Plant and Fungal Virology
The epidemiology of plant virus diseases concerns the cyclical development of virus diseases within plant populations in time and space. Tobacco mosaic virus (TMV) is a positive-sense single stranded RNA virus that infects a wide range of plants, especially tobacco and other members of the family Solanaceae. In the viral life cycle, viral entry is the emergent stage of infection, as the virus invades with the host cell and intrudes viral material into the cell. Mycoviruses are viral agents that infect fungi. They have double-stranded RNA genomes and isometric particles. To be a true mycovirus, they should have a positive sense and single-stranded RNA genomes and must be able to be transmit infections.