Table 1 Apparent animal seroprevalence and odds of B. ovis exposure for risk factors in Wyoming, USA
From: Seroprevalence and risk factors of Brucella ovis in domestic sheep in Wyoming, USA
Risk Factor | N | Seroprevalencea | Odds Ratio (95% CI) | P value |
|---|---|---|---|---|
Region | ||||
 Northeast | 298 | 0.39% (1/255) | Reference | – |
 Northwest | 255 | 1.68% (5/298) | 3.90 (0.59 to 103.51) | 0.346 |
 West | 832 | 0.48% (4/832) | 1.11 (0.15 to 30.48) | 0.927 |
 South-central | 572 | 1.57% (9/572) | 3.60 (0.66 to 90.16) | 0.346 |
 Southeast | 466 | 0.64% (3/466) | 1.51 (0.17 to 43.49) | 0.927 |
Gender | ||||
 Rams | 1477 | 0.95% (14/1477) | Reference | – |
 Ewes | 946 | 0.85% (8/946) | 0.90 (0.35 to 2.13) | 0.812 |
Age Groupsb | ||||
 Lambs | 147 | 0.00% (0/147) | – | – |
 Yearlings | 538 | 0.56% (3/538) | Reference | – |
 Adults | 1337 | 0.60% (8/1337) | 1.04 (0.29 to 5.02) | 0.955 |
 Aged | 220 | 2.27% (5/220) | 4.06 (0.95 to 21.20) | 0.118 |
Primary Breed Typeb | ||||
 Wool | 1083 | 0.28% (3/1083) | Reference | – |
 Meat | 402 | 1.24% (5/402) | 4.44 (1.04 to 23.12) | 0.044 |
 Multi-purpose | 890 | 1.35% (12/890) | 4.73 (1.48 to 21.79) | 0.014 |
Time of Sample Collection | ||||
 After Breeding | 754 | 0.53% (4/754) | Reference | – |
 Before Breeding | 1669 | 1.08% (18/1669) | 1.98 (0.73 to 7.06) | 0.191 |