TABLE 4.
Virology and delivery characteristics of hepatitis B surface antigen (HBsAg)-positive infants (n=7)
| Case number | Year of birth | Maternal HBeAg status | HBsAg status post-PEP | Anti-HBs | Adequate immunity | PEP receipt | Mode of delivery | Breastfeeding* |
|---|---|---|---|---|---|---|---|---|
| 1 | 2008 | Positive | Positive | Negative | Not immune | Off-schedule† | Vaginal (forceps) | Partial |
| 2 | 2008 | Positive | Positive | Negative | Not immune | Complete | Vaginal (vacuum) | Exclusive |
| 3 | 2008 | Positive | Positive | Negative | Not immune | Complete | Vaginal (SVD) | Exclusive |
| 4 | 2009 | Positive | Positive | Positive | Immune | Off-schedule | Caesarean section | Unknown |
| 5 | 2009 | Positive | Positive | Negative | Not immune | Complete | Vaginal (SVD) | Unknown |
| 6 | 2009 | Unknown | Positive | Negative | Not immune | Complete | Vaginal (SVD) | Exclusive |
| 7 | 2010 | Positive | Positive | Negative | Not immune | Complete | Caesarean section (elective) | Partial |
*
Partial, supplemented breast milk with formula; exclusive, breast milk only;
†
Defined as any dose that was administered at least ≥1 month(s) off the recommended schedule. HBeAg Hepatitis B e antigen; HBs Hepatitis B surface antigen; PEP Postexposure prophylaxis; SVD Spontaneous vaginal delivery