Median Cryptosporidium antigen response (% of PC) and percentage of persons with a strong response (2004–2005)
| Site . | N . | Median response (95% CI) . | Percentage with a strong response (≥20% PC) . | ||
|---|---|---|---|---|---|
| 15/17-kDa . | 27-kDa . | 15/17-kDa . | 27-kDa . | ||
| A (SW) | 49 | 59 (36–94) | 69 (53–82) | 78 | 92 |
| B (SW) | 50 | 47 (41–61) | 84 (63–96) | 78 | 94 |
| C (GW) | 50 | 39 (19–58) | 56 (49–73) | 62 | 92 |
| D (BF) | 49 | 20 (9–33) | 37 (28–55) | 49 | 73 |
| E (GW) | 52 | 25 (19–50) | 59 (48–67) | 63 | 92 |
| F (BF) | 49 | 52 (31–70) | 73 (58–82) | 73 | 84 |
| All | 299 | 40 (32–47) | 61 (56–68) | 67 | 88 |
| Site . | N . | Median response (95% CI) . | Percentage with a strong response (≥20% PC) . | ||
|---|---|---|---|---|---|
| 15/17-kDa . | 27-kDa . | 15/17-kDa . | 27-kDa . | ||
| A (SW) | 49 | 59 (36–94) | 69 (53–82) | 78 | 92 |
| B (SW) | 50 | 47 (41–61) | 84 (63–96) | 78 | 94 |
| C (GW) | 50 | 39 (19–58) | 56 (49–73) | 62 | 92 |
| D (BF) | 49 | 20 (9–33) | 37 (28–55) | 49 | 73 |
| E (GW) | 52 | 25 (19–50) | 59 (48–67) | 63 | 92 |
| F (BF) | 49 | 52 (31–70) | 73 (58–82) | 73 | 84 |
| All | 299 | 40 (32–47) | 61 (56–68) | 67 | 88 |
PC, positive control; SW, surface water; GW, groundwater; BF, river-bank infiltration; N, number of samples; 95% CI, 95% confidence interval.