W2L1 Parasitic Skin Inf

Question 1

Parasitic Skin Diseases? (2)

Answer 1

• Scabies
• Pediculosis

Question 2

Def Scabies?

Answer 2

Contagious dis caused by Sarcoptes Scabii which invade epidermis forming a burrow

Question 3

MOI Scabies?

Answer 3

-Direct: Patient, Animal
-Indirect: Bed, Towels, Clothes

Question 4

C/P Scabies? (5)

Answer 4

• I.P.: 2w-2m
• Burrow : Pathognomonic
• Severe itching, more by night
• Polymorphic lesions
• Sites : characteristic

Question 5

Clinical Types of Scabies? (9)

Answer 5

1. Human classic type
2. Animal scabies:
   -Short I.P
   -Self limited
   -Webs & genitalia are free
   -Lesions: absent burrow
   -Not transmitted from man to man
3. Scabies in infants and young children
4. Scabies incognito (steroids)
5. Scabies in clean
6. Scabies in bed ridden
7. Venereal scabies
8. Norwegian scabies
9. Nodular scabies

Question 6

Diagnosis of scabies? (5) IF CPD

Answer 6

1. Severe itching
2. > 1 member of fam
3. Classical distribution
4. Polymorphic eruption
5. Demonstration of mite

Question 7

Complications of Scabies? (3) BAE

Answer 7

• Bacterial inf
• Eczema
• Acarophobia

Question 8

D.D Scabies? (3) PEE

Answer 8

• Papular urticaria
• Eczema
• Erythema multiforme

Question 9

Treatment of scabies?

Answer 9

A) General : Disinfection ,ttt of fam

B) Topical :
-G.B.H 1% -Benzyl benzoate 25%
-Sulfur 5%,10% -Crotamiton 10% -Permetherin 5%

C) Systemic :
-Antihistamine -Antibiotic
-Antiscabetic: Ivermectin (1tab (6mg)\15kg)
-Nodular scabies: I.L steroids, Excision

Question 10

Causes of persistent itching after treatment Scabies? (5) URAPI

Answer 10

• Persistence of hypersensitivity state
• Unsuccessful ttt.
• Irritation by antiscabetic
• Acarophobia
• Reinfection

Question 11

Type of Pediculosis? (3)

Answer 11

• Pediculosis Capitis
• Pediculosis Corporis
• Pediculosis Pubis

Question 12

Treatment of Pediculosis Capitis?

Answer 12

• Ttt infection: cotrimoxazole
• Pediculocides:
- G.B.H.1% shampoo - Ivermectin lotion - Malathion 0.5%.

Question 13

Def Urticaria?

Answer 13

Skin disorders char by formation of wheals

Question 14

Causes Urticaria? (10)

Answer 14

•Food •Drugs •Infection •Inhalants
•Collagen Dis. •Neoplasms •Medical Dis.
•Phy factors •Psychogenic •Idiopathic

Question 15

C/P Urticaria?

Answer 15

A) Wheal:
• Evanescent
• Itchy
• Variable: size, shape, site.

B) GIT :
Nausea, Vomiting, Dysphagia

C) Resp. T. :
Horseness, Wheezing, Dyspnea

Question 16

Special Types of Urticaria? (8)

Answer 16

•Angiodema •Dermographism
•Cold urticaria •Aquagenic •Cholinergic •Solar urticaria •Contact urticaria
•Serum sickness

Question 17

Treatment of Urticaria? (6)

Answer 17

• Removal of cause
• Adrenaline
• Antihistamines
• Ca gluconate
• Systemic steroids
• Calamine lotion

Question 18

Def Papular Urticaria?

Answer 18

Hypersensitivity reaction to insect bites (fleas & mosquitoes)

Question 19

C/P Papular Urticaria?

Answer 19

• Infants and children
• Lesion :
- Itchy erythematous oedematous
- Papules w/wo vesicles
- 2ry inf
• Sites : Limbs ± trunk

Question 20

Course of Papular Urticaria? (2)

Answer 20

• Resolution
• Prurigo of Hebra ( Atopic )

Question 21

Diagnosis of atopic dermatitis?

Answer 21

Three of 4 major criteria:
1- Pruritis
2- Typical morpho & distrib of age group
3- Chronic/chronically relapsing dermatitis
4- Personal/fam history of atopy

Question 22

Treatment of papular urticaria?

Answer 22

General :
• Disinfestation .
• Change the environment .

Drugs :
• Antihistamine .
• Steroids ± Antibiotics