Human breast milk (HBM) contains a complex and dynamically changing variety of factors that contribute to the infant's developing immune system's ability to fight upper respiratory tract infections, including otitis media (OM). We sought to summarize the current evidence on the protective characteristics of HBM, through direct or donated feeding, toward early childhood OM.
Methods:
For this narrative review, we performed a literature search on OM in the context of HBM feeding in the PubMed, Embase, and Google Scholar databases, between January 1, 2008, and July 1, 2023.
Results:
Immunoglobulin A (IgA) provides a short-term immunity of 2–3 days against otopathogens causing OM. IgA-mediated immunity is effective against OM up to 7 months of age if breastfeeding continues. The role of transferred IgM and IgG in HBM is unclear. Although there is a potential protective value of microRNA, hormones, oligosaccharides, stem cells, and interleukins present in HBM, their role is unclear. Any duration of breastfeeding is superior to no breastfeeding in OM risk reduction, with a big variability among studies (odds ratio 0.23–0.81, depending on the duration). Duration of breastfeeding ≥6 months was found to be the most effective in OM risk reduction, but there was no evidence of continued benefits after 2 years of age. Expressed breastfeeding was not shown to be more beneficial. The protective values of donor HBM against OM are still undetermined.
Conclusion:
HBM has numerous components that contribute to protection against early childhood OM.
Impact statement
Summarize the recent changes and developments regarding the protective characteristics of human milk feeding and its ability to reduce otitis media in early childhood, with key information on human milk's various components and their effect on the growing immune system.
Address the use of donated human milk in settings with common infections.
Give pediatric health care providers the information they need to be able to educate parents on the positive effect that human milk has against common infections of early childhood, especially otitis media.
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