Dermatologic Infections and Infestations Flashcards Preview

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Flashcards in Dermatologic Infections and Infestations Deck (32):
1

Impetigo is _______.

a superficial bacterial infection of the skin

2

Honey-colored crust, lymphadenopathy, and post-streptococcal glomerulonephritis are associated with ______.

streptococcal non-bullous impetigo

3

Streptococcal impetigo is more common in _______, while staphylococcal impetigo is more common in ______.

children; adults

4

What are risk factors for cellulitis?

Being very young, very old, immunocompromised, an IV drug user, or having chronic ulcers

5

_________ can cause cellulitis in children.

Haemophilus influenzae

6

Erysipelas presents as _________.

raised, erythematous plaques on the face; caused by infection

7

Cellulitis presents with _________.

variable lymphadenopathy and common lymphatic streaking`

8

Dermatophytes eat _______.

keratin

9

What two areas does epidermophyton commonly affect?

The groin and the feet

10

Microsporum ________ under light.

fluoresces

11

_______ is the most common fungus.

Trichophyton

12

"Ringworm" is _______. It is caused by ______

tinea; fungi moving outward in a radius to get to healthy, keratinizing tissue

13

Occipital lymphadenopathy is associated with __________.

tinea capitis

14

Tinea capitis can be either _________.

gray patches or black dots

15

Kerions are _________.

fungal infections with lots of inflammation and edema -- requires systemic anti-fungal treatment

16

If you treat fungal infections with steroids, then you get _________.

Majocchi's granuloma: a fungal infections of the hair follicles

17

Tinea manum is usually __________.

unilateral

18

KOH is used to _________.

test for fungi; a positive test will have visible hyphae

19

Subungual fungal infections must be treated with __________.

systemic anti-fungals

20

________ is a normal fungal organism. The most common pathogenic species is ______.

Candida; candida albicans

21

Unlike dermatophytes, which eat keratin, candida fungi eat _______.

glucose

22

Common sites of candida infection include __________.

the back of the throat (oral thrush), labial commisures, diaper area, and in between the digits

23

Candida hyphae are _______ than dermatophyte hyphae.

plumber and less septate

24

Tinea versicolor is caused by _________, a fungus that metabolizes _______.

Malassezia furfur; lipids

25

Tinea versicolor is confined to ______ patients.

post-pubertal

26

Scabies only pass _________.

through person-to-person contact (highest prevalence in children and sexually active adults)

27

Scabies presents as ___________.

itchiness in flexural areas and soft-skin areas;

28

Patients who do not have a good immune system or who cannot itch get ________.

Norwegian scabies (because itching is actually good to treat scabies)

29

Mite feces are called ________.

scybala

30

Body lice are commonly found on _________.

clothing, because they do not adhere to body hair

31

List the five major anti-microbial peptides produced by the skin.

Alpha-defensins, beta-defensins, cathelicidins, RNase7, and psoriasin

32

Staphylococcus aureus can cause _________ impetigo.

bullous and non-bullous

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