TABLE 1.
The results of the IgG rec-ELISAs obtained with T. gondii recombinant antigens compared with those of IgG IFA or IgG com-ELISA (serum group I)
| Test and titer | No. of sera examined | No. (%) of positive sera
|
|||
|---|---|---|---|---|---|
| GRA7 | GRA1 | SAG1 | GRA7 + GRA1 + SAG1 | ||
| IgG IFA | |||||
| Negative (<1:32) | 20 | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| 1:128-1:256 (25-50 IU) | 20 | 16 (80.0) | 18 (90.0) | 14 (70.0) | 18 (90.0) |
| 1:512-1:1,024 (100-200 IU) | 26 | 18 (69.2) | 20 (76.9) | 24 (92.3) | 26 (100) |
| 1:2,048-1:8,192 (400-1,600 IU) | 36 | 30 (83.3) | 28 (77.8) | 36 (100) | 36 (100) |
| Total (1:128-1:8,192) | 82 | 64 (78.0) | 66 (80.5) | 74 (90.2) | 80 (97.6) |
| IgG ELISA | |||||
| Negative (<1:100) | 41 | 0 (0) | |||
| 1:100 | 16 | 11 (68.7) | |||
| 1:200 | 24 | 21 (87.5) | |||
| 1:400 | 31 | 29 (93.5) | |||
| 1:800 | 25 | 24 (96.0) | |||
| 1:1,600 | 28 | 28 (100) | |||
| Total (1:100-1:1,600) | 124 | 113 (91.1) | |||