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Related Concept Videos

Viruses with RNA Genomes01:29

Viruses with RNA Genomes

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...
Viral Hepatitis I: Introduction01:28

Viral Hepatitis I: Introduction

Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion of food...
Retroviruses02:33

Retroviruses

Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
Viral Replication: Lytic Cycle01:20

Viral Replication: Lytic Cycle

Bacteriophages, or phages, are viruses that specifically infect bacteria. Among them, T-even bacteriophages, such as T4, exhibit a well-characterized lytic replication cycle in Escherichia coli (E. coli). This process ensures the rapid proliferation of the virus while ultimately leading to the destruction of the bacterial host.Attachment and DNA InjectionThe infection process begins with the recognition and binding of the T4 phage to the E. coli cell surface. Tail fibers of the phage...
Size and Structure of Viral Genomes01:26

Size and Structure of Viral Genomes

Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
Viral Mutations00:36

Viral Mutations

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 for adaptive...

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Updated: Jul 4, 2026

Pan-lyssavirus Real Time RT-PCR for Rabies Diagnosis
06:25

Pan-lyssavirus Real Time RT-PCR for Rabies Diagnosis

Published on: July 10, 2019

Lyssaviruses: current trends.

Susan A Nadin-Davis1, Christine Fehlner-Gardiner

  • 1Centre of Expertise for Rabies, Ottawa Laboratory (Fallowfield), Canadian Food Inspection Agency, Ottawa, ON, Canada.

Advances in Virus Research
|July 1, 2008
PubMed
Summary
This summary is machine-generated.

Technological advancements, including reverse genetics, enhance the study of rabies virus (RABV) biology and vaccine development. However, current knowledge remains insufficient for curing clinical rabies.

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Area of Science:

  • Virology
  • Immunology
  • Molecular Biology

Background:

  • Rabies remains a significant global health concern.
  • Traditional methods for studying rabies virus (RABV) have limitations.

Purpose of the Study:

  • To review recent technological advancements in rabies research.
  • To highlight their impact on understanding RABV biology, pathogenicity, and vaccine development.

Main Methods:

  • Reverse genetics for novel virus generation.
  • High-throughput methods for gene expression analysis.
  • Two-hybrid systems for protein-protein interaction studies.

Main Results:

  • Improved understanding of fundamental RABV biology and pathogenicity.
  • Development of novel vaccine constructs for rabies and other diseases.
  • Detailed insights into virus-host interactions.

Conclusions:

  • Technological progress has significantly advanced rabies research.
  • Further research is needed to develop effective treatments for clinical rabies.