More than 90% of patients with atopic dermatitis have colonization of lesional skin with Staphylococcus aureus, and uninvolved skin has colonization of more than

Correct Answer: D

Rationale: Uninvolved skin in atopic dermatitis patients often has over 50% colonization with S. aureus.

Correct Answer: D

Rationale: Choanal atresia is a congenital nasal obstruction that causes cyanosis that worsens with feeding and improves with crying, since crying opens the mouth for breathing. Bilateral atresia requires urgent intervention.

Correct Answer: D

Rationale: Atypical antipsychotics are generally not the first-line treatment for depression in children. Antidepressants are more commonly prescribed for depressive disorders.

Correct Answer: B

Rationale: Tetralogy of Fallot is a congenital heart defect that affects the flow of blood through the heart. In this condition, there is decreased pulmonary blood flow leading to reduced oxygenation of the blood. To compensate for the low oxygen levels in the blood, the body may increase the production of red blood cells, resulting in polycythemia (an increased red blood cell count). This is the body's way of trying to ensure that enough oxygen is carried to the tissues despite the heart defect. Therefore, in a 5-month-old infant with tetralogy of Fallot, the nurse would expect the blood workup to show polycythemia.

Correct Answer: C

Rationale: Severe pain, often in the big toe, is the hallmark symptom of gout due to uric acid crystal deposition.