Epidemiological analysis of human brucellosis in Ordos City, Inner Mongolia Autonomous Region from 2005 to 2017

Objective To analyze the epidemiological characteristics of human brucellosis in Ordos City from 2005 to 2017 and to provide evidence for prevention and control of the disease. Methods The data (regional distribution, time distribution and population distribution) of human brucellosis were collected and analyzed using the descriptive analysis method in Ordos City from 2005 to 2017. Results A total of 2 789 brucellosis cases were reported in Ordos City from 2005 to 2017 with an average incidence of 12.34/100 000, which was increasing (χ2trend = 1 588.449, P < 0.05). The time of onset concentrated on March to August. Brucellosis occurred in 8 of 9 banners in Ordos City and most of them came from Hanggin Banner and Dalad Banner, which were 39.19% (1 093/2 789) and 31.37% (875/2 789), respectively. The majority of cases were in middle-aged people (the 40-59 age group), accounting for 58.30% (1 626/2 789). The incidence of the male (13.42/100 000) was higher than that of the female (6.65/100 000). The occupation was dominated by farmers and herders, accounting for 61.42% (1 713/2 789) and 18.11% (505/2 789), respectively. Conclusions The number of cases of brucellosis in Ordos City is generally on the rise. The age of onset is mainly middle age, males are higher than females, occupations are mostly farmers and herders, and health education for key populations should be strengthened. Key words: Brucellosis; Epidemic characteristic; Disease control