Mycology: morphology

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General fungal forms
- filamentous
- branching
Agar used

Sabouraud agar
Fungal cultures are left for _____ @ ____C
- 1-4 wks
- 25C
Mycelium-

Mass of hyphae
Dimorphic-

having yeast form and mycelial form
Conidia-

spores
Arthroconidia/arthrospores-

Spores from hyphal fragmentation
Geophilic-

soil is natural habitat
Zoophilic-

Animals are the source
Yeast form @ ___C and Mycelial form @ ___C
Ringworm fungi-

Dermatomycoses
Yeast and yeat like fungi (2)
- Candida
- Malassezia
SQ Mycoses-

sporotrichosis
Systemic Mycoses (5):
- Aspergillosis
- Blastomycosis
- Histoplasmosis
- Coccidoidomycosis
- zygomycosis
Antifungal that is rarely used d/t renal damage

Amphotericin B
Nystatin is a _______, used for _____
- Narrow spectrum drug
- candida
PO Ringworm drug:

Griseofulvin
Ketoconazole is used....

systemically a variety of fungal infections
Used to disinfect ares contaminated w/ dermatophytes (3):
- Sodium hypochlorite
- Formalin
- Enilconazole
Topical Tx for dermatophytes (2):
- Lime Sulfur
- Imidazole/ketoconazole
- Natamycin (horses)
Systemis Tc for dermatophytes (3):
- Griseofulvin
- itraconazole
- ketoconazole
Clinical Signs of ringworm:
- alopecia
- erythema
- crusts
Ringworm immunity is associated w/

DTH
Pathogenesis of dermatomycosis
- Hyphae in stratum corneum, hair roots
- Keratinases, elastases and proteases -> hair break
- Inflammation -> erythema
- fungus moves to next follicle
- circular lesion
M. canis infects:
- Dogs
- Cats
T Verrucosum infects:

cattle
T. Equinum infects:

horses
T Mentagrophytes infects:
- Dogs
- Horses
- Cats
Appearance of M. canis

spindle shapes macroconidia
Appearance of M. gypseum

Boat shaped macroconidia
Appearance of T. mentagrophytes:

Cigar shaped macroconidium + numerous Microconidia
Look for ____ to Dx w/ a SS

Arthrospores
Look for ___ to Dx w/ a culture

Macrocinidia
"package of spores"=

Macroconidia
Trichophyton verrucosum-

ringworn Vx for cattle

Author

HLW

65145

Card Set

Mycology: morphology

Description

Mycology: morphology

Updated

2011-02-09T03:19:21Z

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