ArticleBMC pregnancy and childbirth2026
High exposure of pregnant women to SARS-CoV-2 during COVID-19 waves in Senegal.
Article in BMC pregnancy and childbirth, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundThe COVID-19 pandemic raised concerns about SARS-CoV-2 infection in pregnant women, especially regarding pregnancy outcomes and maternal-child health. Despite the limited seroprevalence data in this population category, it is crucial for public health strategies in Africa. Therefore, this study aims to determine the seroprevalence of SARS-CoV-2 in pregnant women attending antenatal consultations (ANC) in Senegal.
methodsThis is a retrospective serological study using archived plasma samples collected prospectively, ensuring no redundancies, among pregnant women attending ANC, between March and July 2021 during the Delta wave of COVID-19. Plasma samples were stored at -80 °C until analysis for the presence of IgG and IgM antibodies against SARS-CoV-2 using the WANTAI SARS-CoV-2 Ab ELISA (Wantai Biological Pharmacy Enterprise, Beijing), according to the manufacturer's protocol. Bivariate analysis was conducted to evaluate characteristics associated with seropositivity using JMP
resultA total of 1,227 pregnant women were recruited from five health facilities, including two in Dakar (n = 166) and one in each of the following regional capitals: Saint-Louis (n = 400), Ziguinchor (n = 264), and Kédougou (n = 397). The median age was 25 years [range:18-50]. The overall seroprevalence observed was 64.9% [95% CI: 62.24-67.57], with higher exposure rates in Dakar 71.6% [95% CI: 64.40-77.99], and Ziguinchor 68.1% [95% CI: 62.34-73.51]. Kédougou and Saint-Louis reported 62.9% [95% CI: 58.12-67.58] and 62% [95% CI: 57.15-66.62], respectively. According to age group, the seroprevalence was 62.6% [95% CI: 58.49-66.71], 66.6% [95% CI: 61.62-71.36], 66.3% [95% CI: 59.94-72.24], and 67.2% [95% CI: 58.37-75.01], respectively, for [18-23], [24-29], [30-35], and ≥ 36 years old. Despite these observed variations in the seroprevalence of SARS-CoV-2 across localities, differences are not statistically significant (p = 0.7024).
conclusionIn summary, this study highlights a high seroprevalence of SARS-CoV-2 among pregnant women, with higher exposure rates in Dakar and Ziguinchor. These findings demonstrated that SARS-CoV-2 has spread massively in Senegal, despite few reported cases, similar to trends observed in other African countries. Ultimately, this study reveals seroepidemiological data for SARS-CoV-2 in pregnant women, previously unknown at the national level.
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