VP45.31: Prevalence of SARS‐CoV2 in asymptomatic patients

Abstract

Describe the prevalence of SARS-CoV2 among asymptomatic patients admitted for delivery. This is a prospective cohort study based on data collected at the University Hospital Fundacion Santa Fe de Bogota between May and June 2020, in asymptomatic pregnant patients admitted for delivery. All patients without a prior diagnosis of COVID-19 underwent the nasopharyngeal swab SARS-CoV2 polymerase chain reaction (PCR) test. Patients scheduled for a Caesarean delivery were examined and evaluated at preoperative visits. Hospital policies recommended the use of universal masks and N95 maks in clinical units by physicians, patients, and support persons, and limited each visitor to 1 childbirth assistance visitor. Universal tests of patients already diagnosed with COVID-19 and patients not admitted for delivery were excluded. 106 patients who presented for delivery were examined. The average age was 33 years with a standard deviation of ( ± ) 6 years, the average gestational age at delivery was 38.3 weeks ( ± ) 2.4 weeks. Regarding the obstetric history, 36 patients (33%) were nulliparous women, 63 (59%) were considered to be of high obstetric risk. In 84 (79%) is the Caesarean birth, all babies had an APGAR> 7 until the first minute and the mean birth weight was 2978 grams ( ± ) 461 grams. Only 1 (<1%) patient was positive for SARS-CoV2 by PCR, showing a prevalence of less than <1% of SARS-CoV2 in this cohort of asymptomatic pregnant women. No healthcare worker in obstetric units was removed from work due to exposure to SARS-CoV2 or transmission disease from known or possible contact with a patient. These results are limited to a hospital setting and a single geographic region. These findings found a low (<1%) prevalence of positive SARS-CoV2 test results among asymptomatic patients in a pregnant population, until June 2020, the city of Bogotá, Colombia, was not considered a highly endemic region.