Correct Answer - A Ans. is 'a' i.e., Keratin Dermatophytes a | Dermatology

Correct Answer - A
Ans. is 'a' i.e., Keratin
Dermatophytes are keratinophillic fungi, living only on the superficial
dead keratin. That is why they infect skin, hair and nail. In skin they
infect most superficial layer of the epidermis i.e. stratum corneum.
They do not penetrate living tissues. Dermatophytes cause a variety
of clinical conditions, collectively known as dermatophytosis, tinea or
ringworm. Dermatophytes have been classified into 3 genera :-
trichophyton, microsporum, epidermophyton.
1. Trichophyton affects;- skin, hair, nails
2. Microsporum affects ;- skin, hair (nails are not affected)
3. Epidermophyton affects:- skin, nails (hair are not affected)
Deep fungal infections (eg:- maycetoma, chromoblastomycosis,
pheohyphomycosis, sporotrichosis, lobomycosis, rhinosporidiosis)
involve subcutaneous tissue.
Dermatophytosis is itchy and scaly

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