Volume 8, Number 6—June 2002
Research
Cryptosporidium Oocysts in a Water Supply Associated with a Cryptosporidiosis Outbreak
Table 2
Results of 10-L grab samples taken within distribution range of water works during investigationa of cryptosporidial outbreak, Clitheroe, March 16–April 6, 2001
Date | Samples taken | Samples positive | Oocyst counts of positive samples/L | ||||
---|---|---|---|---|---|---|---|
16 Mar | 3 | 1 | 0.5 | ||||
17 Mar | 6 | 5 | 0.1 | 0.2 | 0.1 | 0.2 | 0.1 |
18 Mar | 8 | 4 | 0.2 | 0.2 | 0.3 | 0.3 | |
19 Mar | 8 | 5 | 0.2 | 0.3 | 0.1 | 0.1 | 0.2 |
20 Mar | 9 | 5 | 0.1 | 0.2 | 0.9 | 0.5 | 0.1 |
21 Mar | 23 | 5 | 0.2 | 0.1 | 0.1 | 0.4 | 0.1 |
22 Mar | 16 | 4 | 0.1 | 0.1 | 0.1 | 0.1 | |
23 Mar | 15 | 2 | 0.1 | 0.2 | |||
24 Mar | 15 | 2 | 0.1 | 0.1 | |||
25 Mar | 12 | 2 | 0.1 | 0.1 | |||
26 Mar | 12 | 0 | |||||
27 Mar | 9 | 0 | |||||
28 Mar | 3 | 2 | 0.3 | 0.4 | |||
29 Mar | 3 | 0 | |||||
30 Mar | 6 | 3 | 0.1 | 0.2 | 0.4 | ||
31 Mar | 9 | 3 | 0.1 | 0.1 | 0.6 | ||
1 Apr | 7 | 1 | 0.1 | ||||
2 Apr | 7 | 1 | 0.1 | ||||
3 Apr | 6 | 2 | 0.1 | 0.1 | |||
4 Apr | 6 | 0 | |||||
5 Apr | 6 | 0 | |||||
6 Apr |
3 |
0 |
|||||
a Total volume examined each day (in L) = 10 X number of samples taken. |