Ascomycota, Pezizomycotina, Hypocreales, Nectriaceae. Genus: FUSARIUM
Fusarium suttonianum (Sandoval-Denis & Crous) O’Donnell et al.
member of F. solani species complex
Common synonyms
Neocosmospora suttoniana Sandoval-Denis & Crous
Latest update: 24 October 2024
Colony characteristics
Colonies (PDA, 7 d, 24 °C) reaching 85 mm diam, olivaceous buff, flat, felty to velvety, with radial patches of white aerial mycelium; margins regular; reverse pale greenish yellow; pale sulphur yellow diffusible pigments exuded into the agar.
Microscopy
Hyphae hyaline. Conidiophores inserted on creeping hyphae or arranged in sporodochia. Conidiophores erect, up to 250 μm high, simple or with 1-3 lateral branches. Phialides smooth- and thin-walled, subulate to subcylindrical, (8-)20-60 × 2.5-3.5 μm, with single, minute collarette. Conidia hyaline, obovoidal to clavate, straight or curved, smooth- and thin-walled, with 0-3 transverse septa, 7-21 × 3-6 μm, mostly aggregating in heads. Sporodochia formed on carnation leaves, cream to rosaceous, consisting of densely packed conidiophores measuring 40-60 μm. Sporodochial conidia falcate, with papillate basal cell, 5-6-septate, hyaline, thick- and smooth-walled, 6-septate conidia up to 75-85 × 7-8 μm. Chlamydospores abundant, thick-walled, coarsely roughened, sub)spherical, 5-9 μm diam, solitary or in chains, terminal or intercalary. Sexual state unknown.
Pathogenicity
RG-1, BSL-1. The species was originally described from clinical samples (Sandoval-Denis & Crous, 2018). Goggin et al. (2023) reported a chronic infection in a patient with STAT3 inherited immunodeficiency.
Species complex
Clinically relevant members of the F. solani complex are: F. falciforme, F. keratoplasticum, F. metavorans, F. petroliphilum, F. pseudensiforme, F. solani and F. suttonianum.
References
Sandoval-Denis & Crous (2018).
Nomenclature
Neocosmospora suttoniana Sandoval-Denis & Crous – Persoonia 41: 123, 2017 ≡ Fusarium suttonianum (Sandoval-Denis & Crous) O’Donnell, Geiser & Aoki, in Aoki, Geiser, Kasson & O’Donnell – Index Fungorum 440: 4, 2020.