['Type 1 diabetes is the product of a complex interplay between genetic susceptibility and exposure to environmental factors. Existing bacterial profiling studies focus on people who are most at risk at the time of diagnosis; there are limited data on the gut microbiota of people with long-standing Type\xa01 diabetes. This study compared the gut microbiota of patients with Type\xa01 diabetes and good glycaemic control and high levels of physical-fitness with that of matched controls without diabetes.', 'Ten males with Type\xa01 diabetes and ten matched controls without diabetes were recruited; groups were matched for gender, age, BMI, peak oxygen uptake (VO', 'Faecalibacterium\xa0sp., Roseburia\xa0sp. and Bacteroides\xa0sp. were typically the most abundant members of the community in both patients with Type\xa01 diabetes and controls, and were present in every sample in the cohort. Each bacterial profile was relatively individual and no significant difference was reported between the bacterial profiles or the Shannon diversity indices of Type\xa01 diabetes compared with controls. The functional profiles were more conserved and the Type\xa01 diabetes group were comparable with the control group.'] Is gut microbiota of Type 1 diabetes patients with good glycaemic control and high physical fitness similar to people without diabetes : an observational study?