Variable | Population | Pooled estimate prevalence (%) | 95% CI | Heterogeneity (χ2) | I2 (%) | P-value |
---|---|---|---|---|---|---|
World region | ||||||
 Global estimate | 59,086 | 48.25 | 41.82–54.67 | 33,292.86 | 99.7 | < 0.0001 |
 Africa | 16,154 | 47.85 | 36.04–59.66 | 9371.58 | 99.7 | < 0.0001 |
 Asia | 25,548 | 44.48 | 33.09–55.87 | 17,688.62 | 99.8 | < 0.0001 |
 Europe | 16,326 | 56.83 | 48.92–64.74 | 2380.45 | 99.1 | < 0.0001 |
 North and South America | 1058 | 34.46 | 19.90–49.01 | 89.80 | 95.5 | < 0.0001 |
Age | ||||||
 Young (≤ 1 year) | 18,188 | 38.30 | 27.21–49.38 | 8266.67 | 99.8 | < 0.0001 |
 Adult (> 1 year) | 18,188 | 49.53 | 38.02–61.03 | 7006.91 | 99.7 | < 0.0001 |
Sex | ||||||
 Male | 12,533 | 39.55 | 27.73–51.36 | 2288.98 | 99.6 | < 0.0001 |
 Female | 12,533 | 48.74 | 31.16–66.33 | 6151.18 | 99.8 | < 0.0001 |
Origin of sample | ||||||
 Abattoir | 49,124 | 47.72 | 40.53–44.90 | 29,650.45 | 99.8 | < 0.0001 |
 Farm | 9962 | 50.78 | 36.49–65.07 | 2658.55 | 99.5 | < 0.0001 |
Method of detection | ||||||
 Necropsy | 46,398 | 47.16 | 39.81–54.51 | 29,999.03 | 99.8 | < 0.0001 |
 Serology | 11,075 | 50.87 | 39.09–62.65 | 995.73 | 99.2 | < 0.0001 |
 Other | 1613 | 56.18 | 37.80–74.57 | 360.69 | 98.3 | < 0.0001 |
Study duration (months) | ||||||
 ≤ 6 | 12,200 | 49.19 | 37.73–60.64 | 3046.99 | 99.4 | < 0.0001 |
 > 6 to ≤ 12 | 19,908 | 52.23 | 40.57–63.89 | 18,701.79 | 99.8 | < 0.0001 |
 > 12 | 22,219 | 41.78 | 30.37–53.19 | 6898.52 | 99.7 | < 0.0001 |