Cutaneous mycosis Flashcards

1
Q

Morbidity and Mortality of cutaneous mycoses

Infections are (common or rare?)

Exact prevalence (known or unknown?)

More common in (children or adult?)

A

Common

Unknown

Children

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2
Q

Morbidity and Mortality of cutaneous mycoses

Most infections are (serious or not serious?)

Immuno________ individuals

(Typical or Atypical?) , (locally or systemically?) aggressive lesions

A

Not serious

suppressed

Atypical, locally

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3
Q

DERMATOPHYTOSES

Three genera- _______,_______,_______

A

Trichophyton, Epidermophyton, Microsporum

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4
Q

Anthropophilic-reside on the ________

Zoophilic-reside on the ___________

Geophilic-reside in _____

A

human skin

skin of domestic and farm animals

Soil

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5
Q

DERMATOPHYTOSES
Transmission from humans or animals is by _______

A

infected skin scales

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6
Q

DERMATOPHYTOSES

Pathology
Dermatophytes use ______ as a source of nutrition

A

keratin

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7
Q

DERMATOPHYTOSES

Pathology

they infect _____,_____,_____

A

skin, hair, nails

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8
Q

DERMATOPHYTOSES

Pathology

All 3 organisms infect ________

A

attack skin

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9
Q

Microsporum does not infect _____

A

nails

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10
Q

Epidermophyton does not infect ________

A

hair

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11
Q

Dermatophytes invade underlying non- keratinized tissues

T/F

A

F

they do not invade underlying non- keratinized tissues

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12
Q

Zoophilic dermatophytes?

A

Microsporum

Trichophyton

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13
Q

CLINICAL SIGNIFICANCE
DERMATOPHYTOSES

Characterized by _____ ,________ that can become _______ and ____

A

itching,scaling skin patches

inflamed and weeping

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14
Q

DERMATOPHYTOSES Infection in different sites may be due to different organisms and is given different names

T/F

A

F

but is given one name

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15
Q

DERMATOPHYTOSES

Transmission Contact with:
–_______
–______

A

Arthrospores

Conidia

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16
Q

DERMATOPHYTOSES

Transmission Contact with:
– Arthrospores
• ( Sexual or Asexual?) spores formed in the _______ of the ______ stage

A

Asexual

hyphae

parasitic

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17
Q

DERMATOPHYTOSES

Transmission Contact with:

– Conidia
•______________ spores formed in the “ _____ ” _________ stage

A

Sexual or asexual

free-living

environmental

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18
Q

DERMATOPHYTOSES Transmission

Modes of transmission
– ______ with ____________
– __________ hairs/scales
–_______
– ______

A

Contact; infected animals/humans

Airborne

Fomites

Soil

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19
Q

tinea _______ - ringworm infection of the scalp (crusty hair)

20
Q

tinea ____ - ringworm infection of the body (smooth skin)

21
Q

tinea _____ - ringworm infection of the groin (_______)

A

cruris

jock itch

22
Q

tinea ______ - ringworm infection of the nails

23
Q

tinea _____ - ringworm infection of the beard

24
Q

tinea ________ - ringworm infection of the hand

25
tinea ______ - ringworm infection of the foot (_______)
pedis athlete's foot
26
tinea ______ - ringworm infection of the heads
capitis
27
tinea _____ - ringworm infection of the eyebrows
capitis
28
tinea ____ - ringworm infection of the eyelashes
capitis
29
tinea ____ - ringworm infection of the scalp
capitis
30
Diagnosis of dermatophytoses Collection of samples Specimens of skin, hair, nails Collected in ______________
folded black paper
31
Diagnosis Collection of samples, Stored up to ___________
12 months
32
Diagnosis Collection of samples, Nails by _______ Skin by _______ with ________ Hair by _______
clippings scrapping blunt scalpel plucking
33
PITYRIASIS VERSICOLOR (Tinea versicolor) (Superficial or deep?) (acute or chronic?) infection of _________
Superficial Chronic Stratum corneum
34
PITYRIASIS VERSICOLOR ( ______________ )
Tinea versicolor
35
PITYRIASIS VERSICOLOR (Tinea versicolor) Etio: __________ (Pityrosporum orbiculare), a Lipophilic ( yeast or mold?)
Malassezia furfur Yeast
36
PITYRIASIS VERSICOLOR (Tinea versicolor) Manifest as ___________
patches of discoloration of skin,
37
Diagnosis of P.vesicolor _______ , can be used to look for _____________ which is typical of pityriasis versicolor. ___________ to confirm the diagnosis.
Wood’s lamp yellow fluorescence Skin scrapings
38
PITYRIASIS vesicolor Under Direct microscopy has a _________________ appearence
sphagetti and meatball
39
Dermatophyte infections are not usually limited to the epidermis. T/F
F They are
40
MAJOCCHI'S GRANULOMA is an uncommon condition in which the dermatophyte invades the ___________ or ________
dermis or subcutaneous tissue.
41
MAJOCCHI'S GRANULOMA Can be precipitated by _________ or _________
trauma to skin or occlusion of hair follicles
42
MAJOCCHI'S GRANULOMA Common etiological agent is __________
T.rubrum
43
Lab diagnosis of MAJOCCHI'S GRANULOMA Skin biopsy Look for fungal hyphea *A potassium hydroxide (KOH) preparation, which identifies fungal forms only within the _________, may be (positive or negative?)
stratum corneum negative
44
Candidiasis can Present as Skin lesions T/F
T
45
Diagnosis Wood’s lamp examination - detects ___________ Potassium hydroxide microscopy- Detects ______ and ____ in skin scrapings or hair Fungal cultures- Required to ________ ,
Detects fluorescence hyphae and conidia identify organism