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Transcript of Session 1202: Basic Aeroallergen Course Fungal Spore ... · PDF fileSession 1202: Basic...
![Page 1: Session 1202: Basic Aeroallergen Course Fungal Spore ... · PDF fileSession 1202: Basic Aeroallergen Course Fungal Spore Morphology Estelle Levetin, PhD](https://reader036.fdocuments.us/reader036/viewer/2022081323/5a9d699d7f8b9abd058cd891/html5/thumbnails/1.jpg)
Session 1202: Basic Aeroallergen Course
Fungal Spore Morphology
Estelle Levetin, PhD
![Page 2: Session 1202: Basic Aeroallergen Course Fungal Spore ... · PDF fileSession 1202: Basic Aeroallergen Course Fungal Spore Morphology Estelle Levetin, PhD](https://reader036.fdocuments.us/reader036/viewer/2022081323/5a9d699d7f8b9abd058cd891/html5/thumbnails/2.jpg)
Disclosure
• No conflicts to disclose
![Page 3: Session 1202: Basic Aeroallergen Course Fungal Spore ... · PDF fileSession 1202: Basic Aeroallergen Course Fungal Spore Morphology Estelle Levetin, PhD](https://reader036.fdocuments.us/reader036/viewer/2022081323/5a9d699d7f8b9abd058cd891/html5/thumbnails/3.jpg)
Fungal Spore Characteristics
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Characteristics
• Spore size
• Spore shape
• Number of cells
• Attachment Scars
• Wall characteristics
• Spore color
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Spore Size, Shape, and Septation
• SIZE: 2mm to 100 mm
• SHAPE: Globose, elliptical, fusiform, asymmetric, lemon-shaped, barrel-shaped, curved
• SEPTATION: Non-septate (one cell), single septum, transverse septa, transverse and longitudinal septa, random septa, pseudoseptate
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Other Characteristics
• ATTACHMENTS: Attachment scars, attachment pegs
• APPENDAGES
• WALL CHARACTERISTICS: Smooth, granular, reticulate, spines, warts, wall thickness
• COLOR: Hyaline (colorless) to deeply pigmented
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Globose Barrel-shaped Non-septate Random septa
Lemon-shaped Club-shaped Transverse septa Attachment scars
Elliptical Curved Transverse and
Longitudinal septa
Ornaments: spines
Asymmetric and germ
pore
Cylindrical Pseudoseptate Appendages
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Spore color
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Asexual Spores
Also known as Deuteromycetes,
Fungi Imperfecti (imperfect fungi),
or Mitospores
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Asexual Spores
• Typically the most abundant spores in the atmosphere
• Conidia often formed on specialized hyphae called conidiophores
• Asexual stage of ascomycetes
• Look for attachment scars where the spores were attached to the conidiophore or to each other
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Cladosporium
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Note the septum
Cladosporium
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Several species of Cladosporium
are common in the atmosphere
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Note the prominent attachment
scars on Cladosporium conidia
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Alternaria
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Alternaria
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Curvularia
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Curvularia
Nigrospora
Drechslera
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Drechslera-type spores
• Several genera of
fungi have similar
cylindrical spores
– Drechslera
– Bipolaris
– Exserohilum
– Helminthosporium
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Drechslera-type spores
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Pithomyces
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Note the colorless attachment at
the base of Pithomyces spores
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Pithomyces in culture
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Epicoccum
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Epicoccum spore cluster (sporodochium)
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Penicillium species
• Produce distinctive
conidiophores (spore
bearing structures)
• Spores are usually
spherical to oval and
form in chains
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Aspergillus species • Produce distinctive
conidiophores (spore
bearing structures)
• Spores are usually
spherical to oval and
form in chains
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Penicillium-Aspergillus type spores
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Penicillium-Aspergillus type spores
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Aspergillus niger in culture Aspergillus niger spores
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Fusarium
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Botrytis
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Oidium
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Other Asexual Spores on the
NAB Count sheet
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Cercospora
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Nigrospora
Nigrospora Culture Air Sample
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Periconia
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Polythrincium Peronospora
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Stemphylium
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Torula
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Other Asexual Spores NOT on
the NAB Count Sheet
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Spegazzinia
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Tetraploa
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Pestalotiopsis
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Stachybotrys
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Division Ascomycota
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Eight ascospores are produced in each ascus
without any attachment scars
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Ascospores are sometimes found in
groups of eight in air samples
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*Leptosphaeria ascospores
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*Chaetomium ascospores
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*Pleospora
ascospores
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Diatrypella ascospores
(*Family Diatrypaceae)
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Phaeosphaeria annulata
Bright field Phase contrast
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Sporomiella ascospores
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Venturia ascospores
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Paraphaeosphaeria ascospore
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Leptosphaerulina ascospore
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Various ascospores
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Many ascospores on a rainy day
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Division
Basidiomycota
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Basidiospore
Basidium
Attachment
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*Ganoderma basidiospores
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*Agrocybe-type
*Coprinus-type
Other basidiospores that are easy to recognize
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Coprinus and Ganoderma basidiospores
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Psathyrella Psathyrella velutina
Russula
Stropharia
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Boletus
Thelephora
Galerina Chlorophylum
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Lycoperdon Calvatia
Pisolithus Scleroderma
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Mixed Basidiospores
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Rust spores: Puccinia
Puccinia uredospores Puccinia teliospores
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Smut Spores
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Smut Spores
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Myxomycete (slime mold) spores
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Other slime mold spores