Mycology — MCQs

Q: Which of the following is the causative agent of Favus?

Trichophyton schoenleinii. ***Trichophyton schoenleinii*** - This fungus is the classic causative agent of **Favus**, a severe form of tinea capitis characterized by **sulfur-yellow cup-shaped crusts** called scutula. - Favus often leads to **permanent scarring alopecia** due to follicular destruction. *Microsporum audouinii* - This species is a common cause of **epidemic tinea capitis** in children, particularly in schools. - It typically causes **gray patch tinea capitis**, characterized by scaly patches and broken hairs, but not scutula. *Microsporum canis* - *M. canis* is a **zoophilic fungus**, commonly transmitted to humans from infected cats and dogs. - It is a frequent cause of **inflammatory tinea capitis** and tinea corporis, presenting with scaling, erythema, and occasional pustules. *Trichophyton mentagrophytes* - This dermatophyte can cause various forms of tinea, including **tinea pedis (athlete's foot)**, tinea cruris, and highly inflammatory tinea capitis or barbae. - It is known for causing both **inflammatory and non-inflammatory lesions**, but not specifically Favus.

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Classification of Fungi

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Laboratory Diagnosis of Fungal Infections

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Mycology — MCQs

Mycology — MCQs

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