Fungus viruses, often known as 'Mycoviruses,' infect a wide range of medically and commercially significant fungi, yet they rarely cause symptoms. In the majority of cases, Mycoviruses have double-stranded RNA (dsRNA) genomes and isometric particles, although about 30% have positive-sense, single-stranded RNA (+ssRNA) genomes. True Mycoviruses can infect and disseminate to other fungi that are healthy. Many double-stranded RNA elements identified in fungi do not fit this description, and in these cases, they are referred to be virus-like particles, or VLPs.
Fungus-caused diseases include: