Table 2: Distribution of contaminants among various sources of water used on poultry farms.
| Isolate |
Sources of Water |
| Stream (n=1) |
Tap (n=31) |
Well (n=33) |
Borehole (n=35) |
| N |
%a
|
%b
|
N |
%a
|
%b
|
N |
%a
|
%b
|
N |
%a
|
%b
|
| E. coli |
0 |
0 |
0 |
7 |
22.6 |
7 |
12 |
36.4 |
12 |
12 |
34.3 |
12 |
| S. typhi |
1 |
100 |
1 |
11 |
35.5 |
11 |
13 |
39.4 |
13 |
11 |
31.4 |
11 |
| S. aureus |
1 |
100 |
1 |
20 |
64.5 |
20 |
22 |
66.7 |
22 |
21 |
60 |
21 |
| CoNS |
0 |
0 |
0 |
6 |
19.4 |
6 |
8 |
24.2 |
8 |
5 |
14.3 |
5 |
| Faecal Enterococci
|
0 |
0 |
0 |
14 |
45.2 |
14 |
16 |
48.5 |
16 |
26 |
74.3 |
26 |
| Total coliforms |
1 |
100 |
1 |
30 |
96.8 |
30 |
33 |
100 |
33 |
33 |
94.3 |
33 |
n: number of water samples per source; N: Number of samples from water source contaminated by organism; CoNS: Coagulase-negative Staphylococci; %a: Percentage of samples per source of water; %b: Percentage of samples per total water samples.