Severe Acute Respiratory Syndrome Coronavirus-2 Antigens and Antibodies in Breast Milk

Keskindemirci, G.; Karabayir, N.; Istanbullu Tosun, A.; Hancerli Torun, S.; Altay, C. S.; Sebirli, M.; Kaba, O.; Kibar, B. S.; Gokcay, G.

Objective: This study aimed to determine the presence of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) antigens and IgM and IgG antibodies in breast milk of mothers diagnosed with Coronavirus disease-19 (COVID-19). Methods: The study was conducted in 11 mother-child pairs. Breastfeeding mothers who were either positive according to a PCR test or those who were negative but had COVID symptoms were included in the study. Expressed milk was stored at -20/-80 degrees C until analysis. Breastmilk SARS-CoV-2 antigens and IgM and IgG antibodies were measured. The infants were followed for at least 15 days. Results: SARS-CoV-2 PCR tests using a nasopharyngeal swab was positive in 10 of 11 mothers. Nine mothers had symptoms of COVID-19. Breast milk samples were taken, on average, 15 days after symptom onset or a positive PCR result. SARS-CoV-2 PCR tests using a nasopharyngeal swab was positive in seven infants. The SARS-CoV-2 antigen was not detected in the breast milk of any of the mothers. However, SARS-CoV-2 IgG and IgM antibodies were detected in the breast milk of two mothers, who had a positive PCR test and experienced clinical symptoms. The children of these two mothers experienced no symptoms. Conclusion: Official institutions have recommended and supported breastfeeding during the SARS-CoV-2 pandemic. Our findings support this recommendation. The promotion and protection of breastfeeding under emergency conditions is of great importance for the health of children, mothers, and society.