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Differences in developing intestinal microbiota between allergic and non-allergic infants: a pilot study in Japan

Prapa Songjinda1, Jiro Nakayama, Atsushi Tateyama

  • 1Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.

Bioscience, Biotechnology, and Biochemistry
|September 11, 2007
PubMed

Insights

Infant gut microbiome analysis revealed higher Bacteroidaceae populations in allergic infants at 1 and 2 months. This early difference in gut bacteria may be linked to allergy development in children.

Area of Science:

  • Microbiology
  • Pediatrics
  • Immunology

Background:

  • The infant gut microbiome plays a crucial role in immune system development.
  • Early life gut bacterial composition is increasingly linked to the risk of developing allergies.
  • Understanding these early microbial patterns can inform allergy prevention strategies.

Purpose of the Study:

  • To investigate the association between early-life fecal bacterial composition and allergy development in Japanese infants.
  • To quantify specific predominant bacterial groups in the infant gut during the first two months of life.

Main Methods:

  • Real-time PCR was used to quantify six predominant bacterial groups: Bacteroidaceae, Enterobacteriaceae, bifidobacteria, enterococci, lactobacilli, and Clostridium perfringens group.
  • Fecal samples were collected from 15 infants for the first 2 months of life.
  • Bacterial populations were compared between infants who developed allergies and those who did not by age 2 years.

Main Results:

  • A significantly higher population of Bacteroidaceae was observed in infants who developed allergies compared to non-allergic infants at both 1 month (P=0.03) and 2 months (P=0.05) of age.
  • No statistically significant differences were found in the populations of Enterobacteriaceae, bifidobacteria, enterococci, lactobacilli, or the Clostridium perfringens group between the allergic and non-allergic groups.

Conclusions:

  • Elevated levels of Bacteroidaceae in early infancy may be a potential biomarker for allergy development.
  • Further research is needed to elucidate the causal relationship between Bacteroidaceae and infant allergies.
  • Targeting specific gut bacteria in early life could be a future avenue for allergy prevention.

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