mycology opportunistic molds
DESCRIPTION
Please click audio icon to hear Carol’s narration. Mycology Opportunistic Molds. Division of Medical Technology Carol Larson MSEd, MT(ASCP). Click icon for audio. Basic Characteristics. Rapid growers (4-5 days) Found in soil (saprobic) Conidia are airborne Opportunistic pathogens - PowerPoint PPT PresentationTRANSCRIPT
MycologyOpportunistic Molds
Division of Medical Technology
Carol Larson MSEd, MT(ASCP)
Please click audio iconto hear Carol’s narration
Basic Characteristics
• Rapid growers (4-5 days)
• Found in soil (saprobic)
• Conidia are airborne
• Opportunistic pathogens
• Treatment
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Opportunistic Mold Classification
• Aseptate (sparsely septate) / hyaline
• Septate / dematiaceous
• Septate / hyaline
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Zygomycetes
• Lid lifters
• Sporangiospores
• Rhizoids
Aseptate (sparsely septate) hyaline hyphaeClick icon for audio
Clinical Significance
• Causes Zygomycosis (Mucormycosis, Phycomycosis)
• Predisposition– Diabetics– Malnutrition– Immunosuppressed– Prolonged antibiotic therapy
• Pathogenesis– Nasal sinuses– Migrate to brain and meninges
Aseptate (sparsely septate) hyaline hyphaeClick icon for audio
Absidia species
• Internodal rhizoids
Aseptate (sparsely septate) hyaline hyphaeClick icon for audio
Mucor species
• No rhizoids
Aseptate (sparsely septate) hyaline hyphaeClick icon for audio
Rhizopus species
• Nodal rhizoids
Aseptate (sparsely septate) hyaline hyphaeClick icon for audio
In Review …
• Aseptate (sparsely septate) hyaline hyphae
• Zygomycetes– Lid lifters, sporangiospores– Absidia – internodal rhizoids– Mucor – no rhizoids– Rhizopus – nodal rhizoids
• Zygomycosis
Aseptate (sparsely septate) hyaline hyphaeClick icon for audio
Opportunistic Mold Classification
• Aseptate (sparsely septate) / hyaline
• Septate / dematiaceous
• Septate / hyaline
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Alternaria species
• Colony morphology:
• Microscopic morphology:
Septate / dematiaceous hyphaeClick icon for audio
Cladosporium species
• Colony morphology:
• Microscopic morphology:
Septate / dematiaceous hyphaeClick icon for audio
In Review …
• Septate, dematiaceous hyphae
• Alternaria species
• Cladosporium species
• Generally nonpathogenic
Septate / dematiaceous hyphaeClick icon for audio
Opportunistic Mold Classification
• Aseptate (sparsely septate) / hyaline
• Septate / dematiaceous
• Septate / hyaline
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Aspergillus species
• Causes Aspergillosis
• Predisposed– Debilitated & immunocompromised
• Pathogenesis– Inhale conidia– Pulmonary disease– Systemic
Septate / hyaline hyphaeClick icon for audio
Aspergillus fumigatus
• Colony morphology:
• Microscopic morphology:
Septate / hyaline hyphaeClick icon for audio
Aspergillus niger
• Colony morphology:
• Microscopic morphology:
Septate / hyaline hyphaeClick icon for audio
Aspergillus flavus
• Colony morphology:
• Microscopic morphology:
Septate / hyaline hyphaeClick icon for audio
Aspergillus species
• Colony morphology:– Velvety, white, green
yellow, cinnamon brown, reverse varies
• Microscopic morphology:– Single or double row of
phialides covering entire vesicle
Septate / hyaline hyphaeClick icon for audio
In Review …
• Aspergillus species– A. fumigatus– A. niger– A. flavus– Many others
• Aspergillosis
Septate / hyaline hyphaeClick icon for audio
Other Opportunistic Molds
• Penicillium species
• Paecilomyces species
• Fusarium species
• Sepedonium species
Septate / hyaline hyphaeClick icon for audio
Penicillium species
• Colony morphology:
• Microscopic morphology:
Septate / hyaline hyphaeClick icon for audio
Paecilomyces species
• Colony morphology:
• Microscopic morphology:
Septate / hyaline hyphaeClick icon for audio
Fusarium species
• Colony morphology:
• Microscopic morphology:
Septate / hyaline hyphaeClick icon for audio
Sepedonium species
• Colony morphology:
• Microscopic morphology:
Septate / hyaline hyphaeClick icon for audio
In Review …
• Septate hyaline hyphae
• Opportunistic pathogens– Aspergillus– Fusarium
• Lab contaminants– Penicillium– Paecilomyces– Sepedonium
Septate / hyaline hyphaeClick icon for audio
In Summary …
• Key characteristics
• Identification methods– Colony morphology– Microscopic morphology
• Clinically significant opportunistic molds– Zygomycetes– Aspergillus fumigatus, A. niger, A. flavus– Fusarium species
Opportunistic MoldsClick icon for audio
Who am I?
Aspergillus fumigatus
Potato Dextrose Agar LPCB Stain of Slide Culture
Who am I?
Potato Dextrose Agar LPCB Stain of Slide Culture
Rhizopus species
Who am I?
Fusarium species
Potato Dextrose Agar LPCB Stain of Slide Culture
Who am I?
Penicillium species
Potato Dextrose Agar LPCB Stain of Slide Culture