ATI RN
Pediatric Immunization NCLEX Questions Ricci Questions
Question 1 of 5
An epitope...?
Correct Answer: A
Rationale: An epitope is the specific region on an antigen recognized and bound by an antibody.
Question 2 of 5
Matching: Immunodeficiency - May be confused with AIDS
Correct Answer: D
Rationale: CD8 lymphocytopenia can mimic AIDS due to low CD8 T-cell counts, leading to opportunistic infections similar to HIV.
Question 3 of 5
A child is found to have a normal WBC count but serum concentrations of IgG, IgA, IgM, and IgE below the 95% lower limits for age. Which is the most likely diagnosis?
Correct Answer: D
Rationale: Common variable immunodeficiency (CVID) is characterized by low levels of multiple immunoglobulin classes (IgG, IgA, IgM) with normal WBC, often presenting later in childhood.
Question 4 of 5
A 4-month-old female presents with diarrhea and malabsorption, and on initial laboratory testing has a WBC count of 900/mm³. Which of the following is the most likely diagnosis?
Correct Answer: D
Rationale: Severe combined immunodeficiency (SCID) presents with severe lymphopenia (WBC 900) and early infections or failure to thrive, like diarrhea, due to absent T and B cell function.
Question 5 of 5
Selective IgA deficiency is defined as serum IgA levels less than 10 mg/dL with normal levels of other immunoglobulins. The diagnosis cannot be confirmed until the patient is at least
Correct Answer: B
Rationale: IgA levels may not fully mature until after infancy, so diagnosis is typically confirmed after 4 years of age when levels should stabilize.