摘要肉毒毒素是由肉毒杆菌产生的一类烈性蛋白毒素，直接作用于脑神经核和外周神经肌肉接头，阻碍乙酰胆碱的释放，从而影响神经冲动传导，导致肌肉麻痹，中毒时轻者表现为眼肌受累，重者可出现吞咽困难、全身瘫痪、呼吸抑制症状，甚至导致死亡。该文报道了1例应用非正规渠道获得的A型肉毒毒素后出现重度中毒症状的患者，在症状出现后第13天使用抗毒素治疗，取得明显效果。

abstractsBotulinum toxin is a potent protein toxin produced by Clostridium botulinum. It acts directly on the brain nerve nucleus and peripheral neuromuscular junction, blocking the release of acetylcholine and thereby affecting nerve impulse transmission, ultimately leading to muscle paralysis. Mild cases may present with ocular muscle involvement, whereas severe cases may involve dysphagia, general paralysis, respiratory depression, and even death. This article reports on a patient who experienced severe poisoning symptoms after using type A botulinum toxin obtained through informal channels. The patient was treated with antitoxin on the 13th day after symptoms onset and achieved a significant improvement in their condition.