Epidemic situation and control methods of human brucellosis in Three Rivers Fountainhead of Qinghai Province / 中华地方病学杂志

ABSTRACT

Objective To know the prevalence of brucellosis in Three Rivers Fountainhead of Qinghai Province,to analyze the influencing factors of human brucellosis and to provide reference for effective control of brucellosis epidemic.Methods The epidemiological data of human brucellosis in Three Rivers Fountainhead of Qinghai Province from 2012 to 2014 were collected from Qinghai Institute for Endemic Disease Prevention and Control.The distribution of time,area,population and the behavioral factors of the infected population were analyzed.Results A total of 6 310 people were surveyed,the infection rate was 2.23％ (141/6 310),the prevalence rate was 0.63％ (40/6 310),and the number of new cases was 40.Prevalence in Nangqian County was the highest [2.00％ (12/601)].From January to April,most cases were found,which accounting for 50.00％ (20/40).The main occupation of the patients was herdsmen,accounting for 87.50％ (35/40).The difference of constituent ratio of different nationalities in infected population was statistically significant (x2 =13.32,P ＜ 0.05).The dominant strain of brucellosis was Brucella ovis.The results of behavioral factors survey showed that the risk factors were epidemiological contact history,eating undercooked meat,no harmless treatment of diseased livestock products,no self-protection measures when contacting diseased livestock,frequent consumption of raw milk,direct unarmed contact with diseased livestock and their products,and lived in the same room with lambs (OR =21.530,3.337,6.227,1.760,3.874,4.602,3.753,P ＜ 0.05).Conclusions Brucellosis is common in winter and spring in Three Rivers Fountainhead of Qinghai Province,mainly among herdsmen and in local areas.Brucellosis in Three Rivers Fountainhead is related to many behavioral factors.