Table 1.

Alpha diversities of microbiomes from different sampling locations.

Diversity	Anal skin	Anal fistula outer opening	Healthy buttock skin	Anal fistula inner opening	Healthy anal gland	Feces	Anal fistula
Chao1	199.73 ± 60.12	174.30 ± 36.45	225.71 ± 37.78	175.38 ± 58.89	228.42 ± 184.71	147.60 ± 41.63	176.73 ± 56.61*
ACE	199.88 ± 60.23	174.52 ± 36.50	225.79 ± 37.83	175.61 ± 58.98	228.75 ± 185.52	147.74 ± 41.63	176.93 ± 56.57*
Shannon	4.55 ± 0.61	4.55 ± 0.47	4.68 ± 0.59	4.16 ± 0.69	4.18 ± 1.00	3.68 ± 1.20	4.43 ± 0.93
Simpson	0.90 ± 0.06	0.91 ± 0.05	0.90 ± 0.04	0.86 ± 0.07	0.86 ± 0.08	0.79 ± 0.18	0.87 ± 0.10

*, statistically different from healthy buttock skin.