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Flashcards in Fungi Deck (12):
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Ergosterol

target for anti-fungal drugs.
-Chitin: stain with calcium chelating agents like "calcofluor white" for identification. Does not use gram stain.
- in the cell membrane, it is filled with fluid to stop growth of fungi

1

molds

vegetative growth
-coenocytic: no division, have nuclei
-septate: division and nuclei in cell
-Hyphae: long filaments, is mostly aerobic

2

Yeast

reproduce by budding
failure to detach is a pseudohyphae
oval/spherical shaped, anaerobic
"Candida albicans" attach as a yeast, but invades deeper tissues by pseudohyphae

3

Examples of yeasts

Thrush- mouth infection
saccharomyces- yeast ethanol for wine; CO2 for leavening bread dough

4

Dimorphic Fungi

low temp-mold, high temp-yeast (Dimorphism)
-not infectious from person to person, mold form is spread through spores in the air
-Histoplasma capsulatum": yeast, less than 35 degrees is mold

5

Sporothrix aka rose gardner's disease

systematic and stays in tissues
fungal spores goes into wound
-Lymphangitis- arms and leg causes more ulcers to develop

6

nutrition

less nutritionally demanding, grows better at extreme conditions, mostly at aerobic, best between 25-30

7

Fungi diseases are called

mycoses and have superficial, cutaneous, and systemic types

8

superficial mycoses

-infection along surface of hair shafts, outer layer of skin
- black and white piedra (scalp), looks like dandruff
-Malassezia furfur- a yeast

9

cutaneous mycoses

deeper layer of epidermis
-athlete's foot/ringworm
-caused dermatophytes ( degraded keratin/mold)
-causes tineas

10

systemic mycoses

deep tissues and organs
-caused are primary dimorphic pathogens (Histoplasma capsulatus)
OR opportunistic pathogens ( yeast and mold)- "Aspergillosis"

11

Candiasis

-systemic infection
-Candida albicans causes thrush in newborns and black tongue