ATI RN
Pediatric Immunization NCLEX Questions Ricci Questions
Question 1 of 5
A workup on an ill child revealed low levels of complement C3 in her blood. Which one of the following presentations did this child most likely manifest?
Correct Answer: D
Rationale: C3 deficiency impairs opsonization and complement activation, increasing susceptibility to extracellular bacterial infections.
Question 2 of 5
Antigen presenting cells (APCs) are required for T-cell recognition of specific antigen and activation. APCs accomplish this task by presenting antigen in the context of which of the following molecules?
Correct Answer: C
Rationale: APCs present antigens on MHC molecules to T cells.
Question 3 of 5
A 9-month-old boy presented with recurrent attacks of diarrhea, thrush, and failure to thrive shortly after birth. You suspect immune deficiency. Of the following, the MOST common cause of this condition is
Correct Answer: C
Rationale: The symptoms (diarrhea, thrush, failure to thrive) suggest severe combined immunodeficiency (SCID), most commonly due to T-cell defects, which impair both cellular and humoral immunity.
Question 4 of 5
The treatment of choice for a 3-year-old boy with Wiskott-Aldrich syndrome is
Correct Answer: D
Rationale: Bone marrow or cord blood transplantation is curative for WAS, correcting the underlying genetic defect affecting immunity, platelets, and eczema.
Question 5 of 5
Chronic neutropenia may be induced by
Correct Answer: C
Rationale: Cytomegalovirus can cause prolonged bone marrow suppression, leading to chronic neutropenia, unlike the others, which typically cause transient effects.