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Volume 10, Number 6—June 2004

Research

Sporadic Cryptosporidiosis, North Cumbria, England, 1996–2000

Stella Goh*, Mark Reacher†Comments to Author , David P. Casemore‡, Neville Q. Verlander†, Rachel Chalmers§, Margaret Knowles¶, Joy Williams*, Keith Osborn#, and Sarah Richards**
Author affiliations: *Carlisle and District Primary Care Trust, Rosehill, Carlisle, United Kingdom; †Communicable Disease Surveillance Centre, London, United Kingdom; ‡University of Wales, Aberystwyth, Ceredigion, Wales, United Kingdom; §Singleton Hospital, Swansea, Wales, United Kingdom; ¶Cumberland Infirmary, Carlisle, United Kingdom; #United Utilities, Great Sankey, Warrington, United Kingdom; **West Cumberland Hospital, Whitehaven, United Kingdom

Main Article

Table 3

Baseline characteristics of study population

Characteristics
Cases (%) 152 (100)
Controls (%) 466 (100)
p value
Sex



M
82 (53.9)
236 (50.6)
0.539
F
70 (46.1)
230 (49.4)

Age, y



0–5
86 (56.6)
273 (58.6)
0.904
6–15
47 (30.9)
136 (29.2)

16+
19 (12.5)
57 (12.2)

Local government district



Allerdale
83 (54.6)
248 (53.2)
0.838
Copeland
69 (45.4)
218 (46.8)

Source of water/zone



Crummock Lake/Crummock North
37 (24.3)
103 (22.1)
0.941
Crummock Lake/Crummock South
19 (12.5)
49 (10.5)

Ennerdale Lake/Ennerdale North
29 (19.1)
101 (21.7)

Ennerdale Lake/Ennerdale South
13 (8.6)
43 (9.2)

Millom/Millom
19 (12.5)
54 (11.6)

Quarry Hill/Quarry Hill
16 (10.5)
41 (8.8)

Hausegill/Hausegill
3 (2.0)
5 (1.1)

Hayknott/Hayknott
2 (1.3)
6 (1.3)

Underscar/Underscar
1 (0.7)
3 (0.6)

Fellside/Fellside
0
1 (0.2)

Multiple sources/Mixed from >1 zone
11 (7.2)
51 (10.9)

Different private water supplies
2 (1.3)
9 (1.9)

Disruption of main supply in week before illness/outbreak?



Y
8 (5.3)
14 (3.0)
0.294
N
143 (94.1)
448 (96.1)

Not recorded
1 (0.7)
4 (0.9)

Water discolored in the week before illness or outbreak?



Y
14 (9.2)
33 (7.1)
0.398
N
130 (85.5)
431 (92.5)

Not recorded
8 (5.3)
2 (0.4)

Away from home in the 2 weeks before illness or outbreak?



Y
49 (32.2)
163 (35.0)
0.603
N
103 (67.8)
303 (65.0)

Sewage services to home



Mains
130 (85.5)
411 (88.2)

Septic tank
21 (13.8)
51 (10.9)

Chemical toilet
1 (0.7)
0

Not recorded 0 4 (0.9)

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