Some laboratories use different measurements or may test different specimens.What abnormal results meanHigher-than-normal levels may be due to:Chronic inflammation or infection, including HIV and hepatitis B or CMultiple myelomaWaldenstrom's disease Lower-than-normal levels may be due to:AgammaglobulinemiaBleeding (hemorrhage)Burns (extensive)GlomerulonephritisLiver diseaseMalabsorptionMalnutritio