MARA SANDRA HOSHIDA
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LIM/57 - Laboratório de Fisiologia Obstétrica, Hospital das Clínicas, Faculdade de Medicina
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- Vertical transmission of SARS-CoV2 during pregnancy: A high-risk cohort(2021) MAEDA, Mariane de Fatima Yukie; BRIZOT, Maria de Lourdes; GIBELLI, Maria Augusta Bento Cicaroni; IBIDI, Silvia Maria; CARVALHO, Werther Brunow de; HOSHIDA, Mara Sandra; MACHADO, Clarisse Martins; SABINO, Ester Cerdeira; SILVA, Lea Campos de Oliveira da; JAENISCH, Thomas; MENDES-CORREA, Maria Cassia Jacintho; MAYAUD, Philippe; FRANCISCO, Rossana Pulcinelli VieiraObjective Identify the potential for and risk factors of SARS-CoV-2 vertical transmission. Methods Symptomatic pregnant women with COVID-19 diagnosis in whom PCR for SARS-CoV-2 was performed at delivery using maternal serum and at least one of the biological samples: cord blood (CB), amniotic fluid (AF), colostrum and/or oropharyngeal swab (OPS) of the neonate. The association of parameters with maternal, AF and/or CB positivity and the influence of SARS-CoV-2 positivity in AF and/or CB on neonatal outcomes were investigated. Results Overall 73.4% (80/109) were admitted in hospital due to COVID-19, 22.9% needed intensive care and there were four maternal deaths. Positive RT-PCR for SARS-CoV-2 was observed in 14.7% of maternal blood, 13.9% of AF, 6.7% of CB, 2.1% of colostrum and 3.7% of OPS samples. The interval between COVID-19 symptoms and delivery was inversely associated with SARS-CoV-2 positivity in the maternal blood (p = 0.002) and in the AF and/or CB (p = 0.049). Maternal viremia was associated with positivity for SARS-CoV-2 in AF and/or CB (p = 0.001). SARS-CoV-2 positivity in the compartments was not associated with neonatal outcomes. Conclusion Vertical transmission is possible in pregnant women with COVID-19 and a shorter interval between maternal symptoms and delivery is an influencing factor.