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Effect of lead exposure on the immune function of lymphocytes and erythrocytes in preschool children 总被引:1,自引:0,他引:1
Objective: To investigate the influence of lead exposure on the immune function of lymphocytes and erythrocytes in preschool children. Materials and methods: A group of 217 children three to six years of age from a rural area were given a thorough physical examination and the concentration of lead in blood samples taken from each subject was determined. The indices of lymphocyte immunity (CD^ 3CD^ 4, CD^ 3CD^ 8, CD^ 4CD^ 8, CDˉ3CD^ 19) and erythrocyte immunity (RBC-C3b, RBC-IC, RFER, RFIR, CD35 and its average fluorescence intensity) of 40 children with blood lead levels above 0.483 μmol/L were measured and compared with a control group. Results: The blood lead levels of the 217 children ranged from 0.11 μmol/L to 2.11 μmol/L. The CD^ 3CD^ 4and CD^ 4CD^ 8 cells were lower (P<0.01) and the CD^ 3CD^ 8 cells were higher in the lead-poisoned subjects than those in the control group (P<0.05). CD^ 3 and CDˉ3CD^ 19 did not show significant differences. Although the RBC-C3b rosette forming rate was lower and the RBC-IC rosette forming rate was higher in the lead-poisoned group, this difference could not be shown to be statistically significant (P>0.05). RFIR was found to be lower in the lead-poisoned group (P<0.01). Compared with the control group, the positive rate of CD35 was not found to be significantly different in a group of 25 lead-poisoned children (P>0.05), while the average fluorescence intensity was lower in the lead-poisoned group (P<0.05). Conclusion: Lead exposure can result in impaired immune function oft lymphocytes and erythrocytes in preschool children. 相似文献
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目的:通过对学龄前儿童眼外伤的分析,提出有效的预防措施.方法:对2012年1月至2014年4月间收治的27例学龄前儿童眼外伤发生的年龄、性别、事故地点、事故原因、受伤性质、预后进行回顾性分析.结果:儿童眼外伤男童多于女童,受伤地点家中多见,并随年龄增加发病率逐渐增加,5岁起达到发病高峰,预后与受伤评分有关.结论:加强儿童眼外伤的预防宣传,可降低儿童眼外伤发生的风险,以有效减少和控制低视力儿童. 相似文献
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学龄前儿童龋病影响因素的研究进展 总被引:2,自引:0,他引:2
对学龄前儿童龋病的众多可疑因素进行总结和筛选,找到主要的相关因素,为降低学龄前儿童龋病的发生提供依据。结果发现,儿童气质、喂养方式、家庭环境、社会行为4个因素与学龄前儿童龋齿的患病相关。 相似文献
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基于心理学理论的学龄前儿童玩具的艺术创新设计 总被引:1,自引:0,他引:1
学龄前儿童玩具的开发对人类智慧的形成起着重要作用.通过心理学原理对设计作出评估,旨在找出设计中的问题,明确改进方向.学龄前儿童玩具的开发应注重各阶段年龄特征、安全性及民族化风格. 相似文献
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学龄前期的孩子独立活动范围渐渐变大,接触事物的机会增多,智力发展快,求知欲及可塑性强,易发生意外事故。在这个非常时期,做好其家庭保健与安全防范,对孩子的将来乃至一生都有着深远的影响。 相似文献
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全面发展不易哈佛大学教授博通·怀特在哈佛幼儿园主持的长达13年的项目也许可以给我们一个答案。为了研究早期培训能否让儿童变得更聪明,拥有更成功的未来,他选择了在幼儿园里发展特别优异的儿童作为研究对象。因为他们关心的是儿童的平衡发展,所以没有研究那些在智力或者艺术上表现特别出色,但在人际交往方面有困难等其他方面特别差的孩子。 相似文献
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目的了解老区城市家庭经济较好儿童营养不良的分布状况,为今后进一步探讨干预措施提供依据。方法分别计算儿童身高、体重的Z评分,按WHO推荐标准进行评价。结果本研究儿童营养不良发生率较低,近期营养状况较好,生长迟缓率为8.5%。结论生长迟缓问题应成为今后家庭经济较好儿童的重点监测及解决的目标。 相似文献