Volume 14, Number 1—January 2008
Research
Cryptosporidiosis and Filtration of Water from Loch Lomond, Scotland
Kevin G.J. Pollock*
, David Young†, Huw V. Smith‡, and Colin N. Ramsay*
, David Young†, Huw V. Smith‡, and Colin N. Ramsay*
Table 5
Exposure to cryptosporidiosis risk factors before and after the introduction of enhanced water filtration at Loch Lomond, Scotland*
| Risk factor reported | Loch Lomond, no. (%) |
Other, no. (%) |
|||
|---|---|---|---|---|---|
| Before filtration | After filtration | Before filtration | After filtration | ||
| Tap water consumption | 296 (95.2) | 146 (96.7) | 546 (89.5) | 962 (95.9) | |
| Recreational water contact | 73 (23.5) | 89 (59.2) | 183 (29.7) | 480 (47.2) | |
| Camping | 37 (11.9) | 33 (22.1) | 81 (13.1) | 183 (18.0) | |
| Pets | 21 (6.8) | 12 (8.0) | 41 (6.6) | 120 (11.9) | |
| Travel outside area | 12 (3.9) | 55 (36.2) | 91 (14.6) | 295 (28.8) | |
| Contact with case | 7 (2.3) | 4 (2.7) | 15 (2.4) | 19 (1.9) | |
| Contact with farm animals | 33 (10.6) | 11 (7.3) | 105 (17.0) | 142 (14.0) | |
*Enhanced water filtration is coagulation and rapid gravity filtration, introduced in November 1999.
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