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L. Reuteri SGL 01 in Nursing Mothers: Effects on Milk Microbiota and Neonatal Gut Colonization

Supplementation With L. Reuteri SGL 01 in Nursing Mothers: Evaluation of the Microbiota in Breast Milk and Intestinal Colonization in Newborns

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07404930
Acronym
Reuteri17
Enrollment
70
Registered
2026-02-12
Start date
2017-10-16
Completion date
2025-12-31
Last updated
2026-02-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Breastfeeding, Microbiota, Supplementation

Keywords

microbiota, breastfeeding, neonates

Brief summary

The Reuteri17 study is a spontaneous, prospective, randomized intervention study designed to evaluate the effects of maternal supplementation with the probiotic Lactobacillus reuteri SGL 01 on the composition of the breast milk microbiota and subsequent intestinal colonization of the newborn. The protocol involves the enrollment of 20 primiparous mothers of full-term, exclusively breastfed infants. Participants are divided into two groups: the first receives a daily supplement of 5 drops of Reuplus® (equivalent to 1 billion live cultures), while the second serves as a non-supplemented control group. The effectiveness of the intervention is monitored through two sampling moments: at baseline (T0) and after 30 days of treatment (T1). Specifically, 20 ml samples of breast milk and fecal samples from the newborns are collected. Bacterial DNA is extracted from these biological matrices and analyzed using real-time PCR at the University of Bologna, with the aim of quantifying changes in the microbiota and the transfer of the probiotic strain. To complete the investigation, mothers are given a nutritional questionnaire to correlate the results with dietary habits. The study aims to confirm that maternal oral supplementation can be an effective strategy for modulating the bacterial heritage of newborns during the first months of life.

Interventions

DIETARY_SUPPLEMENTprobiotic Lactobacillus reuteri SGL 01

5 drops of supplement based on lactic acid bacteria consisting exclusively of Lactobacillus Reuteri SGL 01

Sponsors

IRCCS Azienda Ospedaliero-Universitaria di Bologna
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Primiparous women, mothers of full-term infants who are breastfed. * Written informed consent; * Age over 18 years.

Exclusion criteria

* Drug therapies that are contraindicated for breastfeeding * Maternal conditions that are contraindicated for breastfeeding * Neonatal formula milk feeding * Antibiotic treatments

Design outcomes

Primary

MeasureTime frameDescription
Changes in the concentration of Lactobacillus, Bifidobacterium, Clostridium and Bacteroides spp. in maternal milk samples between T0 and T130 daysBacterial DNA was extracted from 2 mL of milk samples, stored at -80 °C after collection, using the QIAamp DNA Mini Kit (Qiagen, West Sussex, UK). Bacterial counts (log CFU/ml milk) were based on rRNA gene copy numbers retrieved from the rRNA copy number database. Mann-Whitney U test was used to compare the concentration of Lactobacillus, Bifidobacterium, Clostridium and Bacteroides spp. in milk samples at T0 and T1 between the study groups. Wilcoxon signed rank test was used to compare the concentration of Lactobacillus, Bifidobacterium, Clostridium and Bacteroides spp. in milk samples between T0 and T1 within each study group. Significance level was set at P \<0.05.
Changes in the concentration of Lactobacillus, Bifidobacterium, Clostridium and Bacteroides spp. in neonatal fecal samples between T0 and T130 daysBacterial DNA was extracted from 250 mg of neonatal fecal samples, stored at -80 °C after collection, using the QIAamp DNA Mini Kit (Qiagen, West Sussex, UK). Bacterial counts (log CFU/g feces) were based on rRNA gene copy numbers retrieved from the rRNA copy number database. Mann-Whitney U test was used to compare the concentration of Lactobacillus, Bifidobacterium, Clostridium and Bacteroides spp. in neonatal fecal samples at T0 and T1 between the study groups. Wilcoxon signed rank test was used to compare the concentration of Lactobacillus, Bifidobacterium, Clostridium and Bacteroides spp. in fecal samples between T0 and T1 within each study group. Significance level was set at P \<0.05.

Countries

Italy

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 13, 2026