Fungus MLS

Epidermophyton floccosum

Athlete's foot (tinea pedis), jock itch (tinea cruris), and other skin disorders

Chrysosporium species

Common contaminant; rarely associated with infections Colony Morphology: Varies, cottony, powdery, or granular; can be flat or raised, usually white, yellow, tan, but can be pink, orange or gray; reverse is white to brown Microscopic: Septate hyphae; one-celled clavate conidia with a rounded apex and broad flattened base. Resemble Blastomyces dermatitidis

Gliocladium species

Pathogenicity: Common contaminant Colony Morphology: Surface is white becoming dark green or pink; reverse is white Microscopic: Similar to Penicillium spp. but conidia clump together to form large clusters or balls

Bipolaris spp.

Septate hyphae dark hyphae and conidia cylindrical-four or five-celled porocondia with truncate hila(points of attachment) in clusters along a bent-knee shaped condiophore bipolar germ tube formation- germ tube from both poles of macroconidia

Candida albicans

Yeast infection, thrush

Cladosporium spp.

dark-colored septate hyphae chains of dark one-to four-celled blastoconidia with a distinct scar at each point of attachment repearedly forking shield cells

Cladophialophora boppii

long, unbranched round blastoconidia

Mucor species

non-septate hyphae, but also a vessel invader -> frontal lobe abscesses in DKA pts.

Acremonium spp.

"Balls of rice" Septate mycelium unbranched tapering conidiophores closely packed balls of sickle- or elliptical shaped cells

Absidia corymbifera

(Lichtheimia corymbifera complex)

Cunninghamella species

- Fast grower--Lid lifter - Aseptate hyphae - One-celled round sporangiola form at the tips of swollen denticles "tooth like denticles"

Alternaria spp.

- SEPTATE - DARK reproductive and hyphae structures - CHAINED poroconidia - HORIZONTAL and VERTICAL SEPTA - CLUB shaped bases with tapered apices

Absidia spp.

A rapidly growing non septate mold produced colonies with a gray surface resembling cotton candy that covered the entire plate. Microscopic examination revealed sporangiophores arising between, not opposite, the rhizoids and producing pear-shaped sporangia.

Curvularia spp.

Bent, knobby condiophore with swollen curved macroconidia due to large central cell.

Beauveria species

Common contaminant; very rarely involved in human infections Colony Morphology: White to cream or pinkish; very fluffy or powdery; reverse is white Microscopic: Hyphae are septate, delicate and narrow. Conidia producing structures exhibit zigzag terminal extensions (sympodial geniculate growth). Conidia are small, round to oval, and form singly on denticles. Resembles the dimorphic mold Sporothrix schenckii

Blastomyces dermatitidis (Blastomycosis)

Endemic in Mississippi and Ohio River valleys Human infection through inhalation Broad based budding yeast

Geotrichum candidum

Flavor enhancer in cheeses - Fungi

Cryptococcus neoformans

Fluconazole (prophylaxis in AIDS patients)

Exophiala dermatitidis

GROWTH at 42C Formerly Wangiella dermatitidis Black yeasty colonies develop velvety mycelium at edge Balls of conidia NITRATE NEGATIVE

Chaetomium species

Several species grow at 42 C are neurotopic and have casued cerebral phaeohyphomycosis

Fonsecaea pedrosoi

Surface is dark green or black covered with silver grey mycelium *most common worldwide cause of chromoblastomycosis*

Aspergillus niger

black conidia Citric acid

Hortaea werneckii

causative agent of Tinea nigra

Cladophialophora carrionii

erect conidiophores bearing branched chains of one-celled, brown blastoconidia

Fusarium

grows on wall boards in houses

Microsporum

infects hair and skin

Aspergillus flavus

produces a potentially lethal poison to animals who eat contaminated grain

Aspergillus fumigatus

septate hyphae with fruiting body; fungus ball, extrinsic asthma, vessel invader

Cladophialophora bantiana

very long, sparsely branching oval blastoconidia; predilection for the central nervous system