Index >> Virus Structure and Classification >> Classification of Virus by Casjens and King

Classification of Virus by Casjens and King

The Major groups of virus according to the type of nucleic acid, symmetry presence or absence of an envelope and site of assembly.

I.ssRNA VIRUSES
(A) HELICAL
a.Rigid rods :
Tobacco mosaic virus
Barely stripe mosaic virus
Tobacco rattle virus

b. Flexous rods :
Potato X and Y viruses
Clover yellow mosaic virus.

b. Bacteriophages : R17, fr, f2, MS2,Q

c. Picornaviruses : (animal) -4 sub groups
(i) Human enteroviruses.Poliovirus, coxsackie and ECHO viruses
(ii) Rodent cardioviruses.Encephalomyocaritis virus, Mouse Elberfield virus, Mengovirus
(iii) Rhinoviruses. : Human respiratory infection
(iv) Foot - and mouth disease virus.

(C) ENVELOPED
(i) Spherical : Togavirus -Yellow fever
(ii) Bullet Shaped :Rhabdovirus - rabies
(iii) Spherical or filamentous : Paramyxovirus -measles Myxovirus - influenza
(iv) spherical : Coronavirus -actute upper respiratory tract infections.