Table 3.

Flock SRLV prevalence in each continent. Data extracted from scientific literature published from 1981 to 2020.

Continent	Studies	N 1	Prevalence (%)		Range (%)		Heterogeneity	Refs
			Mean	CI 95% 2	Min	Max	I2 3 (p Value)
Africa	1	13	7.69	1.37–33.31	7.69	7.69	N/A 4	[21]
Asia	8	197	65.99	59.12–72.24	21.43	100.00	95.58 (<0.001)	5
Europe	35	4590	44.38	42.95–45.82	0.00	100.00	99.98 (<0.001)	6
North America	32	1933	48.58	46.35–50.81	0.00	100.00	95.26 (<0.001)	7
South and Central America	34	2358	18.87	17.34–20.50	0.00	100.00	83.15 (<0.001)	8
Global	110	9091	39.07	38.07. 40.08	0	100	99.94 (<0.001)

¹ N, number of animals tested; ² CI 95%, 95% confidence interval; ³ I², heterogeneity statistic; ⁴ N/A, not applicable; ⁵ [25,26,28,29,31,33,35]; ⁶ [11,36,37,38,39,40,41,42,45,47,48,49,51,54,55]; ⁷ [57,58,59,61,62,63,64,65,66]; ⁸ [67,69,71,72,73,74,75].