Mycology Introduction Flashcards
sexual reproduction fungal form
teleomorph
asexual fungal form
anamorph
what is a mitosporic fungi
term for fungi that lack meiotic stage
what is saprophytic fungi
live and feed on dead and decaying organisms
what is parasitic fungi
live on animals
cause disease
what are mutualistic fungi
both fungi and other organism benefit from relationship
major forms
branching hyphae (molds)
unicellular yeasts
agar specific for fungi
sabouraud dextrose agar
hyphae cell walls
mainly carbohydrate components
chitin macromolecules with cellulose cross linkages
yeast cell walls
protein complexed with polysaccharides
lipid compounds
what are the spore bearing structures
aerial hyphae
what is asexual division in most yeasts
budding
main difference between pseudohyphase and mycelium (true hyphae)
true hyphae (mycelium) grow on culture media
arthroconidia (arthrospores)
spores formed and subsequently released during process of hyphal fragmentation
can be successive or with intervening empty cells (every other is a spore)
blastoconidia (basltospores)
conidia produced by budding from a mother cell, hyphae, or pseudohyphae
chlamydoconidia (chlamydospores)
thick walled resistant spores, contain storage products
formed in unfavorable environmental conditions
macroconidia
large multicelled conidia
produced by dermatophytes in culture
microconidia
small conidia
produced by certain dermatophytes
phialoconidia
conidia produced from phialides
conidia eventually separate from structure and form colonies
aspergillus philaides arise from a vesicle
sporangiospores
spores formed by zygomycetes
released when a mature sporangium ruptures
colony textures
cotton
velvety
granular
glabrous
fungal topography
rugose
umbonate
verrucose
hyphae strucutre
favic chandeliers
racquet hyphae
spiral hyphae
predispose to fungal invasion
immunosuppression
prolonged antibiotic therapy
immunological defects
immaturity, aging, malnutrition
heavy exposure to fungal spores
traumatized tissues
peristent moisture
neoplasia
mechanisms of fungal disease
tissue invasion – mycosis
toxin production – mycotoxicosis
induction of hypersensitivity
diagnosis of fungal diseases
10% KOH
SDA
calcofluor white
india ink or nigrrosin
gram or methylene blue stain
FAT
PAS
methenamine silver stain and counterstain
wright or giemsa stain
