Table 1.

Geometric mean titers in the leptospirosis MAT over time from illness onset to specimen collection

Days after onset when specimen was collectedNumber of specimensGeometric mean MAT titera
TotalWith an MAT titer of ≥100 (%)
0–67927 (34)233
7–134026 (65)1,162
14–202726 (96)2,801
21–273433 (97)2,649
28–341111 (100)3,630
35–411514 (93)2,498
42 or more2019 (95)1,152
Total226156 (69)1,407
  • a Geometric mean titer calculations were limited to 156 specimens obtained from patients with confirmed leptospirosis and with an MAT titer of ≥100.