Table 1.
Mean within-farm seroprevalence of Toxoplasma gondii in dairy sheep flocks and bivariable association with potential risk factors
| Variable | Level | Number of farms | Mean seroprevalence(%) | P-value* |
|---|---|---|---|---|
| Size of flock |
<300 |
14 |
42.4 |
<0.001 |
| |
300-400 |
10 |
33.5 |
|
| |
>400 |
9 |
24.0 |
|
| Production system |
Extensive |
30 |
35.9 |
0.088 |
| |
Intensive |
3 |
22.6 |
|
| Stagnant water used |
No |
21 |
31.3 |
0.05 |
| |
Yes |
12 |
40.7 |
|
| Separate water trough for young and adult animals |
No |
29 |
33.7 |
0.587 |
| |
Yes |
4 |
42.2 |
|
| Separate feed troughs for young and adult animals |
No |
10 |
31.3 |
0.948 |
| |
Yes |
23 |
36.18 |
|
| Purchased breeding animals in last 5 years |
No |
3 |
22.7 |
0.481 |
| |
Yes |
30 |
35.9 |
|
| Resident cats present on farm |
No |
10 |
28.4 |
0.122 |
| |
Yes |
23 |
37.4 |
|
| Stray cats occur on farm |
No |
0 |
– |
– |
| |
Yes |
33 |
34.7 |
|
| Access of stray cats to animal feed |
No |
7 |
32.4 |
0.715 |
| |
Yes |
26 |
35.3 |
|
| Access of stray cats to animals’ water |
No |
12 |
22.9 |
0.001 |
| Yes | 21 | 41.4 |
* From Poisson regression model with number tested as offset.