First Report of Seroprevalence and Risk Factors of Neospora caninum Infection in Tibetan Sheep in China
Table 1
Seroprevalence of Neospora caninum in Tibetan sheep from different regions, genders, seasons, ages, and pregnancies in Gansu and Tibet provinces, China, tested by competitive-inhibition enzyme-linked immunosorbent assay.
Variable
Category
No. examined
Positive (%)
95% CI
P-value
OR (95% CI)
Region
Luqu
182
8 (4.4%)
1.4-7.4
>0.05
Reference
Maqu
588
48 (8.2%)
5.9-10.4
1.9 (0.9-4.2)
Tianzhu
962
90 (9.4%)
7.5-11.2
2.3 (1.1-4.7)
Nyingchi
455
38 (8.4%)
5.8-10.9
1.9 (0.9-4.3)
Sex
Male
638
69 (10.8%)
8.4-13.2
<0.01
1.5 (1.1-2.1)
Female
1549
115 (7.4%)
6.1-8.7
Reference
Season
Spring
480
41 (8.5%)
6.2-11.1
>0.05
1.4 (0.8-2.2)
Summer
398
45 (11.3%)
8.2-14.4
1.8 (1.1-2.9)
Autumn
479
31 (6.5%)
4.3-8.7
Reference
Winter
375
29 (7.7%)
5.0-10.4
1.2 (0.7-2.1)
No data
455
38 (8.4%)
5.8-10.9
1.3 (0.8-2.1)
Age (year)
0-1
447
45 (10.1%)
7.3-12.9
>0.05
1.9 (1.1-3.8)
≥1-2
413
27 (6.5%)
4.2-8.9
1.2 (0.6-2.5)
≥2-3
243
13 (5.4%)
2.5-8.2
Reference
≥3
1084
99 (9.1%)
7.4-10.9
1.8 (0.9-3.2)
Pregnancy
Not pregnant
581
49 (8.4%)
6.2-10.7
>0.05
1.2 (0.8-1.7)
Pregnant
796
59 (7.4%)
5.6-9.2
Reference
No data
810
76 (9.4%)
7.4-11.4
1.3 (0.9-1.9)
Total
2187
184 (8.4%)
7.3-9.6
95% CI, 95% confidence interval; OR, odds ratio. are grouped by age of year.
