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Retrovirus Life Cycles01:10

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Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
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Retroviruses02:33

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A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
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Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
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Gyrovirus: current status and challenge.

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Summary
This summary is machine-generated.

Gyroviruses (GyVs) are widespread, small DNA viruses impacting poultry, notably chicken anemia virus (CAV). Further research is crucial for understanding their ubiquity, pathogenicity, and developing effective control strategies for the poultry industry.

Keywords:
epidemiologygenetic evolutiongyrovirusimmunopathogenesispathogenicity

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Area of Science:

  • Virology
  • Molecular Biology
  • Animal Health

Background:

  • Gyroviruses (GyVs), small, single-stranded DNA viruses in the family Anelloviridae, exhibit global distribution and apparent pan-tropism.
  • High-throughput sequencing (HTS) has identified numerous GyV species in various avian hosts.
  • Chicken anemia virus (CAV) is a notable GyV species pathogenic to poultry, causing significant economic losses.

Purpose of the Study:

  • To review current knowledge on GyVs, focusing on their characteristics, epidemiology, evolution, and pathogenicity.
  • To discuss the association between GyVs and avian diseases and their economic impact on the poultry industry.
  • To explore future prevention and control strategies for GyVs.

Main Methods:

  • Literature review synthesizing existing research on GyVs.
  • Analysis of epidemiological data and genetic evolution of GyVs.
  • Examination of pathogenicity studies and immunopathogenesis of GyV infections.

Main Results:

  • GyVs are globally distributed with diverse host ranges.
  • Several GyV species, including CAV, are pathogenic to poultry, leading to economic losses.
  • The precise role of GyVs in disease etiology and their ubiquity mechanisms require further investigation.

Conclusions:

  • Understanding GyV morphofunctional properties, epidemiology, and pathogenicity is essential.
  • Developing virus culture systems, optimizing surveillance, and creating vaccines are critical for GyV control.
  • Further research is needed to fully elucidate GyV's impact on avian health and the poultry industry.