Bacterial infections

Question 1

How to differentiate between Folliculitis, Furunculus and carbunculus?

Answer 1

• Folliculitis: inflammation around the hair follicles.
• Furunculus: inflammation around the hair follicles with Necrosis.
• Carbunculus: s lot of Furunculus around each other.

Question 2

Complications of Impetigo ?

Answer 2

• Poststreptococcal acute glomerulonephritis. (18-21 days)

- Can be floolwed by scarlet fever, urticaria and erythema multiforme.

Question 3

IMPETIGO, definition and types ?

Answer 3

• Contagious, superficial pyogenic infection of the skin.
• Types: bullous (staphylococcal) and
non-bullous ( streptococcal or mixed).

Question 4

The primary lesion is ecthyma ?

Answer 4

Blister/papule.

Question 5

Staphylococcus aureus infections are ?

Answer 5

I. Skin infections:

a. Impetigo contagiosa
b. Ecthyma
c. Folliculitis
d. Furunculus ( boil) & Furunculosis
e. Carbunculus
f. Sycosis barbae

II. Skin diseases due to bacterial toxins:

a. Staphylococcal scalded skin syndrome
b. Toxic shock syndrome

Question 6

ß-hemolytic streptococcus infections are ?

Answer 6

I.Skin & subcutaneous infection:

a. Impetigo contagiosa ( non bullous)
b. Ecthyma
c. Erysipelas
d. Cellulitis
e. Fasciitis necroticans

Question 7

Cellulitis?

Answer 7

nonnecrotizing inflammation of the skin and subcutaneous tissue.
- No systemic signs of illness and no risk factors for serious disease.

Question 8

In impetigo, children should stay away from school until ?

Answer 8

crusts have dried out.

Question 9

Ulcerative impetigo is called ?

Answer 9

Ecthyma

Question 10

TTT for erythrasma?

Answer 10

• Azole antifungal agents (clotrimazole, miconazole), Erythromycin, antiseptics.
• For more extensive lesions: topical fucidin and oral tetracycline.

Question 11

TTT of impetigo?

Answer 11

• Topical Antibiotics (Mupirocin, fucidic acid and retapamulin)
• Severe, Go orally

Question 12

typical location for Lymphadenosis cutis benigna ?

Answer 12

Face

Question 13

Borrelia burgdorferi is responsible for ?

Answer 13

• Erythema chronicum migrans (ECM)
• Lymphadenosis cutis benigna (LCB)
• Acrodermatitis chronica atrophicans (ACA)

Question 14

impetiginization is ?

Answer 14

Secondary bacterial infection of the skin.

Question 15

Erythrasma is caused by? and what color is the lesions ?

Answer 15

• Corynebacterium minutissimum.

- Orange lesions.

Question 16

First line TTT of erysipelas ?

Answer 16

• Penicillin iv or po. (erythromycin in case of allergy)

- Cefuroxime s.c. also commonly used!!

Question 17

Complications of Furuncle?

Answer 17

Cavernous sinus thrombosis ( rare and dangerous)

Question 18

ERYSIPELAS, most common locations ?

Answer 18

• Mainly affects lower legs, face

Question 19

Complications of of erysipelas ?

Answer 19

• Thrombophlebitis.
• Elephantiasis.
• Skin necrosis.
• Phlegmon.

Question 20

Follicles are destroyed with scarring is called?

Answer 20

Lupoid sycosis.

Question 21

Typical characteristics of erysipelas ?

Answer 21

• Lymphangitis.
• Fever.
• Erythema and swelling.
• Localization on lower extremity.

Question 22

The most useful diagnostic method in Erythrasma is ?

Answer 22

Wood’s lamp.

Question 23

What erythrasma look like under wood’s light?

Answer 23

Coral-red fluorescence, attributable to coproporphyrin III.