descriptive
Analysis v1
Strong Support
More than half of all infants carry bacteria that produce colibactin and have the pks gene cluster during their first two years of life. These bacteria are most commonly found between 6 and 12 months in healthy full-term babies, and between 12 and 24 months in babies cared for in neonatal intensive care units. This pattern suggests that such bacterial carriage is a typical part of early gut microbiome development.
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Evidence from Studies
Supporting (1)
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Community contributions welcome
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Colibactin genes are highly prevalent in the developing infant gut microbiome
Cross-Sectional Study
Human
2025 Dec 31This study found that more than half of babies have these special bacteria in their tummies during their first two years, which means it's normal and common—not something weird or rare.
Contradicting (0)
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Community contributions welcome
No contradicting evidence found
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.