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Pathology of Picornavirus

Infection (Picornaviridae)

Dr Sampurna Roy MD


The picornaviruses are characterized by nonenveloped virions with icosahedral capsids 20 to 30 nm in diameter.

They contain a single-stranded RNA genome.

Two genera of picornaviruses that commonly infect humans are the enteroviruses, which have at least 67 recognized immunologic types, and the rhinoviruses, with more than 100 types infecting the human.

Enteroviruses parasitise the enteric tract and the rhinoviruses infect the nasal mucosa.


The following are the important Enteroviruses that have been subdivided on the basis of antigenic relationships and differences in host range:

- Polioviruses

- Coxsackieviruses groups A and B, &

- Echoviruses




Dr Sampurna Roy  MD

Consultant  Histopathologist (Kolkata - India)






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