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Updated: Jun 20, 2026

Probiotic Studies in Neonatal Mice Using Gavage
Published on: January 27, 2019
Early use of probiotics is important therapy in infants with severe congenital anomaly
Yutaka Kanamori1, Tadashi Iwanaka, Masahiko Sugiyama
1Department of Pediatric Surgery, University of Tokyo Hospital, Bunkyo-ku, Japan. kanamori-psu@h.u-tokyo.ac.jp
Insights
Probiotic therapy effectively restored normal gut bacteria in infants with severe congenital anomalies, preventing infections and promoting excellent physical growth despite complex health challenges.
Area of Science:
- Neonatal surgery
- Microbiome research
- Pediatric gastroenterology
Background:
- Infants with severe congenital anomalies often develop abnormal gut microbiota post-surgery and antibiotic treatment.
- This dysbiosis can lead to severe infections like necrotizing enterocolitis, impaired intestinal function, and poor nutritional status.
Purpose of the Study:
- To evaluate the efficacy of probiotic therapy as a supportive treatment for infants with severe congenital anomalies.
- To investigate the impact of probiotics on intestinal microbiota and physical growth in this vulnerable population.
Main Methods:
- Four infants with severe congenital anomalies received probiotic therapy with Bifidobacterium breve Yakult and Lactobacillus casei Shirota post-surgery.
- Intestinal microbiota composition and physical growth parameters were monitored throughout the treatment period.
Main Results:
- Probiotic therapy successfully shifted the intestinal microbiota from a dysbiotic state to a probiotic-dominant and then a commensal anaerobe-dominant profile, resembling normal microbiota.
- Pathogenic bacteria were rarely detected.
- Patients exhibited excellent physical growth, even with conditions like short bowel and pulmonary hypoplasia.
Conclusions:
- Probiotic therapy is effective in normalizing intestinal microbiota in infants with severe congenital anomalies.
- This normalization activated intestinal absorptive functions, completely preventing severe infections.
- All treated infants demonstrated positive physical development despite significant congenital disadvantages.
Background:
Infants with severe congenital anomaly often need to undergo operation followed by antibiotic therapy. As a result they inevitably acquire abnormal intestinal microbiota, which cause severe infections such as necrotizing enterocolitis. Also, intestinal function deteriorates and their nutritional state is very poor. In order to prevent these situations probiotic therapy is proposed as an effective supporting treatment. Probiotic therapy were therefore applied to infants with severe congenital anomaly as early as possible to ascertain its efficacy.
Methods:
As probiotics, two bacteria were used: Bifidobacterium breve Yakult and Lactobacillus casei Shirota. Probiotic therapy was used in four infants with severe congenital anomaly as early as possible after surgery. Their intestinal microbiota and physical growth were followed through the treatment course.
Results:
Two patients suffered from meconium peritonitis with ileal atresia. One patient was born with complex anomalies (omphalocele, bladder exstrophy, myelomeningocele). The fourth patient suffered from complete urorectal septum malformation. The intestinal microbiota of these four patients was first induced to be probiotic dominant and finally changed to commensal anaerobe dominant that was similar to normal intestinal microbiota. Pathogenic bacteria were seldom detected. The patients' physical growth was excellent despite short bowel and pulmonary hypoplasia.
Conclusion:
Probiotic therapy was effective in inducing probiotic dominant intestinal microbiota and normal intestinal microbiota in infants with severe congenital anomalies. As a result their intestinal absorptive functions were activated and severe infections were completely prevented. All of the infants grew well despite their physical disadvantages.
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