classification of viruses

This is the baltimore classification------------

Virus classification

DNA viruses

• Group I: viruses possess double-stranded DNA and include such virus families as Herpesviridae (examples like HSV1 (oral herpes), HSV2 (genital herpes), VZV (chickenpox), EBV (Epstein-Barr virus), CMV (Cytomegalovirus)), Poxviridae (smallpox) and many tailed bacteriophages. The mimivirus was also placed into this group.
• Group II: viruses possess single-stranded DNA and include such virus families as Parvoviridae and the important bacteriophage M13.

Virus Family	Virus Genus	Virion- naked/ enveloped	Capsid Symmetry	Type of nucleic acid
1.Adenoviridae	Adenovirus	Naked	Icosahedral	ds
2.Papovaviridae	Papillomavirus	Naked	Icosahedral	ds circular
3.Parvoviridae	B 19 virus	Naked	Icosahedral	ss
4.Herpesviridae	Herpes Simplex Virus, Varicella zoster virus, Cytomegalovirus, Epstein Barr virus	Enveloped	Icosahedral	ds
5.Poxviridae	Small pox virus, Vaccinia virus	Complex coats	Complex	ds
6.Hepadnaviridae	Hepatitis B virus	Enveloped	Icosahedral	ds circular
7.Polyomaviridae	Polyoma virus (progressive multifocal leucoencephalopathy)	?	?	ds

[edit] RNA viruses

For more details on this topic, see RNA virus.

• Group III: viruses possess double-stranded RNA genomes, e.g. rotavirus. These genomes are always segmented.
• Group IV: viruses possess positive-sense single-stranded RNA genomes. Many well known viruses are found in this group, including the picornaviruses (which is a family of viruses that includes well-known viruses like Hepatitis A virus, enteroviruses, rhinoviruses, poliovirus, and foot-and-mouth virus), SARS virus, hepatitis C virus, yellow fever virus, and rubella virus.
• Group V: viruses possess negative-sense single-stranded RNA genomes. The deadly Ebola and Marburg viruses are well known members of this group, along with influenza virus, measles, mumps and rabies.

Virus Family	Virus Genera	Virion- naked/ enveloped	Capsid Symmetry	Type of nucleic acid
1.Reoviridae	Reovirus, Rotavirus	Naked	Icosahedral	ds
2.Picornaviridae	Enterovirus, Rhinovirus, Hepatovirus, Cardiovirus, Aphthovirus, Parechovirus, Erbovirus, Kobuvirus, Teschovirus	Naked	Icosahedral	ss
3.Caliciviridae	Norwalk virus, Hepatitis E virus	Naked	Icosahedral	ss
4.Togaviridae	Rubella virus	Enveloped	Icosahedral	ss
5.Arenaviridae	Lymphocytic choriomeningitis virus	Enveloped	Complex	ss
6.Retroviridae	HIV-1, HIV-2, HTLV-I	Enveloped	Complex	ss
7.Flaviviridae	Dengue virus, Hepatitis C virus, Yellow fever virus	Enveloped	Complex	ss
8.Orthomyxoviridae	Influenzavirus A, Influenzavirus B, Influenzavirus C, Isavirus, Thogotovirus	Enveloped	Helical	ss
9.Paramyxoviridae	Measles virus, Mumps virus, Respiratory syncytial virus	Enveloped	Helical	ss
10.Bunyaviridae	California encephalitis virus, Hantavirus	Enveloped	Helical	ss
11.Rhabdoviridae	Rabies virus	Enveloped	Helical	ss
12.Filoviridae	Ebola virus, Marburg virus	Enveloped	Helical	ss
13.Coronaviridae	Corona virus	Enveloped	Complex	ss
14.Astroviridae	Astrovirus	Naked	Icosahedral	ss
15.Bornaviridae	Borna disease virus	Enveloped	Helical	ss

[edit] Reverse transcribing viruses

For more details on this topic, see Reverse transcribing virus.

• Group VI: viruses possess single-stranded RNA genomes and replicate using reverse transcriptase. The retroviruses are included in this group, of which HIV is a member.
• Group VII: viruses possess double-stranded DNA genomes and replicate using reverse transcriptase. The hepatitis B virus can be found in this group.