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Updated: Jun 14, 2026

Probiotic Studies in Neonatal Mice Using Gavage
Published on: January 27, 2019
[Effects of probiotics on intestinal bacterial colonization in premature infants]
1Department of Pediatrics, First Affiliated Hospital of Anhui Medical University, Hefei 230032, China.
Insights
Probiotics significantly reduced intestinal bacterial colonization and the incidence of diarrhea and sepsis in premature infants. This highlights their potential as a preventative therapy in vulnerable newborns.
Area of Science:
- Neonatal Medicine
- Microbiology
- Gastroenterology
Context:
- Premature infants are highly susceptible to intestinal dysbiosis and infections.
- Enterogenic infections pose a significant threat to the health and survival of premature infants.
Purpose:
- To investigate the efficacy of probiotics in reducing intestinal bacterial colonization and the occurrence of enterogenic infections in premature infants.
Summary:
- A randomized controlled trial involving 70 premature infants compared oral Clostridium butyricum with conventional treatment.
- Probiotic administration led to significantly lower intestinal bacterial colonization rates at 12 days and before discharge.
- The probiotic group experienced fewer cases of diarrhea and sepsis compared to the control group.
Impact:
- Probiotics demonstrate a protective effect against common intestinal pathogens in premature infants.
- This finding supports the use of probiotics as an adjunctive therapy to reduce infection risk in neonatal intensive care units.
Objective:
To study the possible roles of probiotics in decreasing intestinal bacterial colonization rate and the incidence of enterogenic infections in premature infants.
Methods:
Seventy premature infants were randomly assigned to two groups: probiotics and conventional treatment groups (control) (n=35 each). The probiotics treatment group was administered with oral Clostridium butyricum powder (250 mg, twice daily up to discharge) 24 hrs after birth except conventional treatment. Rectal swab cultures were done at admission, 5 and 12 days after admission, and before discharge. Clinical and laboratory findings were compared between the two groups.
Results:
The intestinal bacterial colonization rate in the probiotics treatment group was lower than that in the control group 12 days after admission (60% vs 83%; p<0.05) and before discharge (51% vs 80%; p<0.05). Klebsiella pneumoniae, Escherichia coli and Enterococcus faecium were common colonization bacteria in the two groups. Diarrhea occurred in 7 cases (20%) in the probiotics treatment group compared with 16 cases (46%) in the control group (p<0.05). Two infants (6%) developed sepsis in the probiotics treatment group compared with 9 cases (26%) in the control group (p<0.05).
Conclusions:
Probiotics can decrease intestinal bacterial colonization rate and the incidence of diarrhea and sepsis in premature infants.
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