Objective To investigate the children's body environmental Se and T-2 toxin level in their staple food in Kaschin-Beck disease(KBD)relative active regions in Aba state of Sichuan province in 2008.Methods We took X-ray photograph of the right hand on children aged 7-13 years in 48 villages from 11 counties in Aba state.The relative active regions of KBD were chosen according to the X-ray result and historical status of KBD.The children's urine and hair,drinking water and their staple food werr sampled.Selenium contents in urine,hair,water and food samples were determined by naphthalene fluorescence,and T-2 toxin in staple food samples were detected by ELISA kits.Results In 2145 X-ray films,66 films were positive,and the children's KBD positive rate was 3.08%(66/2145).The KBD positive rate was respectively 10.98%(29/264)and 8.52%(19/223)in Maerkang county,Jinchuan county and it was 0.75%(3/400)in Rangtang county,historically serious endemic area.The selenium content in urine of children aged 7-13 years in Maerkang county,Jinchuan county and Rangtang county was (10.41±4.67), (10.11±3.65), (8.42±2.68)μg/g Cr, respectively, there was no statistical difference among three counties(F=0.901, P>0.05). The selenium content in hair of children aged 7-13 years in Maerkang county[(0.18±0.04)mg/kg] was lower than that in Jinchuan county[(0.21±0.04)mg/kg, P<0.05].The selenium content in water in Jinchuan county [(0.225±0.124 )μg/L ] was lower than that in Maerkang county and Rangtang county[(0.320±0.092), (0.339±0.105)μg/L, all P<0.05]. The selenium content in staple food in Jinchuan county(0.0033 mg/kg) was lower than that in Maerkang county and Rangtang county(0.0258,0.0137mg/kg, Z=-6.146,-3.042, all P<0.017). The T-2 toxin level in flour in three counties was 19.60,17.95,26.25 ng/g,respectively,there was no statistical difference among three counties(X2=5.623, P>0.05).The T-2 toxin level in grain Maerkang county (10.72 ng/g) was higher than that in Jinchuan county and Rangtang county (3.74,3.30 ng/g, Z=-6.315,-4.407,all P<0.017). T-2 toxin contamination in flour was more severe than that in grain (Z=-6.690,-5.493,-3.676, all P<0.05). Conclusions In 3 relative active KBD regions of Aba state,the children's selenium nutritional status and the T-2 toxin contamination level in their staple food is consistent with the distribution of KBD.%目的 调查2008年四川省阿坝州大骨节病相对活跃病区儿童内、外环境含硒量及主食粮T-2毒素污染水平.方法 对阿坝州11个县48个监测点进行7～13岁儿童右手X线拍片,根据X线检出结果以及历史病情选择大骨节病相对活跃病区作为调查现场.对大骨节病相对活跃病区中7～13岁儿童进行调查采样,测定尿硒、发硒、水硒、粮硒及主食粮中T-2毒素水平.结果 共拍X线片2145张,其中阳性66张,儿童大骨节病X线检出率为3.08%(66/2145).选择马尔康县、金川县[X线检出率分别为10.98%(29/264)、8.52%(19/223)]和壤塘县[历史重病区,X线检出率为0.75%(3/400)]3个大骨节病相对活跃病区为调查现场.3个县7～13岁儿童尿硒水平[(10.41±4.67)、(10.11±3.65)、(8.42±2.68)μg/g Cr]比较,差异无统计学意义(F=0.901,P>0.05).马尔康县儿童发硒[(0.18±0.04)mg/kg]低于金川县[(0.21±0.04)mg/kg,P<0.05],金川县水硒[(0.225±0.124)μg/L}低于马尔康县和壤塘县[(0.320±0.092)、(0.339±0.105)μg/L,P均<0.05],金川县粮硒(0.0033 mg/kg)低于马尔康县和壤塘县(0.0258、0.0137 mg/kg,Z值分别为-6.146、-3.042,P均<0.017).3个县粮食粉末中T-2毒素水平(19.60、17.95、26.25 ng/g)比较,差异无统计学意义(X2=5.623,P>0.05):马尔康县粮食颗粒中T-2毒素水平(10.72 ng/g)高于金川县和壤塘县(3.74、3.30 ng/g,Z值分别为-6.315、-4.407,P均<0.017);粮食粉末中T-2毒素水平均高于粮食颗粒(Z值分别为-6.690、-5.493、-3.676.P均<0.05).结论 阿坝州3个大骨节病相对活跃病区7～13岁儿童内、外环境硒营养状态以及家庭主食粮T-2毒素水平与当地大骨节病病情分布基本一致.
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