Poliomyelitis belongs to which class of infectious microorganisms?

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Poliomyelitis is caused by a virus, which means it belongs to the class of viruses. Viruses are tiny infectious particles that can only replicate inside living cells; they are not cellular organisms themselves and carry either RNA or DNA but lack the full machinery to reproduce on their own. This sets them apart from other infectious groups.

Bacteria are cellular organisms with their own metabolism and can be grown on nutrient media without a host. Fungi are eukaryotic organisms with cell walls and complex growth, and protozoa are single-celled eukaryotes. Poliovirus fits none of those categories because it’s a virus that must hijack a host cell’s machinery to multiply. In fact, poliovirus is a small, non-enveloped RNA virus in the enterovirus group, illustrating why poliomyelitis is classified as a viral infection.