In vivo skin testing for allergen-specific IgE involves a wheal and flare reaction measured after

Correct Answer: A

Rationale: Skin prick testing results are typically read within 15 to 20 minutes, allowing for immediate diagnosis of allergic sensitivities.

Correct Answer: A

Rationale: Many developing countries struggle with providing access to clean water, which affects public health and economic productivity.

Correct Answer: B

Rationale: Gastroschisis is a congenital defect where the intestines protrude through the abdominal wall without a covering sac, increasing the risk of infection and dehydration. It requires surgical repair soon after birth.

Correct Answer: C

Rationale: Exfoliative dermatitis in atopic dermatitis patients can be due to superinfection, with Herpes simplex virus being a common cause (eczema herpeticum). It presents as widespread vesicular eruptions, requiring antiviral treatment to prevent complications like systemic dissemination.

Correct Answer: C

Rationale: Galactosemia does not typically cause hyperinsulinemic hypoglycemia

Correct Answer: B

Rationale: Persistent allergic rhinitis is characterized by more frequent and troublesome symptoms that impact daily life, distinguishing it from intermittent cases, which occur less frequently.

Correct Answer: B

Rationale: Asthma is a TH2-mediated inflammatory condition where eosinophils play a key role in airway hyperresponsiveness. Increased IgE, not IgA, is associated with allergic asthma, and viral infections can trigger but do not cause asthma.

Correct Answer: A

Rationale: Second-generation H1 antihistamines are first-line for chronic urticaria due to their efficacy and fewer side effects.

Correct Answer: A

Rationale: Epinephrine is the first-line treatment for anaphylaxis, which is the most likely diagnosis given the symptoms.