Detection of serum IgG specific for -ID (ID), HS, FBS, and bovine serum albumin (BSA) in dog M2 by ELISA. Titers are shown as the dilution of serum that gave a corrected OD reading of greater than two times the dog’s preinfusion serum. Analysis of anti-FBS, -HS, and -BSA antibodies was not evaluated before 3 months. The timing of infusions and initiation of treatment with cyclosporine A are shown with arrows.