U3 LEC: SUPERFICIAL MYCOSES

Question 1

Infections confined to the outermost layer of skin or hair

Answer 1

Superficial Mycoses

Question 2

Superficial mycoses are infections confined to the?

Answer 2

outermost layer of skin or hair

Question 3

Skin infections

Answer 3

Tineas

Question 4

Hair infections

Answer 4

Piedras

Question 5

T/F: Superficial mycoses do not show overt symptoms.

Answer 5

True

Question 6

Latin, meaning worm

Answer 6

Tinea

Question 7

Clinical manifestation of Malassezia furfur

Answer 7

Tinea versicolor

Question 8

Tinea versicolor is caused by?

Answer 8

Malassezia furfur

Question 9

Tinea versicolor is also known as?

Answer 9

Pityriasis versicolor

Question 10

Tinea versicolor

Lesions

Answer 10

Patchy lesions or scaling of varied pigmentation

Question 11

Tinea versicolor

Thought to be cause of?

Answer 11

dandruff

Question 12

T/F: Tinea versicolor affects all ages.

Answer 12

True

Question 13

Tinea versicolor

May involve what areas?

Answer 13

any area but primarily:
- face
- chest
- trunk
- abdomen

Question 14

Tinea versicolor

Patches in darkly pigmented skin

Answer 14

Pale patches

Question 15

Tinea versicolor

Spots in fair skin

Answer 15

Fawn-colored liver spots

Question 16

Tinea versicolor

Evident in?

Answer 16

warm months

Question 17

Common endogenous skin colonizer

Answer 17

Malassezia furfur

Question 18

M. furfur is ____philic

Answer 18

lipo

Question 19

Appearance of M. furfur

Answer 19

spaghetti and meatballs

Question 20

M. furfur

Epidemiology

Answer 20

worldwide, hot, humid and tropical locations

Question 21

M. furfur

Risk factors

Answer 21

• receiving corticosteroid therapy
• genetic influence
• poor nourishment
• excessive sweating

Question 22

M. furfur

Treatment

Answer 22

• antidandruff shampoos
• removal of indwelling feeding lines (lipid replacement therapy, infants)
• selenium sulfide
• topical or oral azoles

Question 23

M. furfur

Daily applications of?

Answer 23

selenium sulfide

Question 24

Clinical manifestation of Hortaea werneckii

Answer 24

Tinea nigra

Question 25

Tinea nigra is caused by?

Answer 25

Hortaea werneckii

Question 26

Tinea nigra Appearance

Answer 26

Brown to block non-scaly macules

Question 27

Tinea nigra Occur most often on?

Answer 27

palms and soles

Question 28

T/F: Misdiagnosis in Tinea nigra does not occur.

Answer 28

False can occur

Question 29

Tinea nigra Epidemiology

Answer 29

Tropical areas of - Central and South America - Africa - Asia

Question 30

H. werneckii is formerly known as?

Answer 30

- Phaeoannellomyces werneckii - Exophiala werneckii

Question 31

H. werneckii Rate of growth in common fungal media

Answer 31

very slow

Question 32

H. werneckii is what kind of fungus?

Answer 32

Dematiaceous

Question 33

H. werneckii Treatment

Answer 33

- Keratolytic solutions - Salicylic acid - Azole antifungal drugs

Question 34

Clinical Manifestation of Piedraia hortae

Answer 34

Black piedra

Question 35

Black piedra is caused by?

Answer 35

Piedraia hortae

Question 36

Black piedra Infection of the?

Answer 36

hairs of the scalp

Question 37

Black piedra Appearance of nodules

Answer 37

Hard, dark brown to black

Question 38

Black piedra The nodules are firmly attached to the?

Answer 38

hair shaft

Question 39

Black piedra Epidemiology

Answer 39

Tropical areas: - Africa - Asia - Latin america

Question 40

P. hortae Treatment

Answer 40

- Removal of infected hair - Topical antifungal agent

Question 41

Clinical manifestation of Trichosporon spp.

Answer 41

White Piedra

Question 42

White Piedra is caused by?

Answer 42

Trichosporon spp.

Question 43

White Piedra Occurs on?

Answer 43

hair shaft

Question 44

White Piedra Appearance of mycelia

Answer 44

Soft mycelial mat

Question 45

White Piedra Soft mycelial mat surrounds?

Answer 45

- hair of the scalp - face - pubic region

Question 46

White Piedra Epidemiology

Answer 46

Tropical areas - South America - Africa - parts of Asia

Question 47

No longer a valid species infecting humans

Answer 47

Trichosporon beigelii

Question 48

Implicated in most cases of superficial mycoses

Answer 48

- T. ovoides - T. asteroids - T. cutaneum - T. inkin

Question 49

Severe and frequently fatal disease in immunocompromised hosts

Answer 49

T. asahii

Question 50

Causes meningitis

Answer 50

T. mucoides

Question 51

Occasionally found as part of normal skin biota

Answer 51

Trichosporon spp.

Question 52

Trichosporon spp. Isolated from?

Answer 52

animals and soil

Question 53

Trichosporon spp. Recognized as

Answer 53

opportunistic systemic pathogens

Question 54

Trichosporon spp. under Opportunistic systemic pathogens

Answer 54

- frequently fatal - occur in immunocompromised host - hematologic disorders or malignancies - undergoing chemotherapy

Question 55

Trichosporon spp. Treatment

Answer 55

- removal of infected hair - topical antifungal agent