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Use the following information to answer question 1 and 2.
A6-year-old girl was taken to the physician for evaluation of
aslowly growing bump on the back of her head. The bump was a
raised,scaling lesion 4 cm in diameter. Wood's lamp examination of
thescalp showed fluorescence. A fungal culture of material from
thelesion was positive for a fungus with numerous
microconidia.
1. The girls disease was
a. rubella
b. candidiasis
c. dermatomycosis
d. a cold sore
e. none of the above
2. Besides the scalp, this disease can occur on all of
thefollowing except
a. feet
b. nails
c. the groin.
d. subcutaneous tissue
e. none of the above.

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Iqta

Answer:

The answers are as follows:

  1. c. dermatomycosis
  2. d. subcutaneous tissue

Explanation:

Before we go into the details of dermatomycosis, lets eliminate the incorrect options:

1.

a. Rubella is a viral disease caused by the rubella virus. Therefore, the etiological agents of both are entirely different.

b. Candidiasis is a fungal infection but it is caused by the yeast, Candida albicans which results in oral and vaginal thrush.

d. Cold sores are again, a symptom of a viral disease, herpes simplex caused by the virus, HSV-1.

Dermatomycosis:

  • Dermatomycosis is caused by the fungi dermatophytes that cause cutaneous infections of the skin, nails and hair. These fungi grow on the epidermal layer of nails and skin.

2.

As mentioned above, fungi that cause dermatophytes only grow on the epidermis, therefore, they cannot cause infections in the subcutaneous tissue.

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