Infectious Rashes

Question 1

Maculopapular rash that spreads centripetally toward trunk, includes palms and soles, and becomes petechial over time

Answer 1

RMSF

Question 2

Maculopapular rash that starts on trunk, spreads toward extremities and involves palms and soles

Answer 2

Secondary syphilis

Question 3

Intensely pruritic, migrating, serpiginous (NOT linear) reddish-brown tracks

Answer 3

Cutaneous larva migrans (hookworm larvae) from dog or cat

From walking barefoot on contaminated soil or sand
Tx: ivermectin

Question 4

Intensely pruritic, linear, vesicular (or plaque or bullous) lesions

Answer 4

Urushiol (poison ivy/oak/sumac)