Tf was also the most common bacterial species found in samples of patients with type 2 diabetes mellitus and in the control group, the prevalence being 100% in both groups, followed by Td (82.0% vs 91.0% respectively), Pg (72.7% vs 68.1%), Pi (45.5% vs 59.1%), and Aa (22.7% vs 18.1%) (Table 4). This evidence concerns the gene TF and type 2 diabetes mellitus.