Mycoses

Question 1

Type of fungal infection that affects primarily the outermost layer of the skin

Answer 1

Superficial Mycoses

Question 2

Type of fungal infection that affects the keratinized tissue (skin, hair, and nails)

Answer 2

Cutaneous Mycoses

Question 3

Type of fungal infection that affects the deep layer of skin

Answer 3

Subcutaneous Mycoses

Question 4

Type of fungal infection that is caused by dimorphic fungi

Answer 4

Systemic Mycoses

Question 5

How is subcutaneous infection acquired?

Answer 5

Trauma; feet is usually affected

Question 6

How is systemic infection acquired?

Answer 6

Inhalation; lungs is usually infection

Question 7

Identify:

a. Name of infection
b. Agent of infection

• characterized by discoloration/depigmentation of the skin

Answer 7

a. Tinea/Pityriasis versicolor
b. Malassezia furfur

Question 8

Identify:

a. Name of infection
b. Agent of infection

• brown to black patches on palms and soles of hands and feet

Answer 8

a. Tinea nigra
b. Hortaea werneckii

Question 9

Identify:

a. Name of infection
b. Agent of infection

• affects the scalp hair

Answer 9

a. Black piedra
b. Piedraia hortae

Question 10

Identify:

a. Name of infection
b. Agent of infection

• affects facial, genital hair

Answer 10

a. White piedra
b. T. beigelii

Question 11

Agent of superficial mycosis that has spaghetti and meatball appearance under the microscope

Answer 11

Malassezia furfur

Question 12

Agent of superficial mycosis that develops bowling pin or medicine bottle colonies on culture media

Answer 12

Malassezia furfur

Question 13

Other names for Tinea nigra (2)

Answer 13

1. Keratomycosis nigricans
2. Tinea nigra palmaris

Question 14

Identify the species that infect the following:

a. Bodily skin
b. Groin
c. Skin between toes
d. Skin between fingers
e. Scalp hair
f. Hair follicles
g. Nail and nail bed
h. Beard
i. Body (distinctive lesions)

Answer 14

a. Bodily skin - Tinea corporis
b. Groin - Tinea cruris
c. Skin between toes - Tinea pedis
d. Skin between fingers - Tinea manuum
e. Scalp hair - Tinea capitis
f. Hair follicles - Tinea favosa
g. Nail and nail bed - Tinea unguium/Onchomycosis
h. Beard - Tinea barbae
i. Body (distinctive lesions) - Tinea imbricates

Question 15

Cutaneous mycoses:

Which genera affects only the skin and hair, but rarely nails?

Answer 15

Microsporum

Question 16

Cutaneous mycoses:

Which genera affects only the skin and nail, but rarely hair?

Answer 16

Epidermophyton

Question 17

Cutaneous mycoses:

Which genera affects the skin hair, and nails?

Answer 17

Trichophyton

Question 18

Cutaneous mycoses:

This species only produce smooth walled macroconidia that appears as “Beaver’s Tail”

Answer 18

Epidermophyton floccosum

Question 19

Cutaneous mycoses:

This shows “Birds on a fence appearance”

Answer 19

Trichophyton rubrum

Question 20

Cutaneous mycoses:

Appears tear-shaped or clavate microconidia laterally on hyphae under the microscope

Answer 20

Trichophyton rubrum

Question 21

Cutaneous mycoses:

Microconidia appears globose and arranged in grape-like clusters

Answer 21

Trichophyton mentagrophyes

Question 22

Cutaneous mycoses:

Hair Baiting: (+)
Urease: (+)
Red Pigment: (-)

Answer 22

Trichophyton mentagrophyes

Question 23

Cutaneous mycoses:

Appears spindle-shaped, large multiseptated with knobby projections

Answer 23

Microsporum canis (zoonotic)

Question 24

Cutaneous mycoses:

Infected hair shaft appears fluorescent yellow green using Wood’s Lamp Rice Medium

Answer 24

Microsporum canis