Related Experiment Video
Updated: Jul 6, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
Early differences in fecal microbiota composition in children may predict overweight
Marko Kalliomäki1, Maria Carmen Collado, Seppo Salminen
1Functional Foods Forum and Program on Health Biosciences and the Department of Pediatrics, University of Turku, Turku, Finland.
Insights
Early gut microbiota composition can predict childhood weight development. Lower bifidobacteria and higher Staphylococcus aureus in infancy indicate a higher risk of becoming overweight, suggesting potential for early intervention.
Area of Science:
- Microbiology
- Pediatrics
- Obesity Research
Background:
- Gut microbiota dysbiosis is linked to increased energy storage and obesity.
- Understanding early life microbial influences is crucial for addressing childhood obesity.
Purpose of the Study:
- To determine if early gut microbiota composition predicts weight development in early childhood.
- To investigate microbial markers associated with overweight and obesity in children.
Main Methods:
- Prospective follow-up study comparing normal-weight (n=24) and overweight/obese (n=25) children at age 7.
- Analysis of infant fecal microbiota using fluorescent in situ hybridization (FISH) and quantitative real-time polymerase chain reaction (qRT-PCR).
- Matching of control and case groups for key perinatal and infant factors.
Main Results:
- Infants who became overweight had significantly lower bifidobacterial counts (P=0.02) compared to normal-weight children.
- Higher Staphylococcus aureus levels were observed in infants who later became overweight (P=0.013).
- FISH and qRT-PCR analyses supported these findings regarding microbiota aberrancy.
Conclusions:
- Aberrant gut microbiota development in infancy precedes the onset of overweight in childhood.
- These findings highlight the gut microbiome's role in early weight regulation.
- Potential for novel preventive and therapeutic strategies targeting the gut microbiota for weight management.
Background:
Experimental studies suggest that gut microbiota deviations predispose toward energy storage and obesity.
Objective:
We wanted to establish whether early gut microbiota composition can guide weight development throughout early childhood.
Design:
Overweight and obese children (n = 25) were selected from a prospective follow-up study at the age of 7 y and identified according to the International Obesity Task Force criteria. Normal-weight children (n = 24) were selected from the same cohort and matched for gestational age and body mass index at birth, mode of delivery, probiotic supplementation, duration of breastfeeding, use of antibiotics during infancy, and frequencies of atopic diseases and atopic sensitization. Early fecal microbiota composition was analyzed by fluorescent in situ hybridization (FISH) with microscopic and flow cytometry detection and by quantitative real-time polymerase chain reaction (qRT-PCR).
Results:
The bifidobacterial numbers in fecal samples during infancy, as assessed by the FISH with flow cytometry, were higher in children remaining normal weight, [median: 2.19 x 10(9) cells/g (interquartile range: 1.10-5.28 x 10(9) cells/g)] than in children becoming overweight [1.20 x 10(9) cells/g (0.48-1.59x 10(9) cells/g); P = 0.02]. A similar tendency was found by FISH with microscopic detection and qRT-PCR. The microbiota aberrancy during infancy in children becoming overweight was also associated with a greater number of Staphylococcus aureus [0.64 x 10(6) cells/g (0.33-1.00 x 10(6) cells/g)] than in children remaining normal weight [0.27 x 10(6) cells/g (0.17-0.50 x 10(6) cells/g); P = 0.013].
Conclusion:
Aberrant compositional development of the gut microbiota precedes overweight, offering new possibilities for preventive and therapeutic applications in weight management.
Related Concept Videos
Development of Human Microbiota
Development of the Oral Microbiota
Anatomy of the Intestines
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the small...
Microbiota Modulation by Antibiotics
Dysbiosis of the Gut Microbiota
Introduction to the Human Microbiota
