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Microbiology > Mycology Intro > Flashcards

Mycology Intro Flashcards

1
Q

Yeasts

A

single celled fungi

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2
Q

Molds

A

multi celled fungi

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3
Q

Mycosis

A

fungal infection

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4
Q

Systemic mycosis

A

multi organ infection caused by fungi

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5
Q

Opportunistic mycosis

A

fungal disease that occurs primarily in immunocompromised patients

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6
Q

Dimorphic fungi

A

fungi that can demonstrate both a yeast phase and a mold phase

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7
Q

Saprobe

A

organism capable of living on decaying organic matter (environmental)

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8
Q

Hyphae

A

long branching fungal filaments

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9
Q

Mycelium

A

several hyphae combine to form a meat of growth

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10
Q

Vegetative mycelium

A

the portion of the mycelium that extends into culture medium and is responsible for absorbing water and nutrients

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11
Q

Aerial mycelium

A

the portion of the mycelium that projects above culture medium and is responsible for reproduction

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12
Q

Psuedohyphae

A

a chain of cells formed by budding yeast that resemble true hyphae

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13
Q

Conidia

A

sporelike asexual reproductive structures (only involves division of nucleus and cytoplasm)

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14
Q

Imperfect fungi

A

fungi that undergo asexual reproduction

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15
Q

Blastoconidia

A

budding forms characteristically produced by yeast

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16
Q

Chlamydoconidia

A

formed from cells in hyphae which become thickened and often enlarged

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17
Q

Arthroconidia

A

also formed from cells in hyphae which become enlarged and thickened
on maturity these conidia are released by lysis of adjacent hyphae cells

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18
Q

SAB agar

A

general purpose agar
nutritionally poor medium
mildly selective for fungi due to low pH

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19
Q

Cycloheximide

A

inhibits saprophytic fungi

20
Q

Chloramphenicol

A

inhibits many gram (+) and (-) bacteria

21
Q

Gentamicin

A

inhibits primarily gram (-) bacteria

22
Q

IMA agar

A

used to grow most fungal pathogens

23
Q

Potato dextrose agar

A

used to enhance conidia development and pigment production

24
Q

Bird seen (niger seed) and caffein acid

A

agar used to grow crypto coccus neoformans/gatti which form brown to black colonies due to phenol oxidase activity

25
Q

Cornmeal agar with tween 80

A

used to differ candida species

26
Q

Candida albicans info

A

colonies with feet

pseudohyphae with chlamydospores on cornmeal agar

27
Q

Candida albicans ID

A

germ tube (+)
maltose (+)
galactose (+)
trehalose (+)

28
Q

Candida glabrata info

A

no hyphae or pseudohyphae

29
Q

Candida glabrata ID

A

maltose (+)

trehalose (+)

30
Q

Candida tropicalis info

A

multi branched pseudohyphae with blastoconidia singly or in chains along the pseudohyphae

31
Q

Candida tropicalis ID

A

maltose (+)
galactose (+)
cellobiose (+)
trehalose (+)

32
Q

Candida parapsilosis info

A

radiating pseudohyphae and scattered blastoconidia producing spider colonies

33
Q

Candida parapsilosis ID

A

maltose (+)
galactose (+)
trehalose (+)

34
Q

Candida krusi info

A

long, wavy, branched pseudohyphae with elongated to ovoid blastoconidia, budding off in branches

35
Q

Cryptococcus neoformans info

A

found in bat, pigeon and other bird droppings

36
Q

Cryptococcus gatti info

A

isolated from eucalyptus trees

37
Q

Cryptococcus species

A 
india ink (+) for capsules
direct Ag test
brown to black on bird seed agar
forms blastoconidia on cornmeal
urease (+)
38
Q

Trichosporon

A

causes white piedra
blastoconidia and arthroconidia present
urease (+)

39
Q

White piedra

A

human hair infection characterized by nodules attached to the hair shaft on head, axilla, and genitals

40
Q

Malassezia info

A

causes dermatological disorders such as pityriasis versicolor
growth medium supplemented with lipid (olive oil)

41
Q

Malassezia ID

A

spaghetti and meatballs appearance

hyphae and blastoconidia

42
Q

Rhodotorula info

A

found in moist environments

catheter line infection

43
Q

Rhodotorula ID

A

urease (+)

only forms blastoconidia

44
Q

Geotrichum candidum

A

actually a mold that may be misID as a yeast bc of similar morphology

45
Q

Geotrichum candidum ID

A

produce true hyphae with chains of arthroconidia

Microbiology (37 decks)

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