Identification of immuno-dominant proteins in NTUH-K2044 by two dimensional-gel electrophoresis. A, the immunoblotting with serum from healthy subject. B, the immunoblotting with serum from patient 2 with K. pneumoniae causing PLA. C, the coomassie blue staining of the secreted proteins of NTUH-K2044 strain. The arrow heads indicate the putative protein immuno-reactive to sera from patients with PLA.