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Volume 14, Number 1—January 2008

Research

Cryptosporidiosis and Filtration of Water from Loch Lomond, Scotland

Kevin G.J. Pollock*Comments to Author , David Young†, Huw V. Smith‡, and Colin N. Ramsay*
Author affiliations: *Health Protection Scotland, Glasgow, Scotland, UK; †University of Strathclyde, Glasgow, Scotland, UK; ‡Scottish Parasite Diagnostic Laboratory, Glasgow, Scotland, UK;

Main Article

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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