The nurse is caring for an infant suspected of having severe combined immunodeficiency (SCID). Which diagnostic test should the nurse anticipate being prescribed for the infant?

Explanation: The correct answer is c. X-linked agammaglobulinemia. This disorder primarily affects males and is caused by mutations in the BTK gene, resulting in a lack of mature B cells and immunoglobulins.

Incorrect choices:

a. Selective IgA deficiency is a primary immunodeficiency disorder characterized by a deficiency of immunoglobulin A (IgA), and it can affect both males and females.

b. DiGeorge syndrome is caused by a chromosome 22 deletion and is not inherited in an X-linked recessive pattern.

d. Severe combined immunodeficiency (SCID) is a group of disorders that can be inherited in various patterns, including autosomal recessive, autosomal dominant, or X-linked recessive. SCID affects both males and females and results in a severe deficiency of T cells, B cells, and natural killer (NK) cells.

Explanation: The correct answer is c. Autoimmune diseases are a potential complication of primary immunodeficiency disorders. When the immune system is deficient or dysfunctional, it may fail to distinguish between self and non-self antigens, leading to the development of autoimmune diseases.

Incorrect choices:

a. Hypertension is a condition characterized by high blood pressure and is not directly related to primary immunodeficiency disorders.

b. Chronic fatigue syndrome is a complex disorder with unknown causes and is not directly related to primary immunodeficiency disorders.

d. Diabetes mellitus is a metabolic disorder caused by insufficient insulin production or insulin resistance and is not directly related to primary immunodeficiency disorders.