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MYCOVIR > sup mycoses and dermato > Flashcards

sup mycoses and dermato Flashcards

1
Q

Chronic superficial fungal infection of the palms (disease & agent)

A

Tinea nigra, Exophiala werneckii

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2
Q

2-celled yeast cell

A

Exophiala werneckii

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2
Q

color of tinea nigra in the skin

A

brown to black macules

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3
Q

diameter of tinea nigra

A

1-5cm

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4
Q

Abundant aerial mycelia and become velvety, dark olivaceous in colour

A

mature mould

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5
Q

Initially colonies are mucoid, yeast-like and shiny black.

A

young yeast)

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6
Q

Management & Treatment of tinea nigra

A

Sulfur soap, salicylic acid, azoles
Topical treatment
o Whitfield’s ointment (benzoic acid compound)
o Imidazole agent twice a day for 3-4x a week

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7
Q

Hyper- or hypopigmented of the skin.

A

Tinea/Pityriasis Versicolor

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8
Q

“Fawn-colored macules”

A

Tinea/Pityriasis Versicolor

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9
Q

lipophilic basidiomycetous yeasts

A

Malassezia furfur

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10
Q

Found as a normal flora on the skin

A

Malassezia furfur

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11
Q

Follicular papules and pustules

A

Pityrosporum folliculitis

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11
Q

fungal acne

A

Pityrosporum folliculitis

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12
Q

Degradation of sebum and consumption of fatty acids

A

Seborrheic dermatitis

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12
Q

common among infants as venous IV catheter acquired

A

Systemic Infection (M. furfur)

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12
Q

Has the ability to changes in quantity and composition of sebum due to Malassezia spp.

A

Seborrheic dermatitis

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13
Q

erythema and scaling in areas with a rich supply of sebaceous glands

A

Seborrheic dermatitis

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14
Q

Yeast cells look like phialioconidium

A

Malassezia furfur

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15
Q

looks like Spaghetti & Meatballs under the microscope

A

Malassezia furfur

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16
Q

short septate hyphae in short chain

A

Malassezia furfur

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16
Q

epidemics in families

A

Black Piedra

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17
Q

Sources of fatty acids:

A

natural oil and olive oil

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18
Q

culture containing cycloheximide (Acti-dione) with olive oil

A

Sabouraud’s dextrose agar or Sheep blood agar

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18
Q

Chronic fungal infection of the hair shaft (disease and agent)

A

Piedraia hortae (Black piedra)

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19
Q

hyphal elements

A

thin part

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19
Q

superficial cosmetic fungal infection of the hair shaft

A

trichosporon ovoides/ white piedra

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19
Q

agar containing glycerol mono-oleate

A

Dixon’s agar

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19
Q

irregular, soft, white or light brown nodules firmly adhering to the hairs

A

White piedra

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19
Q

has Arthroconidia and Blastoconidia

A

Trichosporon ovoides/white piedra

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19
Q

white or yellowish to deep cream colored

A

Trichosporon ovoides/ white piedra

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19
Q

fungal cells cemented together

A

Thick part

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19
Q

source of fatty acid in Dixon agar

A

oleic acid

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19
Q

Ascomycetous fungus

A

Piedraia hortae (Black piedra)

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19
Q

old name of Trichosporon ovoides

A

Trichosporon beigelii

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20
Q

topical treatment of Trichosporon beigelii

A

imidazole agent

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20
Q

Colonies are greenish black

A

Piedraia hortae (Black piedra)

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20
Q

smooth, wrinkled, velvety, dull colonies with a mycelial fringe.

A

Trichosporon ovoides/ white piedra

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20
Q

its culture Take about 21 days

A

Piedraia hortae (Black piedra)

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20
Q

use keratin as a source of

A

nitrogen

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20
Q

between fingers

20
Q

length of white piedra

A

1.0 - 1.5 mm in length

20
Q

“ringworm” disease (mycotic infection) of
the nails, hair, and/or stratum corneum of the skin caused by fungi called

A

Dermatophytoses

20
Q

primary isolation media of white piedra

A

Yeast base agar

20
Q

major protein found in horns, hooves,
nails, hair, and skin.

20
Q

scalp & eyebrows

A

Tinea capitis

20
Q

demonstrate pigment
production by Trichophyton rubrum

A

Potato dextrose agar

20
Q

more general name for any skin disease
caused by a fungus

A

Dermatomycoses

21
Q

ringworm in feet

21
Q

genitalia

21
Q

special form of Tinea corporis usually
concentric rings on skin

21
Q

rinbgworm in face

21
Q

rinbgworm in fingernails

21
Q

hairy parts of face

A

Tinea barbae

21
Q

face, arms, trunks

21
Q

no scaling

A

Alopecia areata

21
Q

(agar) T. rubrum (-) is differentiated from T. mentagrophytes (+) by amount of pigment produced

A

Corn meal agar (CMA) + 10% glucose:

21
Q

diffuse hair loss

A

Seborrheic dermatitis

21
Q

antibody that is activated when exposed to mold and attaches to mast cells

21
Q

no loss of hair, silvery scaling

21
Q

Laboratory Tests for Dermatophytes
Direct Microscopy using

A

10% KOH or 20% КОН

21
Q

Apple green fluorescence of ectothrix hair

A

Microsporum audouinii

22
Q

negative in Hair Baiting Test

A

T. rubrum and m equinum

22
Q

obverse color Microsporum audouini

A

gray to tan white

22
Q

cinnamon color, powdery colonies

A

Microsporum gypseum

22
Q

3-9 celled, broadly spindle-shaped, rough walled macroconidia

A

. Microsporum gypseum

22
Q

reverse color Microsporum audouini

A

light salmon with red brownish center

22
Q

thin colonies with feathery
edge; center of colony is white to buff, edges are orange yellow

A

Microsporum canis

23
Q

lemon yellow/yellow orange

A

Microsporum canis

23
Q

beak-like shaped rough
macroconidia

A

Microsporum canis

23
Q

Green yellow fluorescence of ectothrix hair

A

Microsporum canis

23
Q

Center of colonies tend
to be folded, khaki
green to yellow color

A

Epidermophyton floccosum

23
Q

moderately thick, smooth walls (beaver tails)

A

Epidermophyton floccosum

23
Q

White, pink, granular, fluffy colonies;
with occasionally light yellow periphery

A

mentagrophytes

23
Q

reverse: yellow brown
with folds

A

Epidermophyton floccosum

23
Q

White downy-pink granules, rugal folds
are common

23
Q

Favic chandeliers and chlamydospores
common

A

schonleinii

23
Q

Source of infection of Epidermophyton floccosum

A

Sharing of linens, towels or clothes
Athletes, soldiers, ship crews

23
Q

White, tan-yellow or rust, suede like to
powdery. Wrinkled and heaped or sunken
crater

23
Q

Irregularly hip, smooth, white cream with
radiating grooves

A

schonleinii

23
Q

Port-wine/deep violet, heaped on flat
with waxy surface

23
Q

Macronidia: few, smooth walled, cigar
shaped, connected to hyphae with
definite narrow attachment

A

mentagrophytes

23
Q

Micronidia: spherical often in grape-like
clusters spiral hyphae

A

mentagrophytes

24
Q

Macroconidia: few, smooth-walled,
pencil-shaped

24
Q

Microconidia tear shaped and lateral
along hyphae

24
Q

“Balloon Forms”- aged pleomorphic
microconidia

24
Q

Swollen hyphae containing cytoplasmic
granules

24
Q

Microconidia: large, clavate, lateral

A

verrucosum

24
Q

Macroconidia: “rat tail”, 3-5 cells thin
walled

A

verrucosum

24
Q

Often start on the scrotum and spread to the groin as dry, itchy lesions

A

Tinea cruris or “jock itch”

24
Q

Tinea unguium and
tinea cruris are often
caused by this fungus.

A

Epidermophyton floccosum

25
Q

Arthroderma otae

A

Microsporum canis

25
Q

Atypical vegetative hyphae with terminal
chlamydospore

A

microsporum audouinii

25
Q

rare

A

tinea nigra and black piedra

25
Q

common

A

versicolor, seb dermititis and follicular

MYCOVIR (4 decks)

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