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目的查清宁夏北部是否存在有地方性砷中毒，其危害程度以及主要临床表现。方法根据水砷含量分布情况，对高砷地区进行流行病学调查。结果发现砷中毒病例６２８例，患病率１１．７１％，与年龄、水砷浓度成正比关系。临床表现主要为皮肤色素改变、掌跖过度角化等皮肤病变，水砷含量超标情况不严重。结论宁夏北部确存在有地方性砷中毒，但病情相对较轻
Objective To find out whether there is endemic arsenism in northern Ningxia, the degree of its harm as well as the main clinical manifestations. Methods According to the distribution of arsenic in water, the epidemiological investigation of high arsenic area was conducted. The results showed that 628 cases of arsenic poisoning, the prevalence of 11.71%, and age, water, arsenic concentration is proportional to the relationship. The main clinical manifestations of skin pigmentation, palmoplantar hyperkeratosis and other skin lesions, excessive levels of water arsenic is not serious. Conclusions There is indeed endemic arsenism in northern Ningxia, but the disease is relatively mild