Field Epidemiological Investigation
Epidemic characteristics of human brucellosis in Yunnan Province from 2019 to 2021
Yang Qiuju, Yang Xiangdong, Yu Binbin, Shao Zongti
Published 2024-02-20
Cite as Chin J Endemiol, 2024, 43(2): 118-122. DOI: 10.3760/cma.j.cn231583-20221219-00409
Abstract
ObjectiveTo study the epidemic characteristics of human brucellosis in Yunnan Province, and to provide a reliable scientific basis for formulating accurate prevention and control strategies of brucellosis.
MethodsThe epidemic data of human brucellosis in Yunnan Province from January 2019 to December 2021 were collected from the information system of the China Center for Disease Control and Prevention, as well as annual monitoring data on brucellosis reported by various states (municipalities) in Yunnan Province. Descriptive epidemiological methods were adopted to analyze the epidemic situation, distribution characteristics (time, region, population), and serological and pathogenic monitoring results of brucellosis.
ResultsFrom 2019 to 2021, 1 408 cases of brucellosis were reported in Yunnan Province, with an average annual incidence of 1.00/100 000. The number of cases increased from 321 in 2019 to 701 in 2021, and the incidence increased from 0.68/100 000 in 2019 to 1.50/100 000 in 2021. The onset time was mainly from April to September (857 cases). The top 3 regions with the highest number of reported cases were Kunming City (483 cases), Qujing City (379 cases), and Honghe Hani and Yi Autonomous Prefecture (281 cases), accounting for 81.18% (1 143/1 408) of the total number of cases. The age of onset was mainly 20 - < 70 years old, accounting for 89.70% (1 263/1 408). There were 958 males and 450 females, with a sex ratio of 2.13 ∶ 1.00. Farmers were the main occupation, accounting for 84.02% (1 183/1 408). From 2019 to 2021, a total of 26 280 serum samples from key populations of brucellosis were monitored in Yunnan Province, with 572 positive serological tests and a positive rate of 2.18% (572/26 280). A total of 169 strains of Brucella were isolated from blood samples from hospitals throughout the province, including 155 strains of sheep type 3 and 14 strains of sheep type 1.
ConclusionsFrom 2019 to 2021, the incidence of human brucellosis in Yunnan Province has been on the rise, with a high incidence in summer and autumn. The main population affected is young and middle-aged male farmers. Therefore, it is necessary to strengthen disease monitoring and health education for key populations during the high incidence season.
Key words:
Brucellosis; Epidemic characteristics; Serologic tests; Pathogenic testing
Contributor Information
Yang Qiuju
School of Public Health, Dali University, Dali 671000, China
Yunnan Provincial Key Laboratory for Natural Focal Disease Control and Prevention, Yunnan Institute for Endemic Disease Control and Prevention, Dali 671000, China
Yang Xiangdong
Yunnan Provincial Key Laboratory for Natural Focal Disease Control and Prevention, Yunnan Institute for Endemic Disease Control and Prevention, Dali 671000, China
Yu Binbin
Yunnan Provincial Key Laboratory for Natural Focal Disease Control and Prevention, Yunnan Institute for Endemic Disease Control and Prevention, Dali 671000, China
Shao Zongti
Yunnan Provincial Key Laboratory for Natural Focal Disease Control and Prevention, Yunnan Institute for Endemic Disease Control and Prevention, Dali 671000, China
