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Related Concept Videos

Viruses with RNA Genomes01:29

Viruses with RNA Genomes

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RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
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Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
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Ribozymes02:47

Ribozymes

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The term ribozyme is used for RNA that can act as an enzyme. Ribozymes are mainly found in selected viruses, bacteria, plant organelles, and lower eukaryotes. Ribozymes were first discovered in 1982 when Tom Cech’s laboratory observed Group I introns acting as enzymes. This was shortly followed by the discovery of another ribozyme, Ribonulcease P, by Sid Altman’s laboratory. Both Cech and Altman received the Nobel Prize in chemistry in 1989 for their work on ribozymes.
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Viruses of Archaea01:29

Viruses of Archaea

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Archaeal viruses play a crucial role in the ecosystems of extremophilic archaea, particularly those belonging to the phyla Euryarchaeota and Crenarchaeota. By shaping host evolution and facilitating gene transfer, these viruses influence microbial communities and contribute to genetic diversity in extreme environments. The archaea they infect thrive in acidic hot springs and hydrothermal vents characterized by high temperatures and low pH. Archaeal viruses exhibit remarkable structural...
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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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Generation, Amplification, and Titration of Recombinant Respiratory Syncytial Viruses
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Respiratory RNA Viruses.

Richard L Hodinka1

  • 1Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville Health System, Greenville, SC 29605.

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Accurate diagnosis of viral respiratory infections, particularly in immunocompromised patients, is crucial. Advances in laboratory testing enable rapid and precise identification of RNA viruses, improving patient care and infection control.

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Area of Science:

  • Virology
  • Infectious Diseases
  • Public Health

Background:

  • Acute respiratory infections pose a significant global health burden, causing widespread illness and death.
  • Vulnerable populations include children, the elderly, and immunocompromised individuals.
  • RNA viruses like RSV, influenza, and coronaviruses are primary culprits in respiratory illnesses.

Purpose of the Study:

  • To detail the characteristics of RNA viruses causing respiratory tract diseases in immunocompromised hosts.
  • To emphasize the importance of laboratory diagnostics for accurate viral identification.
  • To highlight methods for rapid and definitive diagnosis impacting patient management and infection control.

Main Methods:

  • Review of fundamental characteristics of common respiratory RNA viruses.
  • Discussion of clinical significance in immunocompromised populations.
  • Overview of advanced laboratory diagnostic assays for rapid detection.

Main Results:

  • Clinical diagnosis of viral respiratory infections is challenging due to overlapping symptoms.
  • Laboratory testing is essential for definitive diagnosis.
  • Newer diagnostic technologies promise faster and more accurate results.

Conclusions:

  • Rapid and accurate laboratory diagnosis of respiratory RNA viruses is vital for immunocompromised patients.
  • Effective diagnostic strategies improve patient outcomes and aid in preventing outbreaks.
  • Understanding viral characteristics informs better infection control measures.