Zygomycetes: Practice

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Biology

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30 Terms

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Three defining characteristics of zygomycetes
aseptate hyphae, sexual zygospores, devastating in immunocompromised
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Zygomycetes infecting immunocompromised is called...
Zygomycosis/Mucormycosis
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Three characteristics of zygomycosis/mucormycosis
Rare, severe, fatal
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Zygomycosis/Mucormycosis 6 Step Infection Process
Inhalation, spore replication, angioinvasion, necrosis, extensive necrosis, dissemination
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5 Zygomycetes that can cause zygomycosis/mucormycosis
Rhizopus, Mucor, Rhizomucor, Absidia/Lichtheimia, and Cunninghamella
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Columnella
Dome-like structure at tip of sporangiophore
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Apophysis
Swelling of sporangiophore right below columnella
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Sporangiophore
Specialized hyphae that holds the sporangium
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Sporangium
Sac-like structure that contains asexual endogenous conidia called sporangiospores
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Stolon
Hyphae from which rhizoids and sporangiophores can arise
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Rhizopus Hyphae
Aseptate and branch at right angles in vivo; rhizoids and stolon present
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Rhizopus sporangiophores
brown and unbranched
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Rhizopus sporangium
Round
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Rhizopus Apophysis; Columnella
Non-prominent; spherical
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Rhizopus zygospores
present
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Mucor Hyphae
Broad, aseptate or barely septate; rhizoids absent
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Mucor sporangium
Round like lollipop head
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Mucor zygospores
present
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Mucor sporangiophores
hyaline and branched or unbranched lollipop stick
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Rhizomucor hyphae
Broad, aseptate or barely septate; rhizoids rudimentary on stolon between sporangiophores
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Rhizomucor sporangium
Brown and round
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Rhizomucor columnella
Prominent and spherical to pyriform
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Rhizomucor sporangiophores
Irregularly branched
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Rhizomucor zygospores
If present round to slightly compress, brown to black
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Absidia/Lichtheimia sporangium
Pyriform
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Absidia/Lichtheimia hyphae
Only contain septa just below sporangium on the sporangiophore, rhizoids between sporangiophores
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Absidia/Lichtheimia sporangiophores
branching and arise in groups of 2-5
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Absidia/Lichtheimia columnella and apophysis
cone shaped; funnel-shaped
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Cunninghamella sporangiosles
Terminal vesicle contain sporangiosles protrusions that contain sporangiospores
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Cunninghamella sporangiophores
Erect and form short lateral branches