Pathogenic RNA Viruses.ppt

 

Only infective agents that store genetic information in RNA molecules
RNA viruses are categorized by:
Their genomic structure
Presence of an envelope
Size and shape of their capsid
Four types of RNA viruses
Positive single-stranded RNA (+ssRNA)
Retroviruses (+ssRNA viruses that convert their genome to DNA)
Negative single-stranded RNA (-ssRNA)
Double-stranded RNA (dsRNA)

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