Figure 1.

Serum-immune responses to purified O-polysaccharide (OPS) and hemolysin co-regulated protein (Hcp1) antigens. Serum samples were assayed for reactivity with the target antigens using single-dilution enzyme-linked immunosorbent assays. Connecting lines indicate identical serum samples. Closed circles represent serum from 124 Myanmar febrile patients. Open boxes represent pooled serum from five culture-confirmed Thai melioidosis patients (positive control). Closed boxes represent pooled serum from five healthy Thai donors (negative control).