Seroprevalence of HBV (anti‐HBc, HBsAg and anti‐HBs) and HDV infections among 9006 women at delivery*

Wiley - Tập 16 Số 2 - Trang 110-116 - 1996
Pierre–Alexandre Bart1, P Jacquier2, Patrick Zuber3, Daniel Lavanchy4, P. C. Frei4
1Division of Immunology and Allergy Centre Hospitalier Universitaire Vaudois Lausanne, Switzerland
2Institute of Parasitology, University of Bern
3Federal Office of Public Health, Bern, Switzerland
4Division of Immunology and Allergy, Centre Hospitalier Universitaire Vaudois, Lausanne

Tóm tắt

Abstract: Serum samples from 9006 women, who delivered in Switzerland in 1990 and 1991, were collected around the country. Of these women, 62.7% were Swiss and 37.3% originated from foreign countries. Samples were first screened for anti‐HBc and those found positive were further tested for HBsAg, anti‐HBs and anti‐HDV Anti‐HBc was found in 640 of the 9006 women (overall prevalence, 7.1%; Swiss, 3.3%; foreigners, 13.5%). Of these 640 positive samples, 61 (9.5%) were positive for HBsAg (without anti‐HBs), 467 (73.0%) positive for anti‐HBs (without HBsAg) and 8 (1.3%) positive for both HBsAg and anti‐HBs. The remaining 104 were thus anti‐HBc positive without HBsAg or anti‐HBs. These 104 specimens with the so‐called “isolated anti‐HBc” reactivity represented 1.2% of the whole population or 16.3% of the 640 anti‐HBc positive mothers. All were HBV DNA negative (PCR). Anti‐HDV antibody was found in only five women. HBsAg was seen in 38 of the cord‐blood samples from the anti‐HBc positive mothers. In this large sampling, we observed a relatively high seroprevalence of HBV infection. Cases with isolated anti‐HBc reactivity, being HBV DNA negative by PCR, were probably non‐infectious at the time of blood collection.

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