Download ETAS MCQs ebook Pdf

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Download ETAS MCQs ebook Pdf

Download ETAS MCQs ebook Pdf

This HPV strain is responsible for Bushke-Lowenstein tumor and also for anogenital warts:
A. HPV 6, 11
B. HPV 1
C. HPV 2, 4
D. HPV 3, 10
E. HPV 7
► A
Anogenital and Buschke-Lowentein tumor is caused by HPV 6 and 11. HPV 1 is from
palmoplantar warts. HPV 2, 4 causes common warts HPV 7 causes Butcher’s warts.
2
The causative organism that is responsible for pitted keratolysis is:
A. Micrococcus sedentarius
B. Streptobacillus moniliformis
C. Klebsiella pneumonia
D. Neisseria meningitides
E. Burkholderia mallei
► A
Pitted keratolysis is caused by Micrococcus sedentarius. The clinical features are shallow 1-3mm
pits on plantar surface of feet. The treatment is topical erythromycin, clindamycin, or benzoyl
peroxide.
3
Most common causative agent for the lesion shown in this 5-year old child is
A. Staphylococcus aureus
B. group A β-hemolytic streptococci
C. Pseuomonas
D. kleibsiella
E. H.influenza
► A
The picture shown is Impetigo, which is a common, contagious superficial skin infection caused
most commonly by staphylococci. Although seen in all age groups, the disease is most common
in infants and children. Lesions may involve any body surface but occur most frequently on the exposed parts of the body, especially the face, hands, neck, and extremities. There are two classic
forms of impetigo, bullous and nonbullous. Nonbullous impetigo accounts for more than 70% of
cases. Historically was caused primarily by group A β-hemolytic streptococci (GABHS), but
now appears to be most commonly caused by S. aureus. Anaerobic organisms may also be
recovered from lesions of nonbullous impetigo. (Reference: Brook I, Frazier EH, Yeager JK.
Microbiology of nonbullous impetigo. Pediatr Dermatol 1997;14(3):192-195.)
4
A 4 year-old boy is diagnosed with Staphylococcal Scalded-Skin Syndrome. Vesiculation in this
disease is secondary to exfoliative toxins binding what target protein?
A. Plectin
B. Bullous pemphigoid antigen 2
C. Bullous Pemphigoid antigen 1
D. Desmoglein 3
E. Desmoglein 1
► E
Staphylococcus Scalded-Skin Syndrome (SSSS) is caused by Staphylococcus exfoliative toxins
A and B binding desmoglein 1. This results in the intraepidermal split at the granular layer seen
in this illness. Targeting of desmoglein 3 would result in a suprabasilar split. Targeting of
plectin, BPAG1, or BPAG2 would result in a subepidermal split. This is not seen in SSSS.
5

Tick-borne Relapsing Fever is caused by:
A. B. burgdorferi
B. B. recurrentis
C. B. duttonii
D. B. henselae
E. B. bacilliformis
► C
Relapsing Fever can be either Louse-borne or Tick-borne. Tick-borne Relapsing Fever is caused
by B. duttonii or B. hermsi, while Louse-borne Relapsing Fever is caused by B. recurrentis.
6
Staphylococcal scalded skin syndrome is caused by exfoliative toxins binding to:
A. Desmoglein-1
B. Desmokolin-1
C. TSST-1
D. Laminin-5

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