TABLE 2.
Means and P values for storage method and depth for bacterial concentrations and bacterial prevalence in the winter-spring cyclea
| Parameter | Concn (log10 CFU g−1)b |
Prevalence (%) |
||||||
|---|---|---|---|---|---|---|---|---|
| Total E. coli | Total enterococci | Total E. coli | AzithromycinR E. coli | TetracyclineR E. coli | Total enterococci | TylosinR enterococci | TetracyclineR enterococci | |
| Storage methodc,d | ||||||||
| Composting | 1.45 A | 1.81 A | 58 A | 5 A | 10 A | 96 A | 82 A | 85 A |
| Stockpiling | 0.22 B | 0.32 B | 18 B | 1 B | 5 B | 62 B | 31 B | 27 B |
| Depth from surface (cm)c,d | ||||||||
| 2.5 | 1.17 A | 1.54 A | 44 | 2 A | 13 A | 92 A | 69 A | 69 A |
| 45.7 | 0.76 B | 0.98 B | 38 | 6 B | 6 B | 86 A | 59 A | 58 A |
| 76.2 | 0.58 B | 0.68 B | 32 | 2 A | 5 B | 60 B | 42 B | 42 B |
| P value | ||||||||
| Method | <0.001 | <0.001 | 0.002 | <0.001 | 0.031 | <0.001 | <0.001 | <0.001 |
| Depth | 0.008 | 0.001 | 0.113 | 0.016 | <0.001 | <0.001 | 0.003 | <0.001 |
a
Statistics for interaction terms can be found in Table S3.
b
Antibiotic-resistant E. coli and enterococci were not quantifiable.
c
Values followed by a letter combination sharing one or more letters are not statistically different at the P value of <0.05 based on Tukey’s post hoc test.
d
Values are treatment averages which were calculated based on all data for one particular treatment level.