The eye is a common target of allergic disorders because of its marked vascularity and direct contact with allergens in the environment. Of the following, the MOST immunologically active tissue of the external eye is

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Question 1 of 5

The eye is a common target of allergic disorders because of its marked vascularity and direct contact with allergens in the environment. Of the following, the MOST immunologically active tissue of the external eye is

Correct Answer: A

Rationale: The conjunctiva has the highest immune activity in the external eye due to its rich supply of immune cells, including mast cells and lymphocytes, which mediate allergic responses.

Question 2 of 5

Which of the following clinical scenarios would most increase your degree of suspicion for bacterial endocarditis in a child?

Correct Answer: A

Rationale: Fever, new cardiac murmur, and splenomegaly strongly suggest bacterial endocarditis, a condition characterized by systemic infection and cardiac involvement.

Question 3 of 5

Which of the following is the most common cause of early-onset neonatal sepsis?

Correct Answer: D

Rationale: Group B Streptococcus (GBS) is the leading cause of early-onset neonatal sepsis, typically acquired during birth from colonized maternal genital tracts. Prevention includes maternal intrapartum antibiotic prophylaxis.

Question 4 of 5

A 1-year-old child (10 kg) presents with urticaria and wheeze after eating peanut butter. What is the correct management?

Correct Answer: A

Rationale: For anaphylaxis, intramuscular (IM) adrenaline at 0.01 mg/kg (1:1000) is the recommended treatment, equating to 0.1 mL for a 10 kg child.

Question 5 of 5

One of the following causes of anemia is associated with macrocytosis:

Correct Answer: A

Rationale: Folic acid deficiency causes macrocytic anemia due to impaired DNA synthesis, leading to the production of large, immature red blood cells.

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