TABLE 2.
Concordance and discordance between ICT and microagglutinationa
| Specimen | Result |
Concordance (%) | Result |
Discordance (%) | ||
|---|---|---|---|---|---|---|
| ICT | MA | ICT | MA | |||
| Human serum | + | + | 47.4 (55/116) | + | - | 1.8 (2/116) |
| - | - | 50.0 (58/116) | - | + | 0.9 (1/116) | |
| Total | 97.4 (113/116) | 2.7 (3/116) | ||||
| Animal serum | + | + | 23.9 (22/92) | + | - | 0.0 (0/92) |
| - | - | 76.1 (70/92) | - | + | 0.0 (0/92) | |
| Total | 100.0 (92/92) | 0.0 (0/92) | ||||
| Both human and | + | + | 37.0 (77/208) | + | - | 1.0 (2/208) |
| animal sera | - | - | 61.5 (128/208) | - | + | 0.5 (1/208) |
| Total | 98.5 (205/208) | 1.5 (3/208) | ||||
a
MA, microagglutination. The values in parentheses indicate the number of sera giving positive results/the total number of sera tested. The two assays showed almost perfect agreement (κ = 0.98) (2). Round-off errors account for the total of 100.1% for the combined total of the human serum values.