Zou ZH, et al. - Researchers here explored the influences of prenatal antibiotic exposure, the intensity of prenatal and postnatal antibiotic exposure on gut microbiota of preterm infants. In addition, they investigated if gut microbiota and drug-resistant strains in the Neonatal Intensive Care Unit (NICU) over a defined period are related. As per findings, the composition of early gut microbiota in preterm infants could be affected by prenatal and postnatal antibiotic exposure. Antibiotic-resistant bacteria in NICU could have a role in reshaping the early gut microbiota of preterm infants with prenatal and postnatal antibiotic exposure.