Figure 4
Ten most abundant bacterial species identified in samples from the following studies: (A) Jie et al.68; (B) Zuo et al.67; (C) Baragetti et al.60; (D) Karlsson et al.59; (E) Mitra et al.61; (F) Million et al.66. The results of Escherichia coli were omitted for simplification since this species was detected in all samples from all studies.
