Fig. 2

Diversity of E. coli in different age and health status groups. a Levels of E. coli diversity in the individual groups. The diversity is illustrated by percentages of participants in a group that have one, two or more genomic types among the E. coli strains analyzed. b Statistical comparisons of E. coli diversity among the four groups. ***: p < 0.0001 (Children vs Students, p-value = 3.291e-09; Children vs Seniors, p-value = 3.104e-10; Students vs Seniors, p-value = 7.226e-06; Seniors vs CRC patients, p-value = 6.83e-06; Students vs CRC patients, p-value = 0.0039; Children vs CRC patients, p-value = 0.8847.). Note that most CRC patients had only one genotype and most senior individuals had five or more genotypes