A 9-month-old infant is seen by a physician due to a persistent skin infection.His white and red blood cell counts are normal.However,immunofixation electrophoresis indicates a low level of IgG.When the infant returns to the physician for a follow-up visit in a month,his IgG level has increased.What condition do these results indicate?

Question

Quizplus · Accepted Answer

The low level of IgG in the initial test indicates a possible case of transient hypogammaglobulinemia, which is a condition where infants have decreased levels of immunoglobulins. However, in most cases, IgG levels increase as the child ages and their immune system matures. This is likely the reason why the infant's IgG level had increased by the follow-up visit. The other conditions mentioned (SCID, common variable immunodeficiency, and DiGeorge anomaly) typically have more severe and persistent immune system abnormalities.

A 9-Month-Old Infant Is Seen by a Physician Due to a Persistent