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MYCOLOGY AND VIROLOGY > SUPERICIAL FUNGI > Flashcards

SUPERICIAL FUNGI Flashcards

1
Q

among the most prevalent infectious disease

A

SUPERFICIAL FUNGI

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2
Q

mode of transmission :

A

person to person contact (garments, blankets, clothing)

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3
Q

hair infection with nodular masses of fungal elements surrounding the shaft

A

PIEDRA

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4
Q

infections of the skin

A

TINEA

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5
Q

macular pathches that are non-scaly

A

TINEA

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6
Q

Yeast

A

Malassezia furfur

Trichosporon beigelii

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7
Q

Mold

A

Piedra hortae

Exophiala werneckii

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8
Q

Exophiala werneckii other name

A

Phaeoannellomyces werneckii

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9
Q

Tinea versicolor/Pityriasis versicolor, Seborrhoeic dermatitis

A

Malassezia furfur

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10
Q
  • causes dandruff
A

Seborrhoeic dermatitis

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11
Q

Discoloration on the upper chest, back arms and neck

A

Malassezia furfur

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12
Q

Hypo/hyper pigmentation

A

Malassezia furfur

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13
Q

Lesions are well-demarcated

A

Malassezia furfur

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14
Q

brownish , scaly areas on light skin individuals
lightish , on dark skin individuals

A

Malassezia furfur

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15
Q

Fawn-colored macules

A

Malassezia furfur

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16
Q

most common presentation; trunk and upper arms

A

Fawn-colored macules

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17
Q

Wood’s Lamp Positive (light green flourescence)

A

Malassezia furfur

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18
Q

skin scrapings, indwelling catheter tips, blood

A

Malassezia furfur

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19
Q

– common in infants

A

indwelling catheter tips

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20
Q

Sabouraud’s Dextrose Agar or Sheep Blood Agar containing Acti-Dione

A

Malassezia furfur

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21
Q

Dixon’s Agar containing glycerol mono-oleate

A

Malassezia furfur

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22
Q

stimulates growth by natural oil or fatty substances

A

Malassezia furfur

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23
Q

culture media ; need an addition of oil

A

Malassezia furfur

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24
Q

1-2 weeks: bacteria-like

A

Malassezia furfur

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25
Q

Pasty white

A

Malassezia furfur

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26
Q

the collarettes of the phialides appear as distinct dark rings separation the mother and daughter cells

A

Malassezia furfur

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27
Q

10% KOH (glycerol w/ Parker ink or Calcofluor white)

A

Malassezia furfur

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28
Q

PAS/LCPB

A

Malassezia furfur

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29
Q

Electron Micrograph

A

Malassezia furfur

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30
Q

Under KOH – cluster of thick walled round budding yeast

A

Malassezia furfur

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31
Q

Short angular hyphal forms

A

Malassezia furfur

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32
Q

Topical Agent (imidazole, ketoconazole)

A

Malassezia furfur

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33
Q

Oral Tx

A

Malassezia furfur

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34
Q

Tinea nigra

A

Exophiala werneckii

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35
Q
  • chronic superficial fungal on palms
A

Tinea nigra

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36
Q

Predisposing factor:

A

excessive sweating

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37
Q

Age:

A

less than 20 yrs old female

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38
Q

Brown to black macules

A

Exophiala werneckii

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39
Q

(palmar and plantar and other surfaces of the skin)

A

Exophiala werneckii

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40
Q

skin scrapings

A

Exophiala werneckii

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41
Q

SDA – serves as primary isolation media.

A

Exophiala werneckii

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42
Q

: mucoid like colonies, yeast like , and shiny black appearance

A

young yeast

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43
Q

: velvety

A

mature, mold

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44
Q

Dematiaceous: pigment brown to dark

A

Exophiala werneckii

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45
Q

initially colonies are mucoid, yeastlike and shiny black

A

Exophiala werneckii

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46
Q

Abundant aerial mycelia and become velvety, dark olivaceous in colour

A

Exophiala werneckii

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47
Q

2-celled

A

Exophiala werneckii

48
Q

– spores

A

Annelloconidia

49
Q

– conidiophore

A

Annellophores

50
Q

after 7 days

growth of colony; color: off-white

A

Exophiala werneckii

51
Q

after 2 -3 weeks o color: olive black

A

Exophiala werneckii

52
Q

 10% KOH and Parker ink
 Calcofluor White Mounts

A

Exophiala werneckii

53
Q

Sulfur Soap, SSA (sulfosalicylic), Azoles, Tropical Treatment

A

Exophiala werneckii

54
Q
  • ascomycetous fungus: produces
    pores
A

Piedra hortae

55
Q
  • Common in central and south america and south east asia
A

Piedra hortae

56
Q

: produces pores

A

ascomycetous fungus

57
Q

o chronic fungal infection of
the hair shaft

A

Black Piedra

58
Q

o mostly affects young adults o epidemics in families

A

Black Piedra

59
Q

does not penetrate the hair follicle

A

Piedra hortae

60
Q

: rough or sandy

A

Scalp hair

61
Q

: black, hard, nodules
on the shaft

A

Infected hairs

62
Q

Nodules : hard fusiform

A

Piedra hortae

63
Q

: fungal cells cemented
together

A

Thick part

64
Q

: hyphal elements

A

Thin part

65
Q

hairs with hard black nodules

A

Piedra hortae

66
Q

o colonies are dark, brown-
black

A

Piedra hortae

67
Q

o take about 2-3 weeks to
appear

A

Piedra hortae

68
Q

spore: barrel shape arthroconidia

A

Piedra hortae

69
Q

hyphae: thick walled septate

A

Piedra hortae

70
Q
  • 10 days
A

Piedra hortae

71
Q
  • Glabrous/ cerebriform
A

Piedra hortae

72
Q

: greenish to black
with black reverse

A

Mature colonies

73
Q

10% KOH w/ Parker ink; Calcofluor
white

A

Piedra hortae

74
Q

Nodules: pigmented center
containing asci

A

Piedra hortae

75
Q
  • Spore/condia
A

Piedra hortae

76
Q
  • Hypahe
A

Piedra hortae

77
Q

shave or cut the hairs short, terbinafine

A

Piedra hortae

78
Q

: 250 mg/per day for 6 weeks

A

Terbinafine

79
Q
  • Grows at 370C
A

Trichosporon beigelii

80
Q
  • Sensitive to cycloheximide
A

Trichosporon beigelii

81
Q

o superficial cosmetic fungal
infection of the hair shaft

A

White Piedra

82
Q

o affects scalp, axilla, facial
and genital hair

A

White Piedra

83
Q
  • common in young adults
A

Trichosporon beigelii

84
Q
  • irregular, soft, white or light brown
    nodules firmly adhering to the hairs
A

Trichosporon beigelii

85
Q
  • soft white nodules
A

Trichosporon beigelii

86
Q

o white or yellowish to deep
cream colored

A

Trichosporon beigelii

87
Q

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

A

Trichosporon beigelii

88
Q
  • Spore : sympodial blastoconidia – an arthroconidia with pseudohyphae
A

Trichosporon beigelii

89
Q
  • Hyphae : Hyaline septate
A

Trichosporon beigelii

90
Q
  • 5 days
A

Trichosporon beigelii

91
Q
  • Cream and waxy
A

Trichosporon beigelii

92
Q
  • Spore
A
93
Q
  • Hyphae
A

Trichosporon beigelii

94
Q

shave the hairs, tropical

A

Trichosporon beigelii

95
Q

Tinea Versicolor

A

Malassezia furfur

96
Q

Yeast

A

Malassezia furfur
Trichosporon beigelii

97
Q

Mould

A

Exophiala werneckii (Phaeoannellomyces werneckii)
Piedra horta

98
Q

Skin (chest, arms, back)

A

Malassezia furfur

99
Q

Temperate

A

Malassezia furfur
Trichosporon beigelii

100
Q

Hypopigmented

A

Malassezia furfur

101
Q

Requires Fatty Acids

A

Malassezia furfur

102
Q

Spaghetti and meatballs (PAS), bowling pins (electromicrograph), medicine capsule

A

Malassezia furfur

103
Q

Tinea Nigra

A

Exophiala werneckii (Phaeoannellomyces werneckii)

104
Q

Skin (hands, feet)

A

Exophiala werneckii (Phaeoannellomyces werneckii)

105
Q

Tropical

A

Exophiala werneckii (Phaeoannellomyces werneckii)
Piedra horta

106
Q

Dark, Macular

A

Exophiala werneckii (Phaeoannellomyces werneckii)

107
Q

Slow growth

A

Exophiala werneckii (Phaeoannellomyces werneckii)

108
Q

Anneloconidia

A

Exophiala werneckii (Phaeoannellomyces werneckii)

109
Q

Black Piedra

A

Piedra horta

110
Q

Hair (scalp, eyebrows, eyelashes, pubic hair)

A

Piedra horta

111
Q

Black, hard

A

Piedra horta

112
Q

Barrel-shaped arthroconidia

A

Piedra horta

113
Q

White Piedra

A

Trichosporon beigelii

114
Q

Hair (mustache, beard, axillary, groin)

A

Trichosporon beigelii

115
Q

White, soft

A

Trichosporon beigelii

116
Q

Sympodial blastoconidia

A

Trichosporon beigelii

MYCOLOGY AND VIROLOGY (24 decks)

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