Antibodies and nested PCR findings of two patients with parvovirus B19 infection
| Days after onset of polyarthritis | VP2-IgM EIA | VP2-IgG EIA | VP2-ETS ratio | VP1-IgG avidity (%) | PCR | |
|---|---|---|---|---|---|---|
| VP2, major capsid protein; VP1, minor capsid protein; ETS, epitope type-specific IgG; pos, positive; neg, negative; ND, not determined. | ||||||
| Zone of acute infection in VP2/ETS ratio 0-10; zone of past immunity >10. | ||||||
| Zone of acute infection in VP1 IgG avidity 0-15%; borderline zone 16-25%, zone of past immunity: >25%. | ||||||
| Signs of acute parvovirus infection are shown in bold. | ||||||
| Case 1 | 7 | Pos | Pos | 0.38 | 6.3 | + |
| 20 | ND | Pos | 0.41 | 6.6 | + | |
| 400 | Neg | Pos | 232.57 | 52.8 | - | |
| Case 2 | 4 | Pos | Pos | 0.28 | - | + |
| 24 | ND | Pos | 0.49 | 6.2 | ND | |
| 47 | Pos | Pos | 0.81 | 11.8 | + | |
| 110 | Neg | Pos | 4.98 | 24.7 | + | |
| 144 | - | Pos | 13.42 | 26.5 | + | |
| 500 | ND | ND | ND | ND | + | |