Table 2.
Mean INC and TDT (h) for various bacterial species or groups per site clusters.
| Testing site | Cluster 1 | Cluster 2 | Cluster 3 | Cluster 4 | Cluster 5 | TOT/Mn | |
|---|---|---|---|---|---|---|---|
| BHS | |||||||
| N | 139 | 299 | 40 | 76 | 20 | 0 | 574 |
| PI | 1.16 | 3.67 | 9.04 | 12.58 | 11.29 | – | 4.88 |
| INC | 12.09 | 9.67 | 8.45 | 7.17 | 7.17 | – | 9.75 |
| TDT | 13.24 | 13.34 | 17.50 | 19.75 | 18.47 | – | 14.64 |
| S. aureus | |||||||
| N | 522 | 827 | 132 | 87 | 42 | 0 | 1610 |
| PI | 1.40 | 3.78 | 9.26 | 13.35 | 15.84 | – | 4.29 |
| INC | 19.74 | 18.16 | 16.54 | 12.61 | 10.42 | – | 18.04 |
| TDT | 21.14 | 21.94 | 25.80 | 25.96 | 26.26 | – | 22.33 |
| E. coli | |||||||
| N | 612 | 973 | 176 | 215 | 96 | 17 | 2089 |
| PI | 1.52 | 4.00 | 9.80 | 13.15 | 12.87 | 21.05 | 5.25 |
| INC | 14.06 | 12.70 | 9.19 | 10.09 | 11.18 | 13.45 | 12.47 |
| TDT | 15.57 | 16.70 | 19.00 | 23.24 | 24.06 | 34.51 | 17.72 |
| CoNS | |||||||
| N | 486 | 652 | 88 | 56 | 28 | 5 | 1315 |
| PI | 1.64 | 3.87 | 9.20 | 11.31 | 15.92 | 17.66 | 4.03 |
| INC | 26.01 | 26.60 | 30.02 | 29.26 | 25.02 | 21.99 | 26.67 |
| TDT | 27.65 | 30.47 | 39.23 | 40.57 | 40.94 | 39.65 | 30.70 |
| Enterococcus spp | |||||||
| N | 322 | 232 | 48 | 30 | 7 | 8 | 647 |
| PI | 1.84 | 4.15 | 10.29 | 12.22 | 22.03 | 18.26 | 4.20 |
| INC | 17.85 | 15.41 | 12.25 | 13.25 | 8.04 | 6.01 | 16.09 |
| TDT | 19.68 | 19.56 | 22.53 | 25.47 | 30.07 | 24.28 | 20.29 |
| K. pneumoniae | |||||||
| N | 183 | 224 | 45 | 53 | 11 | 0 | 516 |
| PI | 1.48 | 4.14 | 9.99 | 11.44 | 14.60 | – | 4.68 |
| INC | 16.94 | 14.73 | 14.07 | 11.06 | 13.31 | – | 15.05 |
| TDT | 18.43 | 18.87 | 24.06 | 22.50 | 27.91 | – | 19.73 |
| VGS/ANG | |||||||
| N | 118 | 275 | 25 | 20 | 5 | 0 | 443 |
| PI | 1.38 | 3.80 | 8.91 | 15.72 | 10.01 | – | 4.19 |
| INC | 17.60 | 21.10 | 19.02 | 21.27 | 17.90 | – | 19.97 |
| TDT | 18.98 | 24.90 | 27.93 | 36.99 | 27.91 | – | 24.08 |
| S. pneumoniae | |||||||
| N | 83 | 107 | 23 | 20 | 9 | 4 | 246 |
| PI | 1.91 | 3.67 | 8.32 | 10.75 | 12.66 | 6.49 | 4.46 |
| INC | 12.89 | 12.11 | 11.78 | 10.54 | 11.85 | 7.13 | 12.12 |
| TDT | 14.79 | 15.78 | 20.09 | 21.30 | 24.51 | 13.63 | 16.58 |
| Other coliforms | |||||||
| N | 219 | 320 | 41 | 55 | 17 | 7 | 659 |
| PI | 2.39 | 4.09 | 10.13 | 13.16 | 12.96 | 17.63 | 5.03 |
| INC | 16.23 | 14.31 | 13.60 | 14.01 | 19.93 | 13.38 | 15.01 |
| TDT | 18.62 | 18.40 | 23.73 | 27.17 | 32.89 | 31.01 | 20.04 |
| NF | |||||||
| N | 97 | 82 | 15 | 11 | 12 | 0 | 217 |
| PI | 1.71 | 3.99 | 8.42 | 14.33 | 12.48 | – | 4.27 |
| INC | 21.89 | 24.64 | 15.44 | 31.47 | 9.91 | – | 22.31 |
| TDT | 23.60 | 28.63 | 23.85 | 45.80 | 22.40 | – | 26.58 |
N: number of isolates, PI: preincubation time, BHS: beta-hemolytic Streptococcus, CoNS: coagulase-negative Staphylococcus, VGS/ANG: viridans group Streptococcus and S. anginosus group, Mn: mean, NF: non-fermenting gram negative bacilli, TOT: total.