Table 2.

Human and animal seroprevalence rates from serological investigations according to the Xi'an Brucellosis Prevention and Control Plan from 2014 to 2021.

Sampling year	Active surveillance regions	Humans tested	No. of positive cases	Human seroprevalence rate (%)	Animals tested	No. of positive cases	Animal seroprevalence rate (%)
2014–2021		4,263	59	1.38	2,56,424	1,822	1.54
2014	Gaolin, Lintong, and Zhouzhi	362	5	1.38	6,927	127	1.83
2015	Gaolin, Lintong, and Zhouzhi	317	2	0.63	8,519	144	1.69
2016	Gaolin, Lintong, and Chang'an	340	7	2.06	7,011	256	3.65
2017	Gaolin, Huyi, and Chang'an	309	1	0.32	11,834	307	2.59
2018	Huyi, Zhouzhi, and Chang'an	815	1	0.12	16,406	131	0.80
2019	Huyi, Zhouzhi, and Xixian new area	830	0	0	12,294	128	1.04
2020	Gaolin, Chang'an, and Xixian new area	753	21	2.79	1,00,164	536	0.54
2021	Gaolin, Chang'an, and Xixian new area	537	22	4.10	93,269	193	0.21