The single antigen ELISA data was re-evaluated and different criteria were used to calculate sensitivity and specificity. The serum tested was determined to be
melioidosis positive according to the following criteria: (1) any 2 or more antigens specifically react with serum with the absorbance greater than the cut-off value
calculated from the mean absorbance (A405nm) plus 2 standard deviations of healthy controls or (2) any antigen that specifically reacts with serum when the
cut-off value was calculated from the mean absorbance (A405nm) plus 3 standard deviations of healthy controls.