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Two-by-two table of Nose Creek 2021 routine Airdrie stormwater samples positive for A. butzleri (hsp60), human sewage marker (HF183), both, or neither (n = 38)
| HF183 detected | HF183 not detected | |
|---|---|---|
| A. butzleri detected | 16 | 5 |
| A. butzleri not detected | 6 | 11 |
