STRUCTURE AND MORPHOLOGY OF VIRUSES

Viruses are obligatory intracellular infectious agents of sizes ranging from 20 to 300

nanometere with an absolute dependence on living cells for their replication.

STRUCTURE AND MORPHOLOGY OF VIRUSES

The knowledge of the structure of viruses is important in their identification and

classification into groups. It is also helps us to deduce many important properties of a

particular virus. For instance, the processes of attachment and penetration of virus into

host cell and subsequent maturation and release vary greatly among viruses and is

influenced by the presence or absence of an outer lipid-containing envelope. Enveloped

viruses tend to cause fusion of the host cell at some stage during their entry. Nonenvelope

viruses are more resistant to heat and detergents. These have consequences for

control of viral infection especially disinfection of premises following an outbreak.

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