Figure 1. Serum IgM, IgG, and IgA levels over time in the patient.

A turbidimetric method was used to determine serum immunoglobulin levels in serial samples. The date of first presentation of the patient at the clinic is set as 0. The upper and lower ranges of normal immunoglobulin levels are indicated by a dashed line. Intravenous immune globulin therapy was initially initiated but stopped after 6 months.