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Table 1 Amalgamated national (Nigeria) AAT prevalence 1960–2017

From: A meta-analysis of the prevalence of African animal trypanosomiasis in Nigeria from 1960 to 2017

Attribute No. of studies examined/total samples examined Prevalence (95% CI) (%) Measure of heterogeneity (Cochran’s Q) % Variation; I2 (95% CI) P-value
National 74 (53,924) 16.1 (12.3–20.3) 11830.19 99.4 (99.3–99.4) P < 0.0001
 Northern region 54 (32,134) 15.9 (11.1–21.4) 8311.08 99.4 (99.3–99.4) P < 0.0001
 Southern region 24 (22,055) 19.9 (14.0–26.5) 2890.36 99.2 (99.1–99.3) P < 0.0001
Cattle 55 (40,863) 17.0 (12.3–22.2) 9383.29 99.4 (99.4–99.5) P < 0.0001
 Microscopy 45 (31,135) 13.0 (10.0–16.2) 2749.86 98.4 (98.2–98.6) P < 0.0001
T. vivax 32 (16,942) 8.2 (5.7–11.1) 1183.98 97.4 (96.9–97.8) P < 0.0001
T. congolense 32 (16,942) 2.8 (1.7–4.3) 725.89 95.7 (94.8–96.5) P < 0.0001
T. brucei 32 (16,942) 1.7 (0.7–3.1) 1076.37 97.1 (96.6–97.6) P < 0.0001
 Serology 2 (1175) 21.0 (17.9–24.4) 1.57 36.4 (0.0–0.0) P < 0.0001
T. vivax 2 (1175) 7.1 (5.7–8.7) 0.20 0.0 (0.0–0.0) P = 0.67
T. congolense 2 (1175) 9.0 (7.4–10.7) 0.34 0.0 (0.0–0.0) P = 0.60
T. brucei 2 (1175) 2.0 (0.7–4.1) 3.23 69.0 (0.0–93) P = 0.07
 PCR 7 (8672) 25.5 (10.5–44.4) 793.26 99.2 (99.0–99.4) P < 0.0001
T. vivax 5 (8022) 9.5 (2.1–21.2) 231.15 98.3 (97.4–98.9) P < 0.0001
T. congolense 3 (7754) 25.1 (16.7–34.4) 37.26 94.6 (87.9–97.7) P < 0.0001
T. brucei 6 (8522) 4.5 (2.3–7.4) 56.50 91.2 (83.5–95.3) P < 0.0001
Goats 15 (6270)     
 Microscopy 14 (6065) 3.7 (2.2–5.5) 143.92 91.0 (86.6–93.9) P < 0.0001
T. vivax 12 (5783) 1.3 (0.6–2.2) 84.21 86.9 (78.9–91.9) P < 0.0001
T. congolense 12 (5783) 0.74 (0.3–1.3) 50.70 78.3 (62.6–87.4) P < 0.0001
T. brucei 12 (5783) 0.59 (0.1–1.4) 94.37 88.3 (81.5–92.6) P < 0.0001
 PCR 1 (205) 71.7 (65.2–77.4)
T. vivax 1 (205) 71.7 (65.2–77.4)
Sheep 13 (4089) 7.7 (3.3–13.7) 453.06 97.4 (96.5–98.0) P < 0.0001
 Microscopy 13 (4089) 7.7 (3.3–13.7) 453.06 97.4 (96.5–98.0) P < 0.0001
T. vivax 8 (2699) 2.6 (0.3–7.0) 198.47 96.5 (94.7–97.6) P < 0.0001
T. congolense 8 (2699) 2.4 (0.7–5.1) 92.80 92.5 (87.5–95.5) P < 0.0001
T. brucei 8 (2699) 1.1 (0.2–2.9) 74.50 90.6 (83.9–94.5) P < 0.0001
Pig 2 (900)     
 Microscopy 1 (189) 3.2 (1.5–6.8)
T. brucei 1 (189) 3.2 (1.5–6.8)
 Serology 1 (189) 27.0 (21.2–33.7)
T. brucei 1 (189) 27.0 (21.2–33.7)
 PCR 1 (712) 16.6 (14.0–19.5)
T. congolense 1 (712) 4.6 (3.3–6.4)
T. brucei 1 (712) 8.9 (7.0–11.2)
Horse 1 (243) 1.7 (0.6–4.2)
Camel 1 (200) 31.5 (25.5–38.2)
  1. Abbreviations: CI confidence interval, I inconsistency or variation