Cutaneous Mycoses/Dermatomycoses

Question 1

Is common fungal skin infection otherwise known as Tinea.

Answer 1

Ringworm

Question 2

Types of ringworm:

Body

Answer 2

Tinea corporis

Question 3

Types of ringworm:

Scalp

Answer 3

Tinea capitis

Question 4

Types of ringworm:

Feet

Answer 4

Tinea pedis or athlete’s foot

Question 5

Types of ringworm:

Groin

Answer 5

Tinea corporis or jock itch

Question 6

3 main genera of ringworm:

Answer 6

Microsporum
Trichophyton
Epidermophyton

Question 7

3 main genera of ringworm:

=affects the hair and skin

Answer 7

Microsporum

Question 8

3 main genera of ringworm:

=affects the hair, skin and nails

Answer 8

Trichophyton

Question 9

3 main genera of ringworm:

=affects the skin and nails

Answer 9

Epidermophyton

Question 10

In ringworm, for nails and skin observes _____

Answer 10

hyaline, septate hyphae

Question 11

In ringworm, hair, skin and nail culture uses __________ and incubate at RT 4-6 weeks before
reporting

Answer 11

mycosel or mycobiotic medium

Question 12

Latin noun:
ringworm infection of the head and scalp

Answer 12

Tinea capitis

Question 13

Latin noun:
=ringworm infection of the inguinal area( e.g. jock itch, gym’s itch, ringworm of the groin)

Answer 13

Tinea cruris

Question 14

Latin noun:
=ringworm infection of the body

Answer 14

Tinea corporis

Question 15

Latin noun:

ringworm infection of the beard or mustache (barber’s itch)

Answer 15

Tinea barbae

Question 16

Onchomycosis is most often due to

Answer 16

Trichophyton rubrum and T. interdigitale

Question 17

Onchomycosis can be present as several different patterns:

A white or yellow opaque streak appears at one side of the nail.

Answer 17

Lateral onychomycosis

Question 18

Onchomycosis can be present as several different patterns:

Scaling occurs under the nail

Answer 18

Subungual hyperkeratosis

Question 19

Onchomycosis can be present as several different patterns:

The end of the nail lifts up. The free edge often crumbles.

Answer 19

Distal onycholysis

Question 20

Onchomycosis can be present as several different patterns:

Flaky white patches and pits appear on the top of the nail plate

Answer 20

Superficial white onychomycosis

Question 21

Onchomycosis can be present as several different patterns:

Yellow spots appear on the half-moon (lunula)

Answer 21

Proximal onychomycosis

Question 22

Macroconidia: Rare, if present “spindle-shaped”
Microconidia: Rare, “leaf-like” or absent
Colony: Downy white to salmon pink

Answer 22

Microsporum audonii

Question 23

Common caused of ringworm in dogs and cats

Characteristic colony: white and fluffy; reverse canary yellow pigment, large thick walled, spindle shaped “boat-shaped”

Answer 23

Microsporum canis

Question 24

Characteristic colony: Mold and cottony light brown “cinnamon powdery color

Answer 24

Microsporum gypseum

Question 25

Characteristic; thick septa, “bamboo” hyphae

Answer 25

Microsporum ferrugineum

Question 26

Worldwide cause of athletes foot

Characteristic Microscopic
appearance
Macroconidia: “cigar-shaped” 2-cells
Microconidia: “grape-like clusters” or “engrappe” lateraly along the hyphae

Answer 26

Tricophyton mentagrophyte

Question 27

Macroconidia: usually absent; if present “pencil-shaped” 3-8 septa
Microconidia: “tear-drop” most commonly borne along the ides of hyphae

Answer 27

Tricopohyton rubrum

Question 28

Characteristic of skin lesion is CONCENTRIC/RING-SHAPED in appearance

Balloon shaped chlamydoconidia

Answer 28

Tricophyton concentricum

Question 29

Macroconidia: “balloon” forms are seen

Microconidia: “tear-drop/ club-shaped” with flat bottons

Answer 29

Tricophyton tonsurans

Question 30

Macroconidia: rare; but form “rat-tail” type, 3-5 cell, thin walled

Microconidia: rare; large and “tear-drop” when seen

Answer 30

Tricophyton verrucosum

Question 31

Branched tortuous hyphae

Chlamydospore are usually aligned in chains

Colony; Portwine to deep violet colony

Answer 31

Tricophyton violaceum

Question 32

Hyphae seen as “favic-chandeliers”

Colony: Irregular heaped, smooth white to cream colony with radiating grooves

Answer 32

Tricophyton shoenleinii

Question 33

Microscopic characteristics: “club-shaped macroconidia” usually formed singly or in clusters

No microconidia

Colony: Center of the colony tends to be folded and is khaki green, periphery is yellow

Answer 33

Epidermophyton floccosum