Abstract:

Objective To understand the current situation of brucellosis infection and feeding and breeding of breeding livestock's families in Western pastoral areas of Jilin Province, to analyze the influence factors of brucellosis infection, and to provide evidence for human brucellosis controlling and spreading in breeding livestock's families. Methods Two countries were randomly selected in Qianguo county which was one of the most popular areas of brucellosis infection in Jilin Province.In each township, almost half of the villages were selected and all householders of the sheep farmers in those villages were respondents.Face to face interview was performed to collect the information on brucellosis infection.Three parts were included in the questionnaire, such as the general status of the family, breeding characteristics (breeding age, species, scale, source, stocking way, and so on.) and status of brucellosis infection.Based on the principle of informed consent, 5 mL venous blood samples of all family members of the respondents were collected, brucellosis was confirmed with serum agglutination test(SAT).The breeding characteristics of sheep farmers' families, the current situation of brucellosis infection and its related factors were analyzed. Results Out of 149 qualified papers collected, there were 84 families in which some members were infected with brucellosis, with the prevalence of brucellosis of 55.03%.Whether the new-bought sheep were all quarantined or not and the time of breeding sheep were the independent risk factors that influenced brucellosis.The risk of infecting brucellosis in the family members who breed for 10 years or more than 10 years and less 15 years was 3.978 times more dangerous than others who breed for less than one year(OR=3.978, 95%CI: 0.005-15.746), and the risk of infecting brucellosis in the family members who breed for 20 years or more than 20 years was 10.531 times more dangerous than others who breed for less than one year(OR=10.531, 95%CI:2.363-46.940).The risk of infecting brucellosis in the families in which all the new-bought sheep were quarantined was 2.848 times higher than that of infecting brucellosis in the families in which not all the new-bought sheep were quarantined(OR=2.848, 95%CI: 1.289-6.295).There was no statistical significance between brucellosis infection and breeding years, scale, and breed. Conclusion The prevalence of brucellosis infection from breeding livestock's families is higher than that from others, high-risk behaviors like non-quarantine, non-immunization and mixed-graze etc.still exist.Brucellosis infection is serious and the understanding about brucellosis prevention is insufficient among breeding livestock's families.It is necessary to strengthen further propaganda about brucellosis infection from breeding livestock's families.

Key words: brucella, sheep, brucellosis/epidemiology, influence factors