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Updated: Jun 9, 2025

Probiotic Studies in Neonatal Mice Using Gavage
Published on: January 27, 2019
[A prospective randomized controlled study on probiotics for the prevention of antibiotic-associated diarrhea in
Su-Wei Zhang1, Xian Zhi1, Meng-Yu Wang1
1Department of Pediatric Gastroenterology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221000, China.
Insights
Saccharomyces boulardii and Bifidobacterium effectively prevent antibiotic-associated diarrhea (AAD) in young children. Extended probiotic use further improves gut microbiota, reducing AAD incidence and duration.
Area of Science:
- Microbiology and Gastroenterology
- Pediatric Clinical Research
Background:
- Antibiotic-associated diarrhea (AAD) is a common adverse effect of antibiotic treatment in infants and young children.
- The gut microbiota plays a crucial role in maintaining gastrointestinal health, and its disruption by antibiotics can lead to AAD.
Purpose of the Study:
- To evaluate the efficacy of Saccharomyces boulardii and tetragenous viable Bifidobacterium in preventing AAD in pediatric patients.
- To assess the impact of different probiotic treatment durations on AAD incidence and gut microbiota composition.
Main Methods:
- A randomized controlled trial involving 182 children under three years old requiring antibiotic treatment.
- Participants were assigned to a control group, a Saccharomyces boulardii group, or a Bifidobacterium group, with varying probiotic durations (7, 14, 21 days).
- The incidence of AAD, duration of diarrhea, hospital stay, and fecal cocci-to-bacilli ratio were compared across groups.
Main Results:
- Both Saccharomyces boulardii and Bifidobacterium significantly reduced the incidence of AAD compared to the control group (P<0.017).
- AAD duration and hospital stay were shorter in probiotic groups (P<0.05).
- Probiotic interventions, especially with longer durations, positively modulated the fecal microbiota composition, indicated by a reduced cocci-to-bacilli ratio.
Conclusions:
- Saccharomyces boulardii and tetragenous viable Bifidobacterium are effective in preventing AAD in infants and young children.
- Extending the duration of probiotic therapy beyond short-term use can further enhance gut microbiota improvement and AAD prevention.
Objectives:
To evaluate the preventive effects of Saccharomyces boulardii powder and tetragenous viable Bifidobacterium tablets on antibiotic-associated diarrhea (AAD) in infants and young children.
Methods:
Children under three years old admitted to the Department of Pediatrics, Affiliated Hospital of Xuzhou Medical University due to non-gastrointestinal infections and requiring antibiotic treatment from July to December 2023 were enrolled. The children were randomly divided into a control group (n=47), a Saccharomyces boulardii group (n=70), and a Bifidobacterium group (n=65) using a random number table method. The control group received antibiotics and symptomatic supportive treatment according to relevant clinical guidelines. In addition to the treatment given to the control group, the Saccharomyces boulardii group and the Bifidobacterium group were respectively administered with Saccharomyces boulardii powder and tetragenous viable Bifidobacterium tablets. Based on the duration of probiotic use (7 days, 14 days, and 21 days), the Saccharomyces boulardii group was further divided into 7 d, 14 d, and 21 d subgroups, and similarly for the Bifidobacterium group. The incidence of AAD and ratio of cocci to bacilli in feces were compared among the groups after treatment.
Results:
The incidence rate of AAD in both the Saccharomyces boulardii group and the Bifidobacterium group was lower than that in the control group (P<0.017). The duration of AAD and the length of hospital stay were shorter in the Saccharomyces boulardii and Bifidobacterium groups compared to the control group (P<0.05). In the control group, the ratio of cocci to bacilli in feces on days 7, 14, and 21 was higher than on day 1 (P<0.05). Within-group comparisons showed that the ratio of cocci to bacilli in feces on day 14 in the Bifidobacterium 14 d and 21 d groups were lower than on day 1 (P<0.05); and the ratios on day 14 in the control group, Saccharomyces boulardii 14 d group, Saccharomyces boulardii 21 d group, Bifidobacterium 14 d group, and Bifidobacterium 21 d group were lower than on day 7 (P<0.05). The ratios on day 21 in the control group and the Saccharomyces boulardii 21 d group were lower than on days 7 and 14 (P<0.05). Between-group comparisons indicated that on day 7, the ratios of cocci to bacilli in feces in the Saccharomyces boulardii 7 d, 14 d, 21 d groups, and Bifidobacterium 7 d, 14 d, 21 d groups were all lower than in the control group (P<0.05); on day 14, the ratios of cocci to bacilli in feces 14 d and 21 d groups were lower than in the control group and the Bifidobacterium 7 d group (P<0.05).
Conclusions:
Both Saccharomyces boulardii and tetragenous viable Bifidobacterium can effectively improve gut microbiota and prevent the occurrence of AAD in infants and young children. Compared to short-term treatment, appropriately extending the duration of probiotic therapy can further improve the structure of gut microbiota.
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