Superficial & Cutaneous Mycoses Flashcards

1
Q

what is another name for dermatophytosis or tinea

A

ringworm

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2
Q

what layer of the skin/hair does dermatophytosis infect

A

outermost

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3
Q

what protein do dermatophytes love

A

keratin

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4
Q

def? love keratin

A

keratinophilic

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5
Q

name of causative agent found in the soil

A

geophilic

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6
Q

name of causative agent found on humans

A

anthropophilic

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7
Q

name of causative agent found on animals

A

zoophilic

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8
Q

what layers of the skin make up the superficial layer (3)

A

keratinized, epidermis, and dermis

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9
Q

is ringworm a fungus or mold

A

fungus

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10
Q

what kind of rash do you get when you have ringworm

A

circular,
red, and itchy

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11
Q

what kind of fungi cause ringworm (common name)

A

dermatophytes

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12
Q

what specific fungi. cause ringworm (3)

A

trichophyton, microsporum, and epidermophyton

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13
Q

what enzyme do dermatophytes have that help them invade the epidermis

A

keratinases

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14
Q

what kind of hyphae do dermatophytes have (3)

A

septated, branched, and arthroconidia

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15
Q

do dermatophytes invade the hair shaft

A

sometimes

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16
Q

aka tinea or dermatophytosis

A

ringworm

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17
Q

what is it called when arthroconidia grow outside of the hair shaft

A

ectothrix

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18
Q

during an ectothrix infection is the hair cuticle destroyed

A

yes

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19
Q

if you have an ectothrix infection will it Florence under a woods lamp

A

yes

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20
Q

what is it called when arthroconidia grow outside and inside the hair shaft

A

ecto-endothrix

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21
Q

what is it called when arthroconidia grow inside of the hair shaft

A

endothrix

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22
Q

during an endothrix infection is the hair cuticle destroyed

A

no

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23
Q

if you have an endothrix infection will it Florence under a woods lamp

A

no

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24
Q

what is the most severe dermatophyte hair invasion

A

favus

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25
Q

what is another name for favus

A

honeycomb

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26
Q

what is it called when hyphae are at the base of hairs with air spaces in the hair shaft

A

favus

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27
Q

what is the name for head ringworm

A

tinea capitis

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28
Q

what is the name for feet ringworm

A

tinea pediis

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29
Q

what is the name for hand ringworm

A

tinea manuum

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30
Q

what is the name for groin ringworm

A

tinea cruris

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31
Q

what is the name for beard/mustache ringworm

A

tinea barbae

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32
Q

what is the name for finger/toenails ringworm

A

tinea unguium

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33
Q

what is the name for body ringworm

A

tinea corporis

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34
Q

what layer of the scalp does tinea capitis invade

A

stratum corneum layer

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35
Q

t or f: tinea capitis grows downward into the hair shaft

A

t

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36
Q

is inflammatory or non-inflammatory tinea capitis worse

A

inflammatory

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37
Q

what kind of tinea capitis has gray patches, black dots, and dandruff like

A

non-inflammatory

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38
Q

what kind of tinea capitis has hair loss, pustular, and crusted

A

inflammatory

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39
Q

how do you get tinea capitis

A

skin to skin, touching infected animals/objects

40
Q

what organism causes favus

A

T. schoenleinii

41
Q

what is another name for tinea pedis

A

athlete’s foot

42
Q

how does tinea pedis spread to other parts of the body

A

scratching and picking

43
Q

what is the most common type of ring worm

A

tinea pedis

44
Q

what organism causes tinea manuum

A

t. rubrum

45
Q

if someone has tinea pedis what other ringworm are they likely to have

A

tinea manuum

46
Q

(ringworm) ___ foot, one ____ syndrome

A

2; hand

47
Q

what kind of proteins does t. rubrum use to mediate the adherence to the epithelial tissue

A

mannan glycoproteins

48
Q

how does t. rubric penetrate into skin

A

proteases

49
Q

how does t. rubrum suppress lymphocyte response

A

cell wall mannan

50
Q

what kind of ringworm is known as the jock itch

A

tinea cruris

51
Q

why is the groin a good Environment for dermatophytes

A

moist and alkaline pH

52
Q

what organism causes tinea cruris

A

t. rubrum

53
Q

what kind of ringworm is known as barber’s itch

A

tinea barbae

54
Q

what kind of tinea barbae is zoophilic

A

inflammatory

55
Q

what kind of tinea barbae is anthropophilic

A

noninflammatory

56
Q

what kind of tinea barbae is tender, weeping nodule, with pustules

A

inflammatory

57
Q

what kind of tinea barbae is small, red, itchy bumps

A

noninflammatory

58
Q

what is the major cause of onychomycosis

A

tinea unguium

59
Q

def? a fungal nail infection caused by yeast or dermatophyte

A

onychomycosis

60
Q

what kind of ringworm is the most difficult to treat

A

tinea unguium

61
Q

what kind of organism causes tinea corporis

A

t rubrum

62
Q

what kind of ringworm has a soil exposure

A

tinea corporis

63
Q

what is name for body ringworm that athletes get

A

tinea corporis gladatorum

64
Q

who does trichophyton rubrum infect

A

humans

65
Q

what is the name of the microconidia of T. rubrum

A

birds-on-a-wire

66
Q

Trichophyton mentagrophytes is predominantly what kind of exposure

A

zoophilic

67
Q

does t. mentagrohytes have more macro or microsporidia

A

microsporidia

68
Q

what kind of hyphae do T. mentagrophytes have

A

spiral

69
Q

what kind of hair shaft invasion does T. mentagrophytes do

A

ecto-endothrix

70
Q

what kind of hair shaft invasion does T. Tonsurans do

A

endothrix

71
Q

what organism causes black-dot tinea capitis

A

T. tonsurans

72
Q

what kind of spores does T. tonsurans have

A

chlamydospores

73
Q

does t. tonsurans have more macro or microconidia

A

microconidia

74
Q

what shape macrocondidia of microsporum canis

A

spindle

75
Q

what is the shape of microconidia of microspourm Canis

A

narrow club shaped

76
Q

what kind of hair shaft invasion does M. canis do

A

ectothrix

77
Q

M. canis is predominantly what kind of exposure

A

zoophilic

78
Q

what kind of animal host m. canis

A

cat

79
Q

what color does m. canis fluoresce under woods lamp

A

blue green

80
Q

does microsporum gypseum have more macro or microconidia

A

macroconidia

81
Q

where do you find m. gypseum

A

soil

82
Q

what kind of hair infection does m. gypseum do

A

ecto-endothrix

83
Q

what is the shape of epidermophyton floccosum macroconidia

A

club-shaped

84
Q

T or f: e. floccosum has microconidia

A

F

85
Q

T or F: e. floccosum can form chlamydospores

A

T

86
Q

what kind of hair invasion does e. floccosum do

A

none

87
Q

def? superficial fungal infection of the hair shaft that presents as small nodules

A

piedra

88
Q

what causes piedra

A

excessive use of hair oil

89
Q

what organism causes white piedra (pubic)

A

t. inkin

90
Q

what organism causes scalp white piedra

A

T ovoides

91
Q

what organism causes black piedra

A

Piedraia hortae

92
Q

what organism causes thrush

A

candida

93
Q

who often gets thrush

A

immunosuppressed and babies

94
Q

what organism causes tinea nigra

A

hortaea wernickii

95
Q

what has hyper pigmented patch of infected skin

A

tinea nigra

96
Q

what kind of environment does tinea nigra like

A

salty

97
Q

what kind of Environment does malassezia like

A

lipid dependent