Hand foot mouth disease is characterized by –
**Core Concept**
Hand-foot-and-mouth disease (HFMD) is a common viral infection primarily affecting infants and young children, characterized by a distinctive rash on the hands and feet, along with sores in the mouth. The condition is caused by viral pathogens, most commonly Coxsackievirus A and Enterovirus 71. The infection is highly contagious and spreads through direct contact or contaminated surfaces.
**Why the Correct Answer is Right**
HFMD is characterized by a distinctive rash that typically affects the palms of the hands, soles of the feet, and buttocks, in addition to the oral mucosa. The rash is usually flat, red, and may be accompanied by small blisters or ulcers. The oral manifestations of HFMD include painful sores or ulcers on the tongue, gums, and the inside of the cheeks. The exact mechanism of the rash and oral lesions is not fully understood, but it is thought to be related to the viral infection of epithelial cells.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as HFMD is not primarily characterized by a rash on the trunk or limbs.
**Option B:** This option is incorrect as HFMD is not typically associated with a high fever or systemic symptoms.
**Option C:** This option is incorrect as HFMD is not primarily characterized by a rash on the face or scalp.
**Clinical Pearl / High-Yield Fact**
HFMD is highly contagious and can spread quickly in childcare settings or households with multiple children. Good hygiene practices, such as frequent handwashing and proper disposal of soiled diapers, can help prevent the spread of the disease.
**Correct Answer: D. Oral and cutaneous lesions**