TABLE 1.
IFA titer | n | No. of reactive specimens with assay
|
||||||
---|---|---|---|---|---|---|---|---|
RIPA | IHA
|
ELISA
|
||||||
Hemagen | Biolab | Abbott | Embrabio | Organon | Gull | |||
1:20 | 9 | 1 | 0 | 0 | 0 | 0 | 4 | 3 |
1:40 | 35 | 32 | 34 | 24 | 32 | 32 | 35 | 35 |
1:80 | 56 | 56 | 56 | 50 | 56 | 56 | 56 | 56 |
1:160 | 101 | 101 | 101 | 99 | 99 | 100 | 101 | 101 |
Total no. positive | 201 | 190 | 191 | 173 | 187 | 188 | 196 | 195 |
% Agreement | NAb | 95 | 95 | 86 | 93 | 94 | 98 | 97 |
Data are grouped by the number of reactive specimens identified by each test at various IFA-positive (values of ≥1:20) titers. The percentage of agreement was defined as the total number of positive specimens for each test divided by 201 (total number IFA positive) and multiplied by 100.
NA, not applicable.