A retrospective study on the seroprevalence of brucellosis in Tibet

A retrospective study on the seroprevalence of brucellosis in livestock in Tibet covering almost 4 decades and in humans for the past decade was undertaken.In the 20 th century, the prevalence of brucellosis in livestock was greatly reduced through a mass vaccination program.However, early in the 21 st century, significant differences were found in the spatial and temporal distribution of brucellosis in both livestock and humans (p<0.05).In the period from 2011 to 2013, there was a positive correlation between the seroprevalence in livestock and that of humans (r=0.93).Brucellosis was more common in livestock in the spring/summer seasons when parturition occurred.The findings from this study can be used as baseline epidemiological data for further research on brucellosis in Tibet.