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Table 2 Alpha diversity indexes calculated for the nasal swab (NS) and trans-tracheal aspiration (TTA) samples

From: Characterization of the upper and lower respiratory tract microbiota in Piedmontese calves

  TTA NS P value
Chao1 index 95.62 ± 78.48 720.74 ± 225.22 0.001
Observed species 40.57 ± 35.21 395.30 ± 152.62 0.001
Shannon index 1.46 ± 0.83 5.14 ± 1.74 0.001
Simpson index 0.45 ± 0.24 0.82 ± 0.13 0.001
  1. Chao1 index, observed species, Shannon’s diversity index, and Simpson index values are reported as mean ± standard error