TABLE 1.
Validation data
| Groupa | No. of pigs
|
|
|---|---|---|
| Infected (n = 316)b | Healthy (n = 370)c | |
| bELISA positive | 309 | 0 |
| bELISA negative | 7 | 370 |
| IDEXX ELISA positive | 308 | 0 |
| IDEXX ELISA negative | 8 | 370 |
| IFA positive | 314 | 0 |
| IFA negative | 2 | 370 |
a
Diagnostic sensitivity and specificity for bELISA-positive and -negative groups, 97.8 and 100%, respectively. Diagnostic sensitivity and specificity for IDEXX ELISA-positive and -negative groups, 97.2 and 100%, respectively. Diagnostic sensitivity and specificity for IFA-positive and -negative groups, 99.4 and 100%, respectively.
b
Individual animals at dpi 21 of challenge study or field animals with positive results by IDEXX, with positive results by IFA, and farm with history of PRRS.
c
Individual pigs never exposed to PRRSV.