Enlist plant, animal and human viral diseases with their causative agents
Plant viral diseases
* Plant viruses and viruses that affect plants.
* Like all other viruses, plant viruses are obligate intracellular parasites that do not have the molecular machinery to replicate without a host.
* Plant viruses can be pathogenic to higher plants.
* Most plant viruses are rod-shaped.
* They rarely have an envelope.
* The great majority have an RNA genome, which is usually small and single stranded (ss), but some viruses have double-stranded (ds)RNA, ssDNA or dsDNA genomes.
* To transmit from one plant to another and from one plant cell to another; plant viruses must use strategies that are usually different from animal viruses.
* Plant-to-plant transmission usually involves vectors (such as insects).
* Plant cells are surrounded by solid cell walls, therefore transport through plasmodesmata is the perferred path for virions to move between plant cells.
* The discovery of plant viruses causing disease is often accredited to A. Mayer (1886).
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Animal viral diseases
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