Fig. 5

Body regions investigated in microbiome projects with human cohorts, FY2012–2016. This figure depicts human cohort studies of the microbiome, which totaled $376M over fiscal years 2012–2016. Six major body regions were investigated in these studies with human cohorts, and included gastrointestinal tract, urogenital tract, lung, oral, nares, and skin. Some cohort studies included the simultaneous study of multiple body regions and were noted as “Multiple body regions.” Those studies which focused on six additional body regions or tissues (blood, ear, eye, liver, cardiovascular system, central nervous system) were combined into ‘Other’