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Microascus brevicaulis is a microfungus in the Ascomycota. [ 1 ] [ 2 ] It is the teleomorph form of Scopulariopsis brevicaulis. Microascus brevicaulis occurs world-wide as a saprotroph in soil, a common agent of biodeterioration, an irregular plant pathogen, and an occasional agent of human nail infection.
Scopulariopsis brevicaulis . Scopulariopsis is a genus of anamorphic fungi that are saprobic and pathogenic to animals. [1] The widespread genus contains 22 species. [2] Scopulariopsis belongs to the group Hyphomycetes. These species are commonly found in soil, decaying wood, and various other plant and animal products.
Other Scopulariopsis species have been associated with nail infection and keratitis (S. brevicaulis), and brain abscess and hypersensitivity pneumonitis (S. brumptii). [6] A case of disseminated infection caused by Scopulariopsis species in a 17-year old patient with chronic myelogenous leukemia was described in 1987. [5]
Magnified view of Scopulariopsis brevicaulis, its annellides, and the ring-shaped annellations emanating from them A type of blastic conidiogenesis. The conidiogenous cell (also called an annellide) produces a basipetal sequence of conidia called annelloconidia or annellospores. The distal end is marked by ring-shaped bands called annellations.
It was introduced by Luttrell (1951) to accommodate genus Microascus which was originally placed in family Ophiostomataceae (Nannfeldt 1932, [3]) or Eurotiaceae in Eunotiales order, (Moreau and Moreau 1953; [4] Emmons and Dodge 1931; [5] Doguet 1957). [6]
Microascaceae species have spherical to irregularly shaped, darkly colored fruit bodies.They are usually hairy and rarely smooth. The smooth spores are reddish brown to copper colored, one-celled, and have a germ pore at one or both ends.
The Microascales are characterized by a lack of stroma, black perithecial ascomata with long necks or rarely with cleistothecial ascomata that lack paraphyses.They have roughly spherical and short-lived asci that develop singly or in chains.
Scopulariopsis leaf spot Scopulariopsis brevicaulis: Seedling or seed rot Aspergillus flavus Trichothecium roseum. Stemphylium blight Stemphylium sarciniforme: Trichoderma foot rot Trichoderma harzianum: Verticillium wilt Verticillium albo-atrum Verticillium dahliae. Wet root rot: Rhizoctonia solani