6. Skin, Muscle and Bone Infections-1

Question 1

A 31 year old man goes to his doctor with complaints of lose of vision. Physical examination show a man with marcuolpapular rash and also complaints of itchy skin. His travel history is positive for travel to west Africa. Skin snips are taken and after a day microfilariae are seen swimming. What source of transmission?

A. Sexual Contact 
B. Black fly 
C. Sheep 
D Ingestion 
E. Opportunistic 

RFA

Answer 1

Ans.B Black Fly- the patient has Onchocera volvus

Question 2

A 32 year old woman with HIV comes to her doctor for a check up. During physical examination it is noticed that there are well-demarcated hypopigmented spots along her back and arms. The doctor shines
a woods lamp light at the spots and they turn blueish white. What is true of the casual agent?

A. Produces TTST-1
B. Produces compounds that inhibit tyrosinase 
C. Is a gram positive bacillus 
D. Produces endospores
E. Is a gram negative cocci 

RFA

Answer 2

Ans. B. M. furfur fits the descriptions and it produces compounds that inhibit tyrosinase

A- would be S. Aureus

C.- Cornybacterium is a gram positive bacillus but turn coral red under woods lamp

D. Anthrax produces endospores

E. Staphs and Streps are gram negative cocci