Table 2.
Distribution of herd level prevalence of Q fever based on iELISA using bulk milk.
| Variable | Tested | Positive (>40%) | Prevalence | 95% CI |
χ
2 test P value |
|---|---|---|---|---|---|
| District | <0.01 | ||||
| Satkhira | 28 | 2 | 7.1 | 0.9–23.5 | |
| Chittagong | 55 | 6 | 10.9 | 4.1–22.2 | |
| Sirajganj | 26 | 9 | 34.6 | 17.2–55.6 | |
| Number of lactating cows | 1 | ||||
| >5 | 22 | 3 | 13.6 | 2.9–34.9 | |
| 1 to 5 | 87 | 14 | 16.1 | 9.1–15.5 | |
| Breed composition | 0.29 | ||||
| Sahiwal cross | 18 | 2 | 11.1 | 1.4–34.7 | |
| Friesian cross | 73 | 10 | 13.7 | 6.8–23.8 | |
| Both | 18 | 5 | 27.8 | 9.7–53.5 |
The other two bulk milk samples were collected from two government goat farms in Savar, Dhaka, and Rajshahi Districts; CI: Confidence Interval.