TABLE 1.
Specificities of four EIAs for 20 serum specimens from patients positive for RF, ANA, or anti-viral IgM (group III)
| Group III category | No. of serum specimens (n = 20) | No. of serum samples positive for IgM by:
|
|||
|---|---|---|---|---|---|
| EIA-Platelia | EIA-Sorin | EIA-BMD | EIA-Biotest | ||
| Infectious mononucleosis | 5 | 0 | 5 | 0 | 3 |
| IgM positive | |||||
| Cytomegalovirus | 2 | 0 | 1 | 0 | 0 |
| Epstein-Barr virus VCAa | 2 | 0 | 1 | 0 | 1 |
| Hepatitis A | 2 | 0 | 1 | 0 | 1 |
| Herpes simplex virus | 2 | 0 | 2 | 0 | 0 |
| Varicella-zoster virus | 1 | 0 | 1 | 0 | 0 |
| Measles virus | 1 | 0 | 1 | 1 | 0 |
| Mumps virus | 1 | 0 | 1 | 1 | 1 |
| RF positive | 2 | 0 | 1 | 0 | 0 |
| ANA positive | 2 | 0 | 1 | 0 | 1 |
| % Specificity | 100 | 25 | 90 | 65 | |
a
VCA, viral capsid antigen.