An Outbreak Investigation on Chicken Coccidiosis in a Farm
In May 2022,a large number of local chickens suddenly died of unknown causes in a farm in Weihai City,Shandong Province. In order to investigate the epidemic situation,find out all possible causes and then control the outbreak,an emergency epidemiological investigation was carried out in the farm. The outbreak was confirmed as an infection with chicken coccidiosis according to the clinical symptoms,epidemiological investigation information and laboratory test results. The outbreak was rapidly controlled through administration with compound sulfadoxine-chloropyridazine sodium together with vitamin C and thorough disinfection for the breeding environment. It was investigated that the outbreak was mainly caused by the pathogens introduced along with imported chickens without quarantine. Therefore,the farm was recommended to strengthen quarantine and isolation breeding when introducing chickens,regularly deworm chickens and promptly clean chicken coops and feces to prevent any possible re-occurrence of chicken coccidiosis.