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. 2021 Apr 21;21:373. doi: 10.1186/s12879-021-06029-3

Fig. 2.

Fig. 2

The bacterial microbiota in semen samples positive and negative for HPV. No difference was observed in diversity as measured by Chao1 index (a) and Shannon index (b) between HPV-positive (blue) and HPV-negative (red) semen samples. The relative abundances of bacteria are presented on the phylum (c) and family (d) levels