Animal Viruses

Animal Viruses - Animal viruses can be grouped into six classes on the basis of the relationship between their virion nucleic acids and mRNAs. Viral RNA is called 'plus' RNA and its complementary sequence 'minus' RNA.

(i)Class I - dsRNA viruses

Papovaviruses

Poxviruses

Adenoviruses

Herpesviruses

(ii)Class II - ssDNA viruses

Parvoviruses

(iii)Class III - dsRNA viruses

Reoviruses

(iv)Class IV - Positive strand RNA viruses

(a)Class IVa

Picornaviruses

(b)Class IVb

Togaviruses

(v)Class V -negative strand RNA viruses

(a)Class Va

Rhabdoviruses

Paramyxoviruses

(b)Class Vb

Orthomyxoviruses

Bunyaviruses

Arenaviruses

(vi)Class VI - RNA - DNA viruses

Retroviruses