Temporal serological analysis of anti-BBA64, -BBA65, and -BBA66 during persistent infection in mice. Immunoblotting was performed for recombinant BBA64, BBA65, BBA66, and maltose-binding protein MalE. Mouse serum was obtained at specific days p.i. and was blotted with the recombinant proteins, as indicated at the bottom. P, preimmune serum.