ATI RN
Pediatric Immunization Practice Questions Questions
Question 1 of 5
Mature naive B cells...?
Correct Answer: B
Rationale: Mature naive B cells co-express IgM and IgD on their surface, preparing them to respond to antigens.
Question 2 of 5
Matching: Immunodeficiency - Most severe of congenital immunodeficiencies
Correct Answer: B
Rationale: SCID is the most severe congenital immunodeficiency, with absent T and B cell function, leading to early, life-threatening infections.
Question 3 of 5
Which is the most common defined immunodeficiency disorder?
Correct Answer: B
Rationale: Selective IgA deficiency is the most common primary immunodeficiency, often asymptomatic but can lead to recurrent infections or allergies.
Question 4 of 5
Which of the following is not associated with neutropenia?
Correct Answer: A
Rationale: Leukocyte adhesion deficiency (LAD) causes leukocytosis, not neutropenia, due to impaired neutrophil migration, unlike the other conditions.
Question 5 of 5
A 13-month-old male presented with vomiting, fever, and irritability. On examination his temperature was 40°C, lethargic, with atrophied tonsils, clear tympanic membrane, clear chest and neck stiffness. The parents gave past history of pneumonia at the age of 6 and 9 months for which he was admitted to hospital and treated with i.v. antibiotics for 10 days. Of the following, the MOST likely diagnosis is
Correct Answer: A
Rationale: Recurrent bacterial infections and absent tonsils suggest agammaglobulinemia, likely X-linked, due to severe B-cell deficiency.