2011-2012年江苏省高砷地区饮水型地方性砷中毒监测结果

Analysis of surveillance results on water-born endemic arsenism in high arsenic area of Jiangsu Province from 2011 to 2012

目的了解江苏省高砷地区饮水型砷中毒的病情现状,为进一步制定防治策略提供依据。方法 2011-2012年监测高砷地区改水工程进度,并在所有改水工程中随机选择11个监测其运行情况;从高砷区中选择2个自然村作为监测点,对连续居住半年以上的居民按照地方性砷中毒诊断标准(WS/T211-2001)进行砷中毒病情调查,同时采集监测点水样,测定饮水含砷量。结果 2011年完成改水工程11个,改水率29.73%,累计完成改水工程29个,累计改水率78.37%;2012年完成改水工程8个,改水率21.62%,累计完成改水工程37个,累计改水率100.00%。2011年11个改水工程均正常运转,其中10个水砷含量合格,合格率为90.91%。2012年11个改水工程均正常运转,水砷含量全部合格。2011年共调查307人,砷中毒9例,检出率为2.93%,均为轻度病例,可疑病例7例(占2.28%);2012年共调查353人,无中毒病例,可疑病例10例(占2.83%)。两年均未发现皮肤癌病例。结论江苏省高砷地区的改水工作基本完成,改水工程正常运转,可疑病人检出率稍有升高,需尽快采取相关措施。

Objective To investigate current status of water-born endemic arsenism in Jiangsu Province; to provide scientific evi- dence for making prevention and control strategies. Methods Progress of water improvement programs from 2011 to 2012 were super- vised. A total of 11 water improvement programs were selected randomly for performance surveillance; 2 villages in high arsenic area were selected as monitoring sites, the disease condition of residents who lived for more than six continuous months in high arsenic areas were investigated for arsenism according to Endemic Arsenism Diagonstic Criteria （WS/T211-2001 ） ; meanwhile, arsenic level of water samples from monitoring sites were analyzed. Results In 2011, 11 water improvement programs were eompleted ,resulting water improvement rate of 29.73% ; among all programs, 29 were completed, resulting overall water improvement rate of 78.37%. In 2012,8 water improvement programs were completed , resulting water improvement rate of 21.62%;among all programs, 37 were completed, resulting overall water improvement rate of 100.00%. Eleven completed water facilities were running normally in 2011, of which 10 were qualified for arsenic concentration, resulting qualification rate of 90.91%. Eleven completed water facilities were running normally in 2012, all were qualified for arsenic concentration, resulting qualification rate of 100.00%. A total of 307 residents were investigated in 2011, among which 9 were diagnosed with arsenism ,resulting prevalence rate of 2.93 %, who were all mild patients; 7 were identified as suspicious patients （accounting for 2.28 %）. A total of 353 residents were investigated in 2012, none were diagnosed with arsenism and 10 were identified as suspicious patients （accounting for 2.83%）. No cutaneum carcinoma cases were identified. Conclusion The water improvement programs in high arsenic area of Jiangsu Province have been almost completed. All improved water facilities were running normally. Suspicious patients rates were relatively high, which required implementation of targeted strategies as quick as possible.