Classes
of
Animal
Viruses
Based
on
Genome
Nucleic
Acid
and
Transcriptional
Mechanism -
Class I |
Nucleic acid |
Virus group |
Representative |
| Class I | dsDNA | Papovaviruses Adenoviruses Herpesviruses
Poxviruses |
Polyoma virus, SV40 Human adenovirus Herpes simplex Types I&II Epstein Barr virus (EB) Variola major (smallpox) |
| Class II | ssDNA | Parvoviruses |
Adeno-associated virus (AAV). Mouse minute virus(MMV) |
| Class III | dsDNA | Reoviruses | Infantile gastroenteritis |
Class IV |
ssRNA (+)
|
|
|
| Class IVa | mRNA length= genome RNA length | Picornaviruses | Poliovirus |
| Class IVb | 2 sizes of mRNA | Togaviruses | Sindbis virus. Semliki forest virus (SFV) |
| Class V | ssRNA | ||
| Class Va | Single RNA genome | Rhabdoviruses Paramyxoviruses |
Vesicular stomatitis virus \VSV) and, rabies virus Mumps virus Sendai virus |
| Class Vb | Segmented RNA genome |
Orthomyxovirus Bunyaviruses Bunyawera viruses | Influenza virus Arenaviruses Lassa virus |
| Class VI | RNA→ DNA→ mRNA | Retroviruses |
Rous sarcoma virus (RSV) Mouse leukemia virus (MLV) |