Redirected from Viral classifications
Viruses can be classified in several ways. The most useful is probably by the type of nucleic acid the virus contains, but they can also be classified:
- by their geometry
- by whether they have envelopes
- by the identity of the host organism they can infect
- by mode of transmission
- by the type of disease they cause
Classification by type of constituent nucleic acid (i.e. by genome type), with examples:
- Class I double stranded DNA.
- Class II single stranded DNA.
- Parvovirus (most depend on coinfection with adenoviruses for growth)
- Class III double stranded RNA.
- Class IV positive single stranded RNA itself acting as mRNA.
- Class V negative single stranded RNA used as a template for mRNA synthesis.
- Class VI positive single stranded RNA with a DNA intermediate in replication.
- Class VII double stranded DNA with an RNA intermediate in replication.