Seroprevalence and Associated Risk Factors of Brucellosis among Indigenous Cattle in the Adamawa and North Regions of Cameroon
Table 2
Risk factor model for brucellosis seropositivity in individual cattle in Adamawa and North Regions of Cameroon ().
Factor
Variable
Number (positive)
Seropositivity using i-ELISA 95% CI
Odds ratio 95% CI
value
Region
North
509 (31)
6.1% 4.0–8.2
1
-
Adamawa
522 (60)
11.5% 8.8–14.2
2.0 1.2–3.1
0.003
Locality
Vina
117 (2)
1.7% 0–4.0
1
-
Mbere
187 (12)
6.4% 2.9–9.9
3.9 0.9–17.9
0.076
Benoue
134 (21)
15.7% 9.5–21.8
10.7 2.4–46.6
0.002
Faro-et-Deo
218 (46)
21.1% 15.7–26.5
15.4 3.7–64.6
<0.0001
Mayo-Louti
117 (10)
8.5% 3.4–13.5
5.4 1.1–25.1
0.032
Mayo Rey
258 (0)
0%
Herd size
≤30
69 (2)
2.9% 1.0–6.8
1
-
30–59
279 (38)
13.6% 9.6–17.6
0.5 0.3–0.8
0.003
≥60
683 (51)
7.5% 5.5–9.5
0.2 0.0–0.8
0.024
Livestock systems
Semi-intensive
645 (55)
8.5% 6.3–10.6
1
-
Extensive
386 (36)
9.3% 6.4–12.2
1.1 0.7–1.7
0.662
Contact with wildlife
Yes
476 (46)
9.7% 7.0–12.3
1
-
No
555 (45)
8.1% 5.8–10.4
0.8 0.5–1.3
0.381
Knowledge of brucellosis
Yes
301 (15)
5.0% 2.5–7.5
1
-
No
339 (40)
11.8% 8.4–15.2
2.5 1.4–4.7
0.003
Occupational risk of brucellosis
Yes
164 (10)
6.1% 2.4–9.8
1
-
No
476 (48)
10.1% 7.4–12.8
1.7 0.8–3.5
0.129
Breed
Mbororo (red)
82 (5)
0.5% 0–2.0
1
-
Fulani (white)
167 (20)
1.9% 0–4.0
1.5 0.7–3.3
0.295
Gudali
715 (58)
5.6% 3.9–7.3
1.5 0.9–2.6
0.123
Crossbreed
67 (8)
0.8% 0–2.9
0.6 0.2–1.8
0.374
Sex
Female
852 (83)
9.7% 7.7–11.7
1
-
Male
179 (8)
4.5% 1.5–7.5
0.43 0.20–0.91
0.028
Age (years)
Young (≤4)
116 (8)
6.9% 2.3–11.5
1
-
Adult (5–8)
818 (65)
7.9% 6.0–9.7
1.6 0.9–2.8
0.087
Old (≥9)
97 (18)
18.6% 10.8–26.3
3.8 1.9–7.6
<0.0001
Body Condition Score
Poor (<3)
33 (1)
3.0% 0.0–8.8
1
-
Good (3-4)
887 (82)
9% 7.3–11.1
0.8 0.3–1.6
0.481
Very Good (>4)
111 (8)
7.2% 2.4–12.0
0.3 0–2.3
0.248
Abortion
Yes
310 (20)
6.5% 3.7–9.2
1
-
No
330 (35)
10.6% 7.3–13.9
1.7 1.0–3.0
0.063
Stillbirth
Yes
244 (19)
7.8% 4.4–11.2
1
-
No
394 (36)
9.1% 6.3–11.9
1.2 0.7–2.1
0.555
Retained placenta
Yes
162 (12)
8.0% 3.8–12.2
1
-
No
478 (42)
8.8% 6.3–11.3
1.1 0.6–2.1
0.765
Observed reactions of individual animals () or of animals of farmers who responded to questionnaire ( depends on number of animals of the farmer) were used in the category. Crossbreed between local breeds.
