparently widespread distribution within vertebrates.
Retroviruses from lower vertebrate hosts have been poorly characterized to date. Few sequences have been isolated, and those which have been reported are all highly divergent when compared to the retroviruses known to be harbored by mammals and birds. Here we show that retroviruses with significant homology to the human endogenous retrovirus type I (HERV-I)
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17. Improved Mg2+-Based Reverse Transcriptase Assay for Detection of Primate Retroviruses
The reverse transcriptase (RT) assay is a simple, relatively inexpensive, widely used assay that can detect all retroviruses (known and novel retroviruses as well as infectious and defective retroviruses) on the basis of the divalent cation requirement of their RT enzyme, i.e., Mg2+ or Mn2+. Descriptions of various RT assays have been published; however, the
American Society for Microbiology.
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18. Standardized and simplified nomenclature for proteins common to all retroviruses.
We propose a revised standardized nomenclature for the proteins common to all retroviruses on the basis of biological function, enzymatic activity, and/or virion location data. (We do not discuss proteins specific for subfamilies or only some retroviruses.)
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19. RNAs from genetically distinct retroviruses can copackage and exchange genetic information in vivo.
Sequence analysis suggests that ancient recombination events may have occurred between genetically distinct retroviruses. An experimental system was utilized to explore the genetic interaction between different viruses. Moloney murine sarcoma virus and spleen necrosis virus are type C retroviruses that belong to different subgenera. With vectors containing p
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20. Serological definition of the lentivirus group of retroviruses.
The major polypeptides of visna viruses and other lentiviruses have been isolated and shown to be closely related if not identical in radioimmunoassays. By this criterion the lentiviruses form a distinct group of retroviruses unrelated to spuma viruses, mammalian and avian retroviruses that cause tumors, and unclassified retroviruses of cattle and horses. Tw
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21. Spleen necrosis virus, an avian immunosuppressive retrovirus, shares a receptor with the type D simian retroviruses.
The reticuloendotheliosis viruses (REV) are a family of highly related retroviruses isolated from gallinaceous birds. On the basis of sequence comparison and overall genome organization, these viruses are more similar to the mammalian type C retroviruses than to the avian sarcoma/leukemia viruses. The envelope of a member of the REV family, spleen necrosis v
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22. A proposal for a new approach to a preventive vaccine against human immunodeficiency virus type 1.
Human immunodeficiency virus type 1 (HIV-1) is a more complex retrovirus, coding for several accessory proteins in addition to the structural proteins (Gag, Pol, and Env) that are found in all retroviruses. More complex retroviruses have not been isolated from birds, and simpler retroviruses have not been isolated from humans. However, the proviruses of many
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23. Transcription termination and polyadenylation in retroviruses.
The provirus structure of retroviruses is bracketed by long terminal repeats (LTRs). The two LTRs (5' and 3') are identical in nucleotide sequence and organization. They contain signals for transcription initiation as well as termination and cleavage polyadenylation. As in eukaryotic pre-mRNAs, the two common signals, the polyadenylation signal, AAUAAA, or a
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24. Ross River Virus Glycoprotein-Pseudotyped Retroviruses and Stable Cell Lines for Their Production
Pseudotyped retroviruses have important applications as vectors for gene transfer and gene therapy and as tools for the study of viral glycoprotein function. Recombinant Moloney murine leukemia virus (Mo-MuLV)-based retrovirus particles efficiently incorporate the glycoproteins of the alphavirus Ross River virus (RRV) and utilize them for entry into cells. S
American Society for Microbiology.