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目的分析2011年景德镇地区重症手足口病患儿标本肠道病毒71型(EV71)分离株2011JDZ35全基因组序列特征。方法采集重症手足口病患儿咽拭子标本,进行病毒分离和逆转录-聚合酶链反应(RT-PCR)扩增分离病毒的全基因组序列,并进行全基因组核苷酸序列测定,参考EV71 A、B、C各基因型的参考毒株和国内外分离毒株进行同源性分析并构建系统发生树。结果 2011JDZ35株的基因组长度为7406 bp,其中包括5’端非编码区(5’UTR)长742 bp,病毒基因组编码区(ORF)全长6582 bp及3’端非编码区(3’UTR)长82 bp。ORF编码含2193个氨基酸残基的多聚蛋白。2011JDZ35株基因组的结构与FY08-C30-P14、EV71/Ningbo.CHN/065/2010、HZ08/Hang-zhou/2008十分接近,整个基因组的核苷酸同源性分别为97.3%,97.3%,97.7%;氨基酸同源性为99.1%,99.2%,99.2%。均属于C4亚型,而与Cox.A16国际标准株G10(U05876)及EV71国际标准株BrCr(U22521)差异较大,核苷酸同源性分别仅为77.5%,80.0%;氨基酸同源性为89.8%,94.8%。结论 EV71型病毒2011JDZ35株全基因组的组成和结构符合肠道病毒特征,与其他EV71型病毒具有相同的基因组结构,2011JDZ35株与中国大陆浙江宁波株亲缘关系最近,与阜阳株和杭州株等中国大陆内陆地区分离株较近,而与马来西亚、我国台湾、厦门分离株的差异较为明显,与国际标准株则有较大差异;2011JDZ35株与浙江宁波株具有共同的进化途径,推断2011JDZ35株与浙江宁波株可能共同来源于2008年中国大陆地区流行的EV71病毒株同一种系。 相似文献
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景德镇瓷厂工人死因分析 总被引:1,自引:0,他引:1
目的 探索危害陶瓷工人健康的主要疾患及职业有害因素对工人寿命的影响.方法 采用流行病学队列研究方法,对景德镇3个瓷厂1972年到1974年在册且工作一年以上所有陶瓷工人建立队列,随访至2003年底.队列中对死者均查询死因,陶工尘肺由当地疾病控制中心诊断小组确诊,肺癌均收集医院诊断病例.以全国城市居民年龄别死亡率为参照计算标化死亡比(SMR).结果 队列成员共4957名,随访至2003年底,共计130 783.6人年,死亡1636人,死亡率为1250.9/10万,累计死亡率为33.1%.影响陶瓷工人寿命的主要疾病按累计死亡率从高到低排序分别是:恶性肿瘤、心血管疾病、呼吸系统疾病、传染性疾病.与全国平均水平比较,陶瓷工人全死因死亡率基本持平,标化死亡比为1.01,死亡率明显升高的疾病有呼吸系统疾病(SMR=1.30)、陶工尘肺(SMR=36.35)、传染性疾病(SMR=5.08)和肺结核(SMR=4.06).陶瓷粉尘对工人寿命的影响十分明显,接尘工人多种疾病的死亡率均高于非接尘组,除陶工尘肺外,接尘组肺癌(RR=1.9,95%CI:1.2~3.1)、呼吸系统疾病(RR=2.4,95%CI:1.8~3.2)、肺结核(RR=1.6,95%CI:1.2~2.1)明显高于非接尘组,差异有统计学意义.研究还发现全死因、肠癌、肺癌、呼吸系统疾病、肺结核危险度均随接尘严重程度而明显增加,呈现接触一反应关系.结论 陶瓷行业主要职业危害为粉尘,卫生工作重点应是控尘和预防肺结核. 相似文献
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瓷厂陶工尘肺发病规律探讨及影响因素分析 总被引:1,自引:1,他引:0
目的 分析景德镇瓷厂陶工尘肺的发病规律,探讨陶工尘肺发病的影响因素,以指导今后的陶工尘肺防治工作.方法 采用队列研究方法对景德镇3个瓷厂1960年1月1日至1974年12月31日在册且工作>1 a的所有职工建立队列进行随访调查至2003年12月31日,队列人员中陶工尘肺诊断由景德镇疾病预防控制中心诊断组确诊,同时收集瓷厂历年粉尘监测资料.结果 队列人群4968例,共有接尘工人2992例.累计诊断0 期陶工尘肺757例、陶工尘肺587例,接尘工人陶工尘肺发病率为0.5%.陶工尘肺患者开始接尘年份以1950~1960年最多,发病年龄集中在40~60岁,平均潜伏期为(31.7±7.7)a,平均晋级年限分别为0 期晋Ⅰ期为7.5 a,Ⅰ期晋Ⅱ期为4.4 a,Ⅱ期晋Ⅲ期为6.9 a.陶工尘肺累积危险度与累积粉尘接触量之间有明显的接触剂量-反应关系,除累积粉尘接触量外,影响陶工尘肺发病的因素包括是否合并结核(RR=20.9,P<0.01),吸烟量(RR=1.3,P<0.05),开始接尘年份(RR=1.5,P<0.01)和性别(RR=2.0,P<0.01).结论 累积总粉尘接触量与陶工尘肺之间存在明显的剂量反应关系,合并结核,吸烟量,开始接尘年份和性别是影响陶工尘肺发病的危险因素.与其他行业的粉尘危害比较,陶工尘肺呈现潜伏期长,0 期陶工尘肺比例大,晋级快的特点. 相似文献
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To investigate the health impacts of crystalline silica mixed dust and other potential occupational hazards on workers in ceramic factories, a cohort study of 4851 workers registered in the employment records in 3 ceramic factories in Jingdezhen city of China between 1972 and 1974 was identified. The cohort mortality was traced throughout 2003 with an accumulation of 128970.2 person-years, revealed 1542 deaths. Standardized mortality ratios (SMRs) were calculated for the main causes of death by using Chinese national mortality rates as reference. The mortality from all causes in three ceramic factories was 12.0‰ and the cumulative mortality was 31.8%. Malignant neoplasm, cardiovascular diseases, respiratory diseases, infectious diseases were the first four illnesses that threaten workers’ life, and they accounted for 73.2% of all deaths. The results of this study showed that the standardized mortality ratio for all subjects was 1.02, which is very close to that expected on the basis of the China national mortality rates. Statistically significant mortality excesses for respiratory disease (SMR=1.36), pneumoconiosis (SMR=37.34), infectious disease (SMR=5.70) and pul- monary tuberculosis (SMR=3.88) were observed. The mortality of 2938 dust-exposed workers was higher than that of 1913 non dust-exposed workers. Except for pneumoconiosis, the mortality from lung cancer, non-malignant respiratory diseases and pulmonary tuberculosis in dust-exposed workers were significantly increased as compared with that in non-exposed workers, and the relative risks (RRs) were 1.86 (1.16–2.99), 2.50 (1.84–3.40), 1.81 (1.34–2.45). The exposure-response relationships between cumulative dust exposure level and mortality from all causes, colorectal cancer, lung cancer, respiratory diseases, and pulmonary tuberculosis were also identified. The findings indicated that silica mixed dust in ceramic factories has harmful impact on the workers’ health and life span in ceramic factory. 相似文献
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