Related Experiment Videos
Effect of iron on neonatal gut flora during the first three months of life
Insights
Iron supplementation in infant formula significantly alters neonatal gut microbiota. Unfortified cow
Area of Science:
- Neonatal gut microbiota research
- Infant nutrition and microbial ecology
Background:
- The gut microbiota plays a crucial role in infant health.
- Understanding the impact of infant feeding practices on gut flora is essential.
Purpose of the Study:
- To investigate the effect of iron-supplemented cow's milk formula on the gut microbiota of neonates.
- To compare the gut flora of breast-fed infants with those fed iron-fortified and unfortified cow's milk preparations.
Main Methods:
- Faecal specimens were collected from infants during the first 12 weeks of life.
- Infants were categorized into three groups: breast-fed, iron-fortified formula-fed, and unfortified formula-fed.
- Bacterial populations, including Escherichia coli and Bifidobacteria, were analyzed.
Main Results:
- Breast-fed infants showed predominant Bifidobacteria and low Escherichia coli counts.
- Infants on iron-fortified formula had high Escherichia coli counts and low Bifidobacteria.
- Infants on unfortified formula had Escherichia coli counts that were high, but Bifidobacteria and Bacteroides profiles were similar to breast-fed infants.
Conclusions:
- Iron fortification in infant formula significantly alters the neonatal gut microbiota composition.
- Unfortified cow's milk preparation supports a gut flora profile more similar to breast-fed infants.
- Neonatal gut flora is sensitive to iron content in milk preparations.
Abstract:
To study the effect of milk supplemented with iron on neonatal gut flora, faecal specimens of ten infants receiving breast milk, six receiving a cow-milk preparation supplemented with iron (5 mg/l) and seven receiving the same product without iron supplement (iron concentration less than 0.5 mg/l) were examined during the first 12 weeks of life. In breast-fed infants bifidobacteria was predominant, counts of Escherichia coli were low, and other bacteria were rarely present. Infants receiving fortified cow-milk preparation had high counts of Escherichia coli, counts and isolation frequency of bifidobacteria were low and other bacteria were frequently isolated. In those on unfortified cow-milk preparation isolation frequency of Escherichia coli, bifidobacteria and bacteroides was comparable with that in breast-fed infants; however, counts of Escherichia coli were high. It is concluded that the faecal flora of infants fed unfortified cow-milk preparation acquires characteristics of that found in breast-fed infants.