目的分析中国水痘流行病学特征。方法通过中国疾病预防控制信息系统收集中国2016-2019年水痘病例和突发公共卫生事件(Public health emergency event,PHEE),进行描述性流行病学分析。结果2016-2019年中国共报告水痘3047715例,年均报告...目的分析中国水痘流行病学特征。方法通过中国疾病预防控制信息系统收集中国2016-2019年水痘病例和突发公共卫生事件(Public health emergency event,PHEE),进行描述性流行病学分析。结果2016-2019年中国共报告水痘3047715例,年均报告发病率为55.05/10万;发病率从2016年的35.50/10万上升到2019年的70.14/10万;各省份年均发病率在19.66/10万(黑龙江省)-117.17/10万(江苏省)之间;每年5-7月和10月-次年1月为发病高峰;0-4岁、5-9岁、10-14岁、15-19岁、≥20岁年均发病率(/10万)分别为61.77、308.14、228.31、97.69、12.43。共报告水痘PHEE4183起,其中发生在幼儿园、小学、中学分别占12.93%、68.40%、14.61%。结论中国2016-2019年水痘报告发病率呈逐年增高趋势,儿童和学生为高风险人群;建议提高适龄儿童2剂次水痘疫苗接种率,加强水痘监测。展开更多
Potted seadlings of Pinus koraiensis , Fraxinus mandshurica,Juglans mandshurica,Tilia amurensis, and Quercus mongolica ,which are five dominant species in the Korean pine broadleaf forest at Changbai mountain,were gro...Potted seadlings of Pinus koraiensis , Fraxinus mandshurica,Juglans mandshurica,Tilia amurensis, and Quercus mongolica ,which are five dominant species in the Korean pine broadleaf forest at Changbai mountain,were grown in different soil moistures.We designed three soil moisture scenarios:85%～100%(high water,CK),65%～85% (medium water,MW) and 45%～65% (low water,LW) of field water holding capacity.The results show that characteristics of typical drought resistance on the leaves are significantly developed.The net photosynthetic rate and water use efficiency of F. mandshurica were higher compared with CK at MW.The net photosynthetic rate and water use efficiency of other 4 tree species at CK were lower than those at MW and LW.The transpiration rate of 5 tree species responses differently to various soil water status.展开更多
文摘目的分析中国水痘流行病学特征。方法通过中国疾病预防控制信息系统收集中国2016-2019年水痘病例和突发公共卫生事件(Public health emergency event,PHEE),进行描述性流行病学分析。结果2016-2019年中国共报告水痘3047715例,年均报告发病率为55.05/10万;发病率从2016年的35.50/10万上升到2019年的70.14/10万;各省份年均发病率在19.66/10万(黑龙江省)-117.17/10万(江苏省)之间;每年5-7月和10月-次年1月为发病高峰;0-4岁、5-9岁、10-14岁、15-19岁、≥20岁年均发病率(/10万)分别为61.77、308.14、228.31、97.69、12.43。共报告水痘PHEE4183起,其中发生在幼儿园、小学、中学分别占12.93%、68.40%、14.61%。结论中国2016-2019年水痘报告发病率呈逐年增高趋势,儿童和学生为高风险人群;建议提高适龄儿童2剂次水痘疫苗接种率,加强水痘监测。
文摘Potted seadlings of Pinus koraiensis , Fraxinus mandshurica,Juglans mandshurica,Tilia amurensis, and Quercus mongolica ,which are five dominant species in the Korean pine broadleaf forest at Changbai mountain,were grown in different soil moistures.We designed three soil moisture scenarios:85%～100%(high water,CK),65%～85% (medium water,MW) and 45%～65% (low water,LW) of field water holding capacity.The results show that characteristics of typical drought resistance on the leaves are significantly developed.The net photosynthetic rate and water use efficiency of F. mandshurica were higher compared with CK at MW.The net photosynthetic rate and water use efficiency of other 4 tree species at CK were lower than those at MW and LW.The transpiration rate of 5 tree species responses differently to various soil water status.
