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目的了解人为投毒引起的亚硝酸盐食物中毒的特点和基本的现场流行病学调查方法。方法现场流行病学调查和盐酸萘乙二胺法及进口试纸条法检测样品中的亚硝酸盐。结果经确诊,累计报告29名患者,临床症状主要以缺氧和紫绀为主,其中6名患者的高铁血红蛋白比例(FmetHb%)超过10%。所有患者发病前三天只有一个共同餐次,平均潜伏期34min,潜伏期短,发病急促,且分别进食不同的食物而发病,在6份患者的呕吐物、4份剩余食物和2份鸡味粉中检出亚硝酸盐的含量严重超标。结论此次食物中毒为人为投放大量亚硝酸盐引起,具有隐蔽性强、临床症状重和现场取证难等特点。
Objective To understand the characteristics of nitrite food poisoning caused by human poisoning and the basic on-site epidemiological investigation methods. Methods In situ epidemiological investigation and naphthyl ethylenediamine hydrochloride method and imported test strips were used to test nitrite in samples. Results A total of 29 patients were diagnosed. The main clinical symptoms were hypoxia and cyanosis. Among them, six patients had a methemoglobin ratio (FmetHb%) of over 10%. All patients had only one common meal three days before onset, with an average incubation period of 34 min. The incubation period was short and the onset was rapid. The incidence of the disease varied among 6 patients with vomit, 4 remaining foods and 2 chicken flavors Detection of nitrite levels seriously exceeded. Conclusion The food poisoning caused by man-made nitrite caused a large, concealed strong, clinical symptoms and evidence of on-site difficult to wait for the characteristics.