0105100930 - Mfm Ii - Superficial And Cutaneous Mycoses (Alley)

Front 1

What is superficial mycoses?

Back 1

Mycoses of the outermost layers of skin and hair. Usually cosmetic.

Front 2

What is cutaneous mycoses?

Back 2

Keratinized surface infections: skin, hair, nails. Cutaneous infections and perpetuated by keratinase produced by fungus that breaks down keratin.

Front 3

What superficial mycoses presents as irregularly pigmented macules that are well demarcated occuring on any part of the body?

Back 3

Tinea Versicolor

Front 4

What is the causative agent of Tinea Versicolor? And is it contagious?

Back 4

Liphilic yeast Malassezia furfur. YES. Direct or indirect.

Front 5

How to dx Tinea Versicolor?

Back 5

Microscropy or Culture with oil agar, also lesions fouresce under a Wood lamp a yellowish color, where as eythasma fluoresces pink.

Front 6

What cutaneous fungus presents with solitary irregular pigmented brown or black macules on the soles or palms?

Back 6

Tinea Nigra

Front 7

What is the causative agent for Tinea Nigra?

Back 7

Hortaea wernickii

Front 8

What is the best lab method to identify H. wenickii?

Back 8

KOH mount, followed by culture. Mount shows two cell oval yeast w/ short hyphae.

Front 9

What fungal etiology is shown?

Back 9

two cell oval yeast and short hyphae of H. wernickii, which causes Tinea Nigra.

Front 10

What is the differential for H. wevneckii and Tinea Nigra?

Back 10

Malignant melanoma.

Front 11

What is the difference between white and black piedra?

Back 11

White - caused by Trichosporon around the groin and axilla. Black - caued by Piedraia hortae and occurs on the scalp.

Front 12

How is the White Piedra causing Trichosporon visualized with microscropy and culture?

Back 12

Microscopy - hyphae, arthroconidia, budding yeast. Culture - arthroconidia, blastoconidia.

Front 13

How is the Black Piedra causing P. hortae visualized with microscopy and culture?

Back 13

Microscopy - Brached, pigmented hyphae. Culture - Ascus, ascospores.

Front 14

Treatment for all superficial mycoses?

Back 14

Topical antifungal cream, hair removal for piedra.

Front 15

Where do cutaneous mycoses reside?

Back 15

Exclusively in keratin containing tissue: hair, nails, skin.

Front 16

What are dermatophytes?

Back 16

Fungus that invades keratin containing tissue, also known as keritinophilic fungi.

Front 17

What special enzyme do dermatophytes secrete?

Back 17

Keratinase, recall they are called keritinophilic, to digest keratin.

Front 18

How are dermatophytes catagorized?

Back 18

By route of transmission:
1) Anthrophilic - person to person transfer
2) Geophilic - earth to person
3) Zoophilic - animal to person

Front 19

What microscopic structural characteristics do dermatophytes possess?

Back 19

macroconidia or microconidia

Front 20

Describe the Epidermophyton - E. flocossum dermatophyte.

Back 20

infects in skin and nails
culture forms yellow-white cotton appearance
Macroconidia can be visualized as a big paddle with segments. No Microconidia

Front 21

Describe the Microsporum dermatophyte species.

Back 21

infects skin and nails
wood lamp fluoresces bright green
visualized macrocodia like symmetrical spindles with segments

Front 22

Describe the Trichophyton dermatophyte species.

Back 22

infect skin, hair, nails
Microconidia with various shapes, macroconidia rare

Front 23

What tissue is infected by Trichophyton and Microsporum?

Back 23

skin, hair, nails

Front 24

What climate are T. ruburm, T. mentagrophytes and M. canis most frequently found in?

Back 24

tropical and tmperate

Front 25

What hair follicle abnormality does T. schoenleinii uniquely cause?

Back 25

favus (air bubbles)

Front 26

What condition does Epidermophyton cause?

Back 26

rarely tinea unguium and never tinea capitis or barbae

Front 27

Where are M. Canis and T. equinum from and what type of dermatophyte are they?

Back 27

dogs and horses, zoophilic, and they tend to infect beards and hair

Front 28

What etiology is geophilic Tinea capitis in children?

Back 28

M. fulvum

Front 29

Where does Tinea Capitis usually occur?

Back 29

scalp, eyebrows, eyelashes

Front 30

What are the three patterns of fungal invasion of hair?

Back 30

ectothrix (outside), endothrix (inside), favic (root)

Front 31

What type of fungal invasion is shown?

Back 31

Ectothrix

Front 32

What type of fungal invasion is shown?

Back 32

Endothrix

Front 33

What type of fungal invasion is shown?

Back 33

Favic

Front 34

What fungal condition manifests as inflammatory circular lesions, burning sensation, that can occur anywhere excluding scalp, groin, palms and soles?

Back 34

Tinea Corporis (ring-worm)

Front 35

What fungal condition is limited to the bearded areas of the face and neck, is almost exclusive to men, and causes inflammatory, deep plaques?

Back 35

Tinea Barbae

Front 36

What fungal condition results in well demarcated groin and adjacent skin rash that is acutely moist and chronically dry with papular annules? It can occur in both men and women.

Back 36

Tinea Cruris

Front 37

This is the most common dermatophyte and it causes prurtic, scaly soles, painful interdigitary fissures, and rare ulcers or vessicles on the feet?

Back 37

Tinea Pedis

Front 38

What does tinea mean?

Back 38

A discolored ring.... ringworm (general term for cutaneous mycoses)

Front 39

What mycoses manifests as a fungal infection of the nails?

Back 39

Tinea Unguium or Onychomycosis

Front 40

What is the treatment for dermatophytes?

Back 40

Topical antifungal or oral therapy.

Front 41

What is the treatment for cutaneous mycosis?

Back 41

Same thing as dermatophytes: Topical antifungal or oral therapy.