Virus - Classification Flashcards
What is viral naming based on?
Host they infect(Swine Flu)
Geographic locaiton(Ebola)
Scientist of Discovery(Epstein-Barr)
Where in body(Rhinovirus)
How contracted(Influenza)
Cytopathic effect(Respiratory Syncytial Virus)
Combinaiton(Rous Sarcoma Virus)
What two committes deal with viral nomenclature?
International committee of the taxonomy of viruses(ICTV)
Baltimore System of Virus Classificaiton
What is the critera of the ICTV?
Develop, refine and maintain a universal virus taxonomy applying to all viruses, meeting every 3 years.
What is ICTV based on
Phenotypes like genome composition, capsid structre, enevelop presence, host range and pathogenicity
What genotypic characteristics can ICTV be based on?
Sequence similarity, gene contents, gene synteny, gene expression system and phylogenetic relationship
What naming does ICTV used?
Traditional Linnaeues taxonomy.
What is an example of ICTV naming?
Monkeyvirus based on Hemagglutinin and Phylogenetic analysis(closesly related to VACV and smallpox
What family do all pox viruses derive from?
Poxviridae
What is the valtimore system based on?
Viral genome must make mRNA that can be read by host irobomes, all viruses following this rule.
What is +ssRNA?
This is genetic material that is ready for translation into proteins.
What is -ssRNA?
These have to first convert into +ssRNA.
What is dsRNA?
Converted into both +ssRNA and -ssRNA when segregated.
What are the classes of virus in the baltimore system?
1 -dsDNA(Adenovirus)
2 ssDNA(Phage M13)
3 -RNA(reovirus)
4 -+RNA(Cornoaviruses)
5 –RNA(Rhabdovirus)
6 -+RNA(Retrovirus
7 -+ssRNA(Hepatitis virus)
What are diseases namd by?
WHO, like monkeypox and covid.
What are species named by?
ICTV
