8Q: about dermatophytosis all are true except ?
a. trichophyton affects the skin , hair and nails
b. candida is known to cause only systemic infection only
c. epidermophyton affects the skin and nails
d. microsporum affects the skin and hair
answer : b . candida albicans causes many local lesions like oral thrush,vaginitis etc .
well , the first thing u have to know is
Q: what is dermatophytosis ?
Answer : superficial fungal infections are called dermatophytosis .
Q: what are dermatophytes ?
Answer: the organisms that cause dermatophytosis are called dermatophytes .
--- so lets know a few dermatophytes
Q: what are the most important dermatophyte infections and what part do they affect?
Answer : 1. Microsporum : affects skin and hair (MSH)
2. Epidermophyton : affects skin and nails (ESN)
3. Trichophyton : affects skin , hair and nails (tri = for 3)(TSHN)
Skin is involved in all the three cases .
FAMCQ ( frequently asked mcqs) from this topic are
Q: what is the dermatophyte that does not involve the hair ?
--- this question can also be asked as
Q: what is the dermatophyte that does not cause tinea capitis ?
Answer : epidermophyton
--- then u must know
Q; what is the organism that most commonly causes tinea capitis ( superficial fungal infection of scalp,eyebrows etc )?
Answer : trichophyton tonsurans followed by trichophyton rubrum and then trichophyton violaceum .
Q: what is the dermatophyte that does not involve nails ?
Answer : microsporum
--- another disease related to this dermatophytes is Tinea mannum, a question regarding this is
Q: fungal dermatitis of hands is called ?
Answer : tinea manum (remember manicure)
Q: most common agent causing tinea manum?
Answer : trichophyton rubrum.
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