Table 2.

ELISA characterization of serum samples

Serum setNo. of samples availableMean ELISA responsea (median/range)
Triton 17 kDaRecombinant 27 kDa
Georgia nonoutbreak7480.3 (106.5/0–1,293)c 444.0 (537.5/0–6,430)d
Georgia early outbreak32b 11.5 (10/0–3,426)c 102.5 (274.5/0–3,740)d
Georgia late outbreak (total)96384 (591/0–7,878)1,503 (1,696/0–34,456)
Washington late outbreak (total)3532.2 (491/0–6,400)1,321 (1,338/91–13,528)
• a Arbitrary units.

• b One sample with responses of 43,136 U and 46,336 U to the Triton and recombinant 27-kDa antigens, respectively, was considered an outlier and omitted.

• c Mean values were significantly different from those of other serum sets and from each other when a multiple-comparison t test was used. The P values for all comparisons were <0.0104.

• d Mean values were significantly different from those of other serum sets and from each other when a multiple-comparison t test was used. The P values for all comparisons were <0.0226.