TABLE 1.
Comparison of sensitivities and specificities of the tandem PRRS ELISA, IDEXX ELISA, and IPMA-IFA for the detection of antibodies against US PRRSV and EU PRRSV
| Origin of sera | Test | Sensitivity and specificity with the following reference testa:
|
|||||
|---|---|---|---|---|---|---|---|
| US or EU ELISAb
|
IDEXX
|
IPMA-IFA
|
|||||
| Se | Sp | Se | Sp | Se | Sp | ||
| United States | US ELISA | 0.94 | 0.86 | 0.74 | 0.94 | ||
| IDEXX | 0.94 | 0.87 | 0.75 | 0.94 | |||
| IPMA-IFA | 0.99 | 0.50 | 0.86 | 0.64 | |||
| Germany and United Kingdom | EU ELISA | 0.83 | 0.79 | 0.85 | 0.80 | ||
| IDEXX | 0.93 | 0.59 | 0.84 | 0.70 | |||
| IPMA-IFA | 0.93 | 0.64 | 0.88 | 0.63 | |||
a
Sensitivity (Se) = number of positive samples in both the test and the reference test/total number of positive samples in the reference test. Specificity (Sp) = number of negative samples in both the test and the reference test/total number of negative samples in the reference test.
b
US ELISA for samples from the United States; EU ELISA for samples from Germany and the United Kingdom.