TABLE 2.
Details of studies that have reported the decay of maternal anti-VZV antibodies and the age at which anti-VZV antibodies disappear in infantsa
| Study (reference) | Country | Study period | Birth | No. of infants | Assay used to measure anti-VZV Ab | Age (mo) at anti-VZV Ab disappearance |
|---|---|---|---|---|---|---|
| Present study | France | 2005-2006 | Full term | 345 | TRFIA | 4 |
| Ozaki et al. (19) | Japan | 1980 | Full term | 24 | NT | 4 |
| Heininger et al. (10) | Switzerland | 1994-1999 | Full term | 240 | ELISA | 4-6 |
| Linder et al. (14) | Israel | 1997 | Preterm | 120 | IFAMA | 2-6 |
| Leineweber et al. (12) | Switzerland | 1999-2000 | Preterm | 66 | ELISA | <6 |
| Full term | 31 | ELISA | >6 | |||
| van der Zwet et al. (22) | The Netherlands | 1995-2000 | Preterm | 27 | VIDAS | 3 |
a
Ab, antibodies; NT, neutralization test (described previously by Asano and Takahashi [1a]); ELISA, enzyme-linked immunosorbent assay; IFAMA, immunofluorescent antibodies to membrane antigen assay; VIDAS, the Vitek immunodiagnostic assay system, an automated enzyme-linked fluorescent immunoassay.