Wk18D1 Rashes

Question 1

Measles Diagnosis

Fever is ___ to rash

Answer 1

3 C’s + K (cough, coryza, conjunctivitis, Koplik’s spots), Morbilliform rash
prior

Question 2

Rubella (German measles) diagnosis and rash characteristics
Duration?
Is it bad?

Answer 2

Macular rash (face/neck, then spreads)
3-5 days
little systemic illness

Question 3

Varicella (chickenpox) diagnosis
Rash characteristics
Recurs later as __ with __ characteristics

Answer 3

Disseminated vesicular rash after 12-14d incubation
Begins face/trunk, spreads
Herpes zoster (Shingles), dermatomal distribution and acute neuritis

Question 4

Roseola (erythema subitum) diagnosis
Viruses
Transmission

Answer 4

3-5d fever, evanescent macular rash .5-2 yr old
HHV-6/7
parent’s kisses

Question 5

Fifth disease (erythema infectiousum)
Virus
Timing of illness/rash
rash appearance
dangerous for...
weird manifestation

Answer 5

Parvo B19
1 d illness, rash after 16-20 d
macular cheek rash
pregnant moms, chronic hemolytic anemia patients
purpuric gloves and socks

Question 6

Enterovirus rashes: seasons
Can look like \_\_\_
Hand foot + mouth 
herpangina, 
molluscum contagiosum

Answer 6

Circulate in summer/fall
anything!
Oral vesicular enanthem
Oral vesicles w/ red areolae, ulcers
Umbillicated papules on trunk

Question 7

Rashes from Bacterial Infections
Erythema migrans
Bacterial vasculitis
Scarlet fever

Answer 7

Borrelia burgdorferi (target)
N. meningitidis, rickettsia form petechiae (systemic)
GAS,Erythmatous macular rash, fine sandpaper feel

Question 8

3 Most common dermatophytoses
Prefer \_\_\_
Tinea corporis
Tinea capitis
Tinea cruris, pedis
Tinea unguium

Answer 8

Microsporum, trichophyton, epidermophyton
keratin
smooth skin:ringworm, raised scaly edge, vesicles?
scalp: Adamson’s fringe, kerion
jock itch, athlete’s foot
nails, chronic

Question 9

Diagnosis of dermatophyte infection can be through ___ prep (maybe with __ to see __) or alternatively with ___ or __

Answer 9

KOH prep with calcifluor white to see chitin

Woods lamp or culture

Question 10

Pityriasis versicolor agent
looks __ or ___ (grossly)
characteristic appearance in culture

Answer 10

Malassezia
hypo-hyperpigmentation
spaghetti and meatballs

Question 11

Erythrasma agent
Areas affected
Rash appearance
Diagnosis uses ___ to differentiate from ___

Answer 11

Corynebacterium minitissimum
Intertriginous areas
Red/brown, macular
Wood’s lamp (coral red), Tinea cruris

Question 12

Sporotrichosis (rose-handler’s disease)
Agent
Forms subQ ___ that ____ on skin
Look at 37 C culture

Answer 12

Sporothrix schenckii fungus
movable module, suppurates
Cigar shape