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Opp Moulds Part 2
Mod 1 Lec 3
Mould | Identification |
---|---|
Aspergillus spp. | Rapid growth (3 days), grows well at 45C |
Aspergillus spp. Macro | First white then yellow, green, brown or black |
Aspergillus spp. Micro | Septate hyphae; unbranched conidiophore from "foot cell"; vesicles; phialides cover entire surface (radiate) or only partially (columnar); phialides either uniseriate or biseriate with at metula; conidia in radial chains |
Zygomycetes | Rapid growth; more tissue damage, almost always fatal; "lid lifters", can fill plate in 24 to 48 hours |
Zygomycetes Differentiation | Presence or absence and location of rhizoids; branched or unbranched sproangiophore; size and shape of sproangium |
Mucor spp. Macro | Many don't grow at 37C; rapid growth, fluffy, white becoming grayish brown, reverse white |
Mucor spp. Micro | Aseptate or sparsely septate, broad hyphae; sproangiophores long and branched with terminal sproangia; NO Rhizoids |
Rhizopus spp. Macro | Grow very rapidly, cotton-candy white initially and turn grey to yellowish-brown, reverse white; pathogenic species can grow well at 37C |
Rhizopus spp. Micro | Broad, aseptate hyphae, long unbranched sproangiophores, Rhizoids are produced |
Rhizomucor spp. Macro | Similar to Mucor |
Rhizomucor spp. Micro | Short rhizoids and branched sproangiophores; intermediate to Mucor and Rhizopus |
Absidia spp. Macro | Rapid growth, woolly to cottony, olive to gray colonies, reverse is uncolored |
Absidia spp. Micro | Broad aseptate hyphae, sporangiophores are branched and arise in groups of 2-5; sproangiospores are one-celled and round to oval |
Cunninghamella spp. Micro | Rapidly growing, cottony, white to tannish-gray, reverse is pale |
Cunninghamella spp. Macro | Aseptate or sparsely septate broad hyphae; sporangiophores long and branched; vesicles; sporangiophores are erect and form short lateral branches that terminate in a swollen vesicle |