Final answer:
Atopic dermatitis commonly affects the face of infants. It is characterized by red, scaly, and itchy skin lesions, typically treated with moisturizers and corticosteroid creams. Oral and parenteral routes are appropriate for home antimicrobial treatment of systemic infections.
Step-by-step explanation:
A common site for atopic dermatitis in an infant is B. the face. Atopic dermatitis, also known as eczema, typically presents in infants with red, scaly, and itchy lesions that often appear on the cheeks, forehead, and scalp. It is less common in the diaper area because the moisture and occlusion from diapers tend to prevent this kind of dry, scaly dermatitis. The condition is a chronic skin disease characterized by inflammatory lesions that come and go over time. Treatment typically focuses on reducing skin inflammation and relieving itching with a variety of measures including moisturizers and corticosteroid creams.
For example, chickenpox is a common childhood disease caused by the varicella-zoster virus, which also involves skin lesions. However, unlike atopic dermatitis, chickenpox lesions are pustular and more commonly found on the trunk.
When treating a systemic infection with an antimicrobial at home, the appropriate and convenient routes of administration include A. oral and D. parenteral routes. Oral administration involves taking medication by mouth, while parenteral administration involves injecting the medication through routes other than the digestive tract, such as intravenous injection. Topical application is generally not suitable for systemic infections as it does not reach the entire body.