2021年10月25日，四川省宣漢縣某肉牛場發(fā)生肉牛猝死事件,。為了解事件狀況和發(fā)生原因,，并盡可能采取措施減少養(yǎng)殖場的經(jīng)濟損失，赴現(xiàn)場開展了流行病學調(diào)查,。調(diào)查發(fā)現(xiàn),，該牛場3天內(nèi)共死亡22頭牛，累積死亡率為46.8%（22/47）,。綜合流行病學調(diào)查信息,、病牛臨床癥狀、剖檢變化,，初步推測肉牛猝死的原因是飼喂霉變飼料導致黃曲霉等毒素中毒,。通過暫停飼喂原飼料，增加飲水量,，更換飼草飼料并添加蒙脫石脫霉劑,，肉牛發(fā)病情況得到有效控制。該起肉牛猝死事件提示,，養(yǎng)殖場人員應加強飼養(yǎng)管理和疫病防控知識的學習,，增強責任心，提高飼養(yǎng)管理能力,。

An Emergency Epidemiological Investigation on a Poisoning Event with Aflatoxin and Other Toxins in Beef Cattle

On October 25,，2021，some beef cattle suddenly died in a farm in Xuanhan County,，Sichuan Province. In order to investigate the event and find out all the causes leading to the death,，and to take measures to reduce economic loss of the farm as far as possible，an epidemiological investigation was carried out on the farm. It was investigated that a total of 22 cattle died within three days,，with a cumulative mortality rate of 46.8%（22/47）. It was preliminarily speculated that,，based on the information of movement，clinical symptoms and changes under autopsy，the cattle died of aflatoxin poisoning due to feeding with moldy feed. The disease was effectively controlled after stopping feeding the previous feed,，increasing the amount of drinking water,，changing forage and adding montmorillonite. It was suggested that the farm staff should learn the knowledge about breeding management and disease prevention and control，strengthen their sense of responsibility and improve their ability for feeding and management.

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