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To the Editor: We reviewed the hospital records of neonates delivered to 176 COVID-positive mothers admitted in our university (mid-May to mid-December 2020). All these neonates were tested by RT-PCR of nasopharyngeal swab within 48 h of birth.
Out of 179 neonates (3 twins), 7 (3.3%) were COVID- positive. All except 1 were born by lower segment cesarean section. Five were asymptomatic and 2 had severe birth asphyxia; of which 1 expired within 2 h of birth. The other neonate was intubated in delivery room for 72 h. Sepsis screen was negative but CRP was raised (15.5 mg/dL). Blood culture was sterile. On day 9, repeat RT-PCR was negative and the neonate was discharged on day 14. Of the positive neonates, 3 were on exclusive breast-feeding and others were on formula feed. Skin-to-skin contact was not provided, as guidelines at that time were not clear.
On repeat testing (day 5–7) by RT-PCR, all positive neonates tested negative. Of the 172 neonates who tested negative within 48 h of birth, 24 were retested after day 5 and all were negative.
Our data for vertical transmission of SARS-CoV-2 was similar to that found in other studies abroad and from India [1]. The rates were higher from a study from India (10.7%). Most of their neonates were asymptomatic and none died due to SARS-CoV-2 [2]. However, data from Mumbai reported higher rates of vertical transmission (4.25%), more symptomatic neonates, and mortality (16.6%) [3]. The authors also reported multisystem inflammatory syndrome (MIS-C) in 1 neonate. Another study from Mumbai [4] reported infection rate of 10.9%, a third had symptoms.
In our hospital the perinatal transmission rate of SARS-CoV-2 was low, and was maximum at the time of peak of COVID transmission in September 2020. Most cases were asymptomatic with no mortality attributable to SARS-CoV-2.
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Tripathi, S., Awasthi, S., Singh, S.N. et al. Vertical Transmission of COVID-19. Indian J Pediatr 88, 1058 (2021). https://doi.org/10.1007/s12098-021-03833-2
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DOI: https://doi.org/10.1007/s12098-021-03833-2