Epidemiological characteristics of human brucellosis in Liaoning province, 2016–2020

  Objective   To analyze the epidemic dynamics and regularity of human brucellosis in Liaoning province from 2016 to 2020, and provide scientific evidence for the formulation and improvement of prevention and control strategies and measures, so as to reduce the loss caused to national health and economy.

  Methods   The data that the confirmed human brucellosis cases and the surveillance information of key populations with occupational exposure in Liaoning province from 2016 to 2020 were collected to describe and analyze three-dimension distribution and surveillance results.

  Results   A total of 11569 confirmed human cases and 1 death were reported in 14 cities of Liaoning province during the study period. The peak incidence of brucellosis was March to August, and the disease were mainly found focused on 40 to 64 years old people, mainly in farmers. In the monitoring of key populations with occupational exposure, epidemiological investigation included 68804 people, among which 32559 were tested serologically, and 1708 were positive, with a positive rate of 5.25%. Total of 830 samples were detected by etiology, and 210 strains of Brucella were isolated.

  Conclusion   The cases and incidence of brucellosis in Liaoning province increased year by year and reached a record high in 2020. The epidemic situation of human brucellosis is complicated, and the prevention and control situation of brucellosis is very grim. The strategies and measures need to be further optimized and improved.