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Bäuerl C, Randazzo W, Sánchez G, Selma-Royo M, García Verdevio E, Martínez L, Parra-Llorca A, Lerin C, Fumadó V, Crovetto F, Crispi F, Pérez-Cano FJ, Rodríguez G, Ruiz-Redondo G, Campoy C, Martínez-Costa C, Collado MC. SARS-CoV-2 RNA and antibody detection in breast milk from a prospective multicentre study in Spain. Arch Dis Child Fetal Neonatal Ed 2022; 107:216-221. [PMID: 34417223 DOI: 10.1101/2021.05.06.21256766] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 07/12/2021] [Indexed: 05/21/2023]
Abstract
OBJECTIVES To develop and validate a specific protocol for SARS-CoV-2 detection in breast milk matrix and to determine the impact of maternal SARS-CoV-2 infection on the presence, concentration and persistence of specific SARS-CoV-2 antibodies. DESIGN AND PATIENTS This is a prospective, multicentre longitudinal study (April-December 2020) in 60 mothers with SARS-CoV-2 infection and/or who have recovered from COVID-19. A control group of 13 women before the pandemic were also included. SETTING Seven health centres from different provinces in Spain. MAIN OUTCOME MEASURES Presence of SARS-CoV-2 RNA in breast milk, targeting the N1 region of the nucleocapsid gene and the envelope (E) gene; presence and levels of SARS-CoV-2-specific immunoglobulins (Igs)-IgA, IgG and IgM-in breast milk samples from patients with COVID-19. RESULTS All breast milk samples showed negative results for presence of SARS-CoV-2 RNA. We observed high intraindividual and interindividual variability in the antibody response to the receptor-binding domain of the SARS-CoV-2 spike protein for each of the three isotypes IgA, IgM and IgG. Main Protease (MPro) domain antibodies were also detected in milk. 82.9% (58 of 70) of milk samples were positive for at least one of the three antibody isotypes, with 52.9% of these positive for all three Igs. Positivity rate for IgA was relatively stable over time (65.2%-87.5%), whereas it raised continuously for IgG (from 47.8% for the first 10 days to 87.5% from day 41 up to day 206 post-PCR confirmation). CONCLUSIONS Our study confirms the safety of breast feeding and highlights the relevance of virus-specific SARS-CoV-2 antibody transfer. This study provides crucial data to support official breastfeeding recommendations based on scientific evidence. Trial registration number NCT04768244.
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Affiliation(s)
- Christine Bäuerl
- Department of Biotechnology, Institute of Agrochemistry and Food Technology-National Research Council (IATA-CSIC), Paterna, Valencia, Spain
| | - Walter Randazzo
- Department of Preservation and Food Safety Technologies, Institute of Agrochemistry and Food Technology-National Research Council (IATA-CSIC), Paterna, Valencia, Spain
| | - Gloria Sánchez
- Department of Preservation and Food Safety Technologies, Institute of Agrochemistry and Food Technology-National Research Council (IATA-CSIC), Paterna, Valencia, Spain
| | - Marta Selma-Royo
- Department of Biotechnology, Institute of Agrochemistry and Food Technology-National Research Council (IATA-CSIC), Paterna, Valencia, Spain
| | - Elia García Verdevio
- Department of Gynecology and Obstetrics, Hospital Universitario Dr Peset, Valencia, Spain
| | - Laura Martínez
- Department of Paediatrics, Hospital Clínico Universitario de Valencia, Nutrition Research Group of INCLIVA, Valencia, Spain
| | - Anna Parra-Llorca
- Health Research Institute La Fe, Neonatal Research Group and University and Polytechnic Hospital La Fe, Division of Neonatology, Valencia, Spain
| | - Carles Lerin
- Department of Endocrinology, Institut de Recerca Sant Joan de Déu, Hospital Sant Joan de Déu, Barcelona, Spain
| | - Victoria Fumadó
- Department of Infectious and Imported Diseases, Paediatric Unit, Institut de Recerca Sant Joan de Déu, Hospital Sant Joan de Déu, Barcelona, Spain
| | - Francesca Crovetto
- BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine, Hospital Sant Joan de Déu and Hospital Clínic, University of Barcelona, CIBERER, Barcelona, Spain
| | - Fatima Crispi
- BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine, Hospital Sant Joan de Déu and Hospital Clínic, University of Barcelona, CIBERER, Barcelona, Spain
| | - Francisco J Pérez-Cano
- Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Science, University of Barcelona, Barcelona, Spain
| | - Gerardo Rodríguez
- University of Zaragoza, Hospital Clínico Universitario Lozano Blesa, Zaragoza. Instituto de Investigación Sanitaria Aragón (IIS Aragón), Red de Salud Materno Infantil y del Desarrollo (SAMID), Zaragoza, Spain
| | - Gemma Ruiz-Redondo
- Department of Gynecology and Obstetrics, University Hospital Clinic "San Cecilio" - Health Sciences Technological Park (PTS), Granada, Spain
| | - Cristina Campoy
- Department of Paediatrics, University of Granada, Granada, Spain
| | - Cecilia Martínez-Costa
- Department of Paediatrics, Hospital Clínico Universitario de Valencia, Nutrition Research Group of INCLIVA, Valencia, Spain
| | - Maria Carmen Collado
- Department of Biotechnology, Institute of Agrochemistry and Food Technology-National Research Council (IATA-CSIC), Paterna, Valencia, Spain
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