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Mycology
Microbiology
Question | Answer |
---|---|
Dimorphic fungi | Histoplasma capsulatum; Blastomyces dermatiditis; Sporothrix schenckii; Coccidioides immitis (also C. posadasii); Paracoccidioides brasiliensis; Penicillium marneffei |
Yeasts | Candida albicans; Candida spp; Torulopsis glabrata; Cryptococcus neoformans; Pneumocystsis carinii |
Molds | Zygomycetes (nonseptate): Mucor, Rhizopus; Dermatophytic agents: Trichophyton, Malasezzia; Dematiaceous fungi: Alternaria, Cladosporium; Opportunistic fungi: Aspergillus, PenicilliumDimorphic fungi |
Fungi mechanismsof dz | metabolic toxicity (ingest); hypersensitivity; host colonization with subsequent disease |
Opportunistic mycoses | Candida spp; Cryptococcus neoformans; Aspergillus spp; Zygomycetes; Fusarium et al; Pneumocystis jiroveci |
Infect immunocompetent AND immunocompromised | Cryptococcus neoformans |
Most common cause of meningitis in HIV & PG | Cryptococcus neoformans |
Zygomycetes (nonseptate) | Mucor, Rhizopus |
Dermatophytic agents | Trichophyton, Malasezzia |
Dematiaceous fungi | Alternaria, Cladosporium |
Opportunistic fungi | Aspergillus, Penicillium |
Dermatophytic agents | Trichophyton, Malasezzia |
nail infxn example of what level of tissue invasion by fungi? | Cutaneous |
Which dimorphic fungi to suspect in immunocompetent people? | Blasto |
Superficial mycoses causing hypigmentation | M. furfur |
Ringworm | dermatophytes (2 phytons & microsporum) |
More common in tropical | M furfur; subcutaneous |
Immunocompromised pt | Histo, coccidioides, Candida, Aspergillus (direct tissue invasion) |
Olive oil; tinea versicolor; spaghetti & meatballs; pseudohyphae | M. furfur |
Systemic fungal infxn originate usually in the ____ | Lung (but can disseminate) |
colonizes human airway | Aspergillus (in immunocomp pt can cause direct tissue invasion) |
conidia bind to human fibrinogen; problems for neutropenic pt | Aspergillus |
most common opportunistic fungi | Candida spp |
invades deep tissues of multiple organs | Candida spp |
can make pseudohyphae | M. furfur; candida spp |
Encapsulated yeast; CNS; meningitis | Cryptococcus neoformans |
Example of nonpigmented (hyaline) mold | fusarium |
Diagnosis by bronchial lavage (OR); silver stain | pneumocystis |
subcutaneous | Sporo; Chromoblastomycosis; Mycetoma |
lesions develop along lymphatic | sporo |
lesions often pathognomonic | systemic mycoses |