Parasites and Insect bites

Question 1

What is the etiology, presentation, diagnosis, and Tx for Pediculosis?

Answer 1

etiology: lice
presentation:
-pediculosis humanus capitis: head lice-pruritis on scalp
-pediculosis corporis: body lice - mainly homeless, pruritus and excoriations on trunk and neck, Nits found in seams of clothing
-pediculosis pubis: pubic lice - STI
Dx: ID of adult lice and nits
Tx: permethrin, hot water for clothing

Question 2

What is the etiology, presentation, diagnosis, and Tx for papular urticaria?

Answer 2

etiology: arthropod bites, allergic hypersensitivity. Fleas, bedbugs
presentation: pruritic, urticarial papules
- fleas
- bed bugs: groups of three
- mosquitos

Question 3

What is the etiology, presentation, diagnosis, and Tx for scabies?

Answer 3

etiology: scabies mites
presentation: intense itching at night, slightly elevated, pinkish white, commonly in webbed spaces of fingers, flexor surfaces, scrotum, areolae
Dx: skin scrapings, ID mites and eggs
Tx: Wash beddings, pesticide

Question 4

What is the etiology, presentation, diagnosis, and Tx for cutaneous larva migrans (creeping eruption)?

Answer 4

etiology: hookworm
presentation: erythematous, pruritic, cutaneous eruption
tx: antihelmintics