ATI RN
Pediatric Immunization Practice Questions Questions
Question 1 of 5
Matching: Complement deficiency - Lupus-like syndrome
Correct Answer: C
Rationale: C1q deficiency is strongly associated with a lupus-like syndrome due to impaired clearance of immune complexes, leading to autoimmunity. C3 deficiency causes severe bacterial infections, C5-9 deficiencies lead to neisserial infections, and C1 inhibitor deficiency causes angioedema, not lupus-like features.
Question 2 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 3 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 4 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.
Question 5 of 5
An 18-month-old male child presented with failure to thrive and chronic diarrhea. On examination he has dermatitis, generalized lymphadenopathy, hepatosplenomegaly, and deep seated infection in the inguinal area. His lab. investigations revealed anemia and hypergammaglobulinemia. Of the following, the MOST likely diagnosis is
Correct Answer: D
Rationale: Chronic granulomatous disease causes failure to thrive, deep infections, and hypergammaglobulinemia due to defective phagocyte killing.