MD MD - Doctor of Medicine Dermatology and Skin Disorders Questions and Answers 2

Question 1

Acne vulgaris is primarily caused by which organism?

Accepted Answer

Cutibacterium acnes

Answer

Staphylococcus aureus

Answer

Streptococcus pyogenes

Answer

Malassezia furfur

Question 2

Which topical agent is considered first-line for mild-to-moderate acne vulgaris?

Accepted Answer

Benzoyl peroxide

Answer

Isotretinoin

Answer

Oral tetracycline

Answer

Triamcinolone

Question 3

Tinea versicolor (pityriasis versicolor) is caused by which organism?

Accepted Answer

Malassezia furfur

Answer

Candida albicans

Answer

Trichophyton rubrum

Answer

Epidermophyton floccosum

Question 4

Allergic contact dermatitis is a type IV hypersensitivity reaction mediated by:

Accepted Answer

T lymphocytes (delayed-type)

Answer

IgE antibodies and mast cells

Answer

IgG antibodies and complement

Answer

Neutrophil infiltration

Question 5

Which classic description applies to varicella (chickenpox) skin lesions?

Accepted Answer

Dew drops on a rose petal

Answer

Honey-colored crusted vesicles

Answer

Target lesions with central clearing

Answer

Silvery-scaled papules on elbows

Question 6

First-line topical treatment for scabies in adults is:

Accepted Answer

Permethrin 5% cream

Answer

Lindane 1% lotion

Answer

Benzyl benzoate 25%

Answer

Ivermectin oral