An analysis of risk factors for brucellosis in employees working in the sheep market in Tongxiang of Zhejiang Province, 2010-2015 / 中华地方病学杂志

ABSTRACT

Objective To understand the epidemiological characteristics of brucellosis among risk population and analysis risk factors, and to provide a reference basis for prevention and treatment of brucellosis. Methods Retrospective survey method was used to collect information on brucellosis and epidemiologically confirmed cases in Tongxiang City from 2010 to 2015. The employees gender, age, occupation, job seniority, contact area, contact history to abortion cub and with or without protection measures were analyzed by single factor and multiple factors analysis, calculate odds ratio (OR) and 95%confidence interval (CI). Results Totally 1 450 people were investigated and 43 were confirmed positive (2.97%),new cases were 37 with joint pain 86.49% (32/37), low temperature 81.08%(30/37), and weak 62.16%(23/37) as the main body symptoms. Most people were infected in the summer season, accounted for 8.07%(18/223); female cases were relatively higher, accounted for 5.38% (12/223);people younger than 30 years old had the highest positive rate 24.14%(7/29);people working in the processing of animal products had the highest positive rate 6.42%(12/187). The employees gender, age, the types of work, the job seniority, the district distribution and the season were all related to the prevalence of the disease (all P< 0.05) analyzed by Chi-square test and Fisher's exact probability method. By single factor analysis, gender (male, OR =0.397, 95%CI0.178-0.884), age (31-60 years old, OR = 0.254, 95%CI0.081-0.796), and types of work (processing personnel, OR =3.211, 95%CI 1.424 - 7.238) and contacting young animal (OR = 3.544, 95%CI 1.729 - 7.264), practitioners operating tool (OR=0.231, 95%CI0.070-0.766) were related to the prevalence of the disease;by multiple factors analysis, contacting young animal (OR=5.198, 95%CI2.078-13.000) was a risk factor for brucellosis abortion, and practitioners operating tools (OR = 0.161, 95%CI 0.045 - 0.577) were brucellosis protective factors such as wearing gloves . Conclusion We suggest to strengthen health education and health promotion in professional key populations, do a good job in the epidemic monitoring and promote occupational protection awareness, and decrease the infection of brucellosis.