Review Article

Smaller Fleas: Viruses of Microorganisms

Table 4

Notable viruses of yeasts, molds, and pathogenic fungi.

Virus name(Order) family [subfamily] Type25Genome type (segments), morphology, size, GenBank Host type
Genusaccession number or reference (if available)

Saccharomyces cerevisiae
Virus L-A (L1)
Totiviridae
Totivirus
YesdsRNA (1), icosahedral, 4,579 nt (NC_003745)Yeast

Saccharomyces cerevisiae
Ty5 virus
Pseudoviridae
Hemivirus
YesssRNA (+) (1), icosahedral/sphericalYeast

Saccharomyces cerevisiae
Ty1 virus
Pseudoviridae
Pseudovirus
YesssRNA (+) (1), icosahedral/sphericalYeast

Saccharomyces cerevisiae
Ty3 virus
Metaviridae
Metavirus
YesssRNA (+) (1), uncertainYeast

Saccharomyces 20S RNA narnavirusNarnaviridae
Narnavirus
YesssRNA (+) (1), unencapsidated, 2,514 nt (NC_004051)Yeast

Aspergillus ochrace us virusPartitiviridae
Partitivirus
dsRNA (1), icosahedralMold26

Penicillium chrysogenum virusChrysoviridae
Chrysovirus
YesdsRNA (4), icosahedral, 12,640 nt (NC_007542, NC_007539, NC_007541, NC_007540)Mold

Fusarium solani
Virus 1 (a.k.a., mycovirus FusoV)
Partitiviridae
Partitivirus
dsRNA (2), icosahedral, 3,090 nt (NC_003886, NC_003885)Human pathogen

Tolypocladium cylindrosporum
virus 1
Totiviridae
Totivirus
dsRNA (1), icosahedral, 5,196 nt (NC_014823)Mosquito pathogen

Helminthosporium victoriae
Virus 190S
Totiviridae
Victorivirus
YesdsRNA (1), icosahedral, 5,179 nt (NC_003607)Plant pathogen

Cryphonectria hypovirus 1Hypoviridae
Hypovirus
YesdsRNA (1), pleomorphic cytoplasmic vesicles, 12,734 nt (NC_001492)Plant pathogen

Helicobasidium mompa endornavirus 1Endornaviridae
Endornavirus
dsRNA (1), unencapsidated, 16,614 nt (NC_013447)Plant pathogen

Mycoreovirus 1 (of Cryphonectria parasitica)Reoviridae [Spinareovirinae]
Mycoreovirus
YesdsRNA (11), spherical, double shelled, 23,433 nt (NC_010743, NC_010744, NC_010745)Plant pathogen

Rosellinia necatrix
Megabirnavirus 1
Megabirnaviridae
Megabirnavirus
YesdsRNA (2), spherical27, 16,111 nt [110]Plant pathogen

Rosellinia necatrix
Quadrivirus 1
UnassigneddsRNA (4), spherical, 17,078 nt (NC_016757, NC_016759, NC_016760, NC_016758) [111]Plant pathogen

Sclerotinia sclerotiorum
Hypovirulence-associated DNA virus 1
Unassigned [Geminiviridae-like]ssDNA (1), spherical or icosahedral, 2166 nt [112]Plant pathogen

Sclerotinia sclerotiorum
Debilitation-associated RNA virus
(Tymovirales) Alphaflexiviridae
Sclerodarnavirus
YesssRNA (+) (1), filamentous, 5,470 nt (NC_007415)Plant pathogen

Botrytis
Virus F
(Tymovirales) Gammaflexiviridae
Mycoflexivirus
YesssRNA (+) (1), filamentous, 6,827 nt (NC_002604)Plant pathogen

Botrytis
Virus X
(Tymovirales) Alphaflexiviridae
Botrexvirus
YesssRNA (+) (1), filamentous, 6,966 nt (NC_005132)Plant pathogen

Cryphonectria Mitovirus 1Narnaviridae
Mitovirus
YesssRNA (+) (1), unencapsidatedPlant pathogen

25Viral type species.
26Host is Aspergillus ochraceus.
27Chiba et al. [110, 111] describe the virions as “spherical” but the published electron micrographs are also suggestive of icosahedral.