Maternal antibiotic use negatively affects breastfed infants
Evidence indicates that maternal and early infant antibiotic use negatively impacts breastfed infants by disrupting gut microbiome development and increasing the carriage of antibiotic-resistant bacteria.
The retrieved literature consistently supports the premise that antibiotic exposure—either directly or via maternal transmission affecting breastfed infants—disrupts the normal trajectory of the infant gut microbiome, reduces beneficial metabolic functions, and enriches antimicrobial resistance genes.
Yanping Xu, Olivia Milburn, Traci Beiersdorfer, Lizhong Du, Henry Akinbi, David B. Haslam. Antibiotic exposure prevents acquisition of beneficial metabolic functions in the preterm infant gut microbiome. 2022. https://doi.org/10.1186/s40168-022-01300-4
Paper 0 demonstrates that early antibiotic exposure disrupts the developmental trajectory and metabolic functions of the neonatal gut microbiome.
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Z. Pan, C. Walsh, C. Feehily, Sai Ravi Chandra Nori, F. McAuliffe, P. Cotter, J. MacSharry, D. van Sinderen. Breastfeeding and the milk resistome shape the establishment and transmission of antibiotic resistance genes in the infant gut microbiome. 2025. https://doi.org/10.1080/19490976.2025.2541033
Paper 7 notes that maternal antibiotic use can facilitate the transmission of specific antibiotic resistance genes to breastfed infants via breast milk.
Saahithya Mahesh, V. Rajesh, V. Shetty, Ankur Mutreja, A. Hegde, Veena G. Kamath, M. A. Kunder, Shrikiran Aroor, T. Ramamurthy, Shruti R Pai, M. Ballal. Temporal Burden of WHO Critical-Priority Enterobacteriaceae in the Infant Gut During Early Life influenced by Maternal Postpartum Antibiotic Exposure.. 2025. https://doi.org/10.1016/j.ijmmb.2025.100999
Paper 8 shows that maternal postpartum antibiotic exposure significantly increases the likelihood of infants carrying drug-resistant Enterobacteriaceae.
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