TABLE 2.
Frequency and density of F+ DNA and RNA coliphages in surface water samples
| Land usage | Condition | No. of samples collected | Season | No. of samples collected | Location or condition | Frequency of detection (no. of samples positive/total) | Location | Log10 geometric meana (SD)
|
|
|---|---|---|---|---|---|---|---|---|---|
| Baseflow | Storm | ||||||||
| Human | Baseflow | 45 | Fall | 14 | UNC | 19/32 | UNC | 0.55 (1.01) | 2.06 (0.58) |
| Storm | 10 | Winter | 6 | Storm | 2/2 | UMass | 1.22 (0.88) | 0.38 (0.90) | |
| Spring | 13 | UMass | 11/13 | ||||||
| Summer | 22 | Storm | 6/8 | ||||||
| Bovine | Baseflow | 25 | Fall | 5 | Baseflow | 16/25 | UNC | 0.74 (0.93) | 3.23 (1.47) |
| Storm | 9 | Winter | 6 | Storm | 8/9 | ||||
| Spring | 13 | ||||||||
| Summer | 10 | ||||||||
| Background | Baseflow | 50 | Fall | 13 | UNC | 8/32 | UNC | 0.48 (1.24) | 2.60 (0.28) |
| Storm | 23 | Winter | 11 | Storm | 4/5 | UMass | 1.18 (0.79) | 0.36 (0.57) | |
| Spring | 19 | UMass | 14/18 | ||||||
| Summer | 30 | Storm | 10/18 | ||||||
| Swine | Baseflow | 20 | Fall | 7 | Baseflow | 11/20 | UNC | 0.097 (0.55) | 1.89 |
| Storm | 1 | Winter | 0 | Storm | 1/1 | ||||
| Spring | 6 | ||||||||
| Summer | 8 | ||||||||
a
Values are density in numbers of PFU per gram or liter.