Related Experiment Video
Updated: Aug 1, 2025

Probiotic Studies in Neonatal Mice Using Gavage
Published on: January 27, 2019
Probiotics to improve the gut microbiome in premature infants: are we there yet?
Emily M Mercer1,2,3, Marie-Claire Arrieta1,2,3
1Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada.
Insights
Probiotic supplementation can prevent serious gut issues like necrotizing enterocolitis (NEC) and late-onset sepsis (LOS) in premature infants. Early use supports healthy gut microbiome development and immune function in vulnerable newborns.
Area of Science:
- Neonatal microbiome research
- Pediatric gastroenterology
- Immunology
Background:
- Preterm infants exhibit altered gut microbiome development compared to term infants.
- Microbiome dysbiosis is linked to clinical conditions such as necrotizing enterocolitis (NEC) and late-onset sepsis (LOS).
- Probiotic supplementation is a potential strategy to modulate the preterm infant gut microbiome.
Approach:
- This review synthesizes current literature on probiotic effects in preterm infants.
- It explores proposed mechanisms of probiotic action on the gut microbiome, metabolome, and immune system.
- Clinical considerations for optimal probiotic use are discussed.
Key Points:
- Probiotics demonstrate efficacy in preventing NEC and LOS in preterm infants.
- Emerging evidence supports probiotic benefits for preterm gut microbiome composition, metabolic activity, and immune modulation.
- Understanding these effects is crucial for establishing best practices.
Conclusions:
- Probiotic supplementation is a promising prophylactic intervention for preterm infants.
- Further research is needed to elucidate optimal probiotic strains, dosages, and administration timing.
- Evidence-based guidelines are essential for integrating probiotics into neonatal care protocols.
Abstract:
Gut microbiome maturation in infants born prematurely is uniquely influenced by the physiological, clinical, and environmental factors surrounding preterm birth and early life, leading to altered patterns of microbial succession relative to term infants during the first months of life. These differences in microbiome composition are implicated in acute clinical conditions that disproportionately affect preterm infants, including necrotizing enterocolitis (NEC) and late-onset sepsis (LOS). Probiotic supplementation initiated early in life is an effective prophylactic measure for preventing NEC, LOS, and other clinical concerns relevant to preterm infants. In parallel, reported benefits of probiotics on the preterm gut microbiome, metabolome, and immune function are beginning to emerge. This review summarizes the current literature on the influence of probiotics on the gut microbiome of preterm infants, outlines potential mechanisms by which these effects are exerted, and highlights important clinical considerations for determining the best practices for probiotic use in premature infants.
More Related Videos
Related Concept Videos
Anatomy of the Intestines
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the...
Microorganisms in Medicine and Therapeutics
Bacterial Flora of the Large Intestine
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.

