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Flashcards in Mycology 2 Deck (36):
1

Fungal parasites of keratinized epithelium of skin and nails

Dermatophytes

2

Superficial mycosis

Ringworm or tinea

3

Non-invasive, superficial infections

Dermatophytes

4

Zoonotic, highly contagious due to _____

Arthrospores

5

Predispositions to dermatophyte infection

Youth, poor nutrition, high humidity, rubbing, low UV light

6

Humans are reservoirs for _____ dermatophytes

Anthropophilic

7

Animals are reservoirs for _____ dermatophytes

Zoophilic

8

Soil or or other environmental spaces are reservoirs for _____ dermatophytes

Geophilic

9

Slowly expanding, circular area of alopecia and desquamated epithelium

Ringworm

10

Central hair regrowth, inflamed edge

Ringworm

11

Diseased part is the periphery of the lesion

Ringworm

12

Trichophyton verrucosum

Cattle ringworm

13

Cats are asymptomatic carriers of _____ infections

Microsporum canis

14

Trichophyton equinum

Horse ringworm

15

Microsporum nanum

Pig ringworm

16

Microsporum canis, audouinii, gypsium

Dog, cat, human ringworm

17

Trichophyton with a wide host range

T. mentagrophytes

18

Subcutaneous nodule caused by M. canis in Persian cats

Pseudomycetoma

19

How are humans infected by M. canis?

Contact between children and cats

20

Fluorescence method used for dectecting M. canis infections

Woods lamp

21

Why are closed tubes not recommended for dermatophyte specimen storage?

Retain moisture resulting in overgrowth of bacteria

22

Where will you see dermatophyte spores in a direct examination of broken hairs?

Inside or outside the hair follicle

23

Ectothrix

Outside the hair follicle

24

Endothrix

Inside the hair follicle

25

Arthroconidia

Spores of dermatophytes

26

Microsporum gallinae

Avian ringworm or favus

27

Affects comb, wattles, or feather follicles

M. gallinae

28

What is the goal of ringworm treatment?

Minimize discomfort, progression, and spread

29

Acts only against dermatophytes (not spores) via oral administration

Griseofulvin

30

Inhibits fungal DNA sythesis

Griseofulvin

31

Human dermatophytes include _____

Athlete's foot, jock itch, tinea

32

Lipophilic yeasts

Malassezia spp.

33

Cause superficial moist dermatitis

Malassezia spp.

34

Can cause otitis externa

Malassezia spp.

35

Mycoses

Superficial fungal infections

36

What are two examples of Malassezia spp?

M. pachydermatis, M. furfur