A Patient's Total IgG Is in the Normal Range,but He

question 7

Multiple Choice

A patient's total IgG is in the normal range,but he suffers from recurrent infections with encapsulated bacteria such as Streptococcus pneumoniae and Haemophilus influenza.T-cell functions are all normal.What is the most likely cause of the infections?

• A) Tyrosine kinase deficiency
• B) Common variable immunodeficiency
• C) IgG subclass deficiency
• D) Selective IgA deficiency

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Definitions:

Elemental Metals

These are pure chemical substances consisting of a single type of atom that exhibits metallic properties such as conductivity, malleability, and luster.

Tungsten

A chemical element with the symbol W and atomic number 74, known for its high melting point and strength when alloyed.

Molybdenum

A silvery-white, hard metal used in steel alloys to increase strength, hardness, and resistance to corrosion.

Metalloids

Elements with properties that are intermediate between metals and nonmetals.