Impetigo is characterized by crusting sores and spread by autoinoculation.

• A. Folliculitis
• B. Sty
• C. Acne
• D. Impetigo

Answer: (D)

Impetigo is a highly contagious, superficial skin infection that presents with crusted sores, often forming honey-colored crusts. It spreads easily by autoinoculation, meaning bacteria from the lesions or from nasal carriers can be transferred to other parts of the skin or to others through touching, scratching, or shared items. Other conditions described, like folliculitis (infection of hair follicles), a sty (eyelid infection), or acne (a pilosebaceous condition with comedones and inflammatory lesions), do not characteristically produce the crusted, spreading lesions seen with impetigo. The combination of crusted sores and the pattern of self-spread fits impetigo best.