Fusarium suttonianum

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. falciformeF. keratoplasticumF. metavoransF. petroliphilumF. pseudensiformeF. 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.