Table 3 Multiple pairwise comparisons of L. pneumophila srg 1 least squares means between co-cultures with different initial levels of heterotrophic plate count (HPC) and controls (no HPC added) at different times from inoculum
From: Factors influencing persistence of Legionella pneumophilaserogroup 1 in laboratory cocultures
Time from inoculum (day) | Treatment comparison (HPC initial concentrations; CFU/ml) | Mean difference of marginal means control - treatment (standard error) | t-ratio | P-value |
|---|---|---|---|---|
0 | 0– 10 | 0.01 (0.10) | 0.08 | 0.99 |
0− 100 | −0.4 (0.11) | −0.37 | 0.93 | |
4 | 0− 10 | −0.24 (0.12) | −2.00 | 0.12 |
0− 100 | −0.39 (0.14) | −2.84 | 0.02 | |
8 | 0− 10 | −2.21 (0.39) | −5.68 | <0.001 |
0− 100 | −2.15 (0.45) | −4.79 | <0.001 | |
16 | 0− 10 | −2.86 (0.34) | −8.52 | <0.001 |
0− 100 | −3.09 (0.39) | −7.96 | <0.001 |