Evidence map›Paper›PMID 31213639›Full record

ArticleScientific reports2019

Neonatal oral fluid as a transmission route for bifidobacteria to the infant gut immediately after birth.

Kazuya Toda, Ken Hisata, Takumi Satoh, Noriko Katsumata, Toshitaka Odamaki, Eri Mitsuyama, Takane Katayama, Tetsuya Kuhara, Kohzo Aisaka, Toshiaki Shimizu and 1 more

Abstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed.

  1. Review
  2. Article
  3. Synbiotic effects of 2'-fucosyllactose andFrontiers in nutrition · 2026
    Article
  4. Review
  5. Observational
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  7. Review
  8. The Oral Microbial Ecosystem in Age-Related Xerostomia: A Critical Review.International journal of molecular sciences · 2024
    Review
  9. Review
  10. Review
  11. Review
  12. Article
  13. Review
  14. Article
  15. Review
  16. Article
  17. Review
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  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors.

Kazuya TodaNext Generation Science Institute R&D Division, Morinaga Milk Industry Co., Ltd., Kanagawa, 252-8583, Japan. kazuya-toda983@morinagamilk.co.jp.
Ken HisataDepartment of Pediatrics and Adolescent Medicine, Juntendo University Graduate School of Medicine, Tokyo, 113-8421, Japan.
Takumi SatohDepartment of Molecular Microbiology, Tokyo University of Agriculture, Tokyo, 183-0051, Japan.
Noriko KatsumataNext Generation Science Institute R&D Division, Morinaga Milk Industry Co., Ltd., Kanagawa, 252-8583, Japan.
Toshitaka OdamakiNext Generation Science Institute R&D Division, Morinaga Milk Industry Co., Ltd., Kanagawa, 252-8583, Japan.
Eri MitsuyamaNext Generation Science Institute R&D Division, Morinaga Milk Industry Co., Ltd., Kanagawa, 252-8583, Japan.
Takane KatayamaDivision of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan.
Tetsuya KuharaNext Generation Science Institute R&D Division, Morinaga Milk Industry Co., Ltd., Kanagawa, 252-8583, Japan.
Kohzo AisakaDepartment of Obstetrics and Gynecology, Hamada Hospital, Tokyo, 101-0062, Japan.
Toshiaki ShimizuDepartment of Pediatrics and Adolescent Medicine, Juntendo University Graduate School of Medicine, Tokyo, 113-8421, Japan.
Jin-Zhong XiaoNext Generation Science Institute R&D Division, Morinaga Milk Industry Co., Ltd., Kanagawa, 252-8583, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Bifidobacteria are one of the most abundant bacterial groups in the infant gut microbiota and are closely associated with infant health and can potentially affect health in later life. However, the details regarding the source of bifidobacteria have yet to be completely elucidated. This study aimed to assess neonatal oral fluid (OF) as a transmission route for bifidobacteria to the infant gut during delivery. Neonatal OF and infant feces (IF) were collected immediately and one month after birth from 15 healthy vaginally delivered newborns. Bifidobacterium strains were isolated from OF and IF samples, and the similarity of strains between the OF-IF pairs was evaluated based on the average nucleotide identity (ANI) value. The 16S rRNA gene sequencing results revealed the presence of Bifidobacteriaceae at >1% relative abundance in all OF samples. Bifidobacterium strains were isolated from OF (9/15) and IF (11/15) samples, and those sharing high genomic homology (ANI values >99.5%) between the neonatal OF and IF samples were present in one-third of the OF-IF pairs. The results of this study indicate that viable bifidobacteria are present in neonatal OF and that OF at birth is a possible transmission route of bifidobacteria to the infant gut.

Indexed as

Bifidobacteriales InfectionsBifidobacteriumCluster AnalysisFecesFemaleGastrointestinal MicrobiomeGastrointestinal TractHumansInfantInfant, NewbornMaleMouthRNA, Ribosomal, 16SSalivaSequence Analysis, DNASpecies SpecificityRNA, Ribosomal, 16S

Identifiers

PMID31213639
PMCPMC6582144

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.