Epidemiological investigation and analysis of a human brucellosis outbreak in Gulin County in 2022
Objective To investigate and analyze an outbreak of human brucellosis disease(abbreviated as brucellosis disease)in Gulin County of Sichuan Province,and to provide scientific basis for the formulation of prevention and control measures for brucellosis disease.Methods Through face-to-face epidemiological investigations and laboratory tests,the source of infection and the transmission route of the outbreak of brucellosis disease in Gulin County of Sichuan Province on April 26,2022 were analyzed.Excel 2010 software was used for data entry and collation,and SPSS 18.0 software was used for statistical analysis.The corrected Chi-square test was used for the comparison of rates.The test level was α=0.05.Results A total of 9 cases of brucellosis infection were found in this outbreak,including 8 confirmed cases and 1 latent infection case.The main clinical symptoms were muscle and joint pain.The onset time was between February 4 and May 24,2022.The median interval between the onset and diagnosis was 32 days.All cases had a history of exposure to infected sheep.Conclusions This was an outbreak of brucellosis disease caused by the importation of unquarantined sheep infected with brucellosis disease into the local area and subsequent breeding,management,slaughtering and processing under unprotected conditions.It is recommended to strengthen the market management of animal trading,circulation,breeding and slaughtering,to carry out health education for relevant practitioners to enhance their personal protection awareness,and timely to train medical staff on brucellosis disease prevention and control knowledge to enhance their epidemic prevention and diagnosis capabilities,so as to control and reduce the recurrence of brucellosis epidemics.
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