Article(id=1321169783287042474, tenantId=1146029695717560320, journalId=1319373219989389464, issueId=1321169735128043598, articleNumber=null, orderNo=null, doi=10.11847/zgggws1146518, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1732550400000, receivedDateStr=2024-11-26, revisedDate=1739721600000, revisedDateStr=2025-02-17, acceptedDate=1748534400000, acceptedDateStr=2025-05-30, onlineDate=1792921022483, onlineDateStr=2026-10-25, pubDate=1752076800000, pubDateStr=2025-07-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792921022483, onlineIssueDateStr=2026-10-25, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792921022483, creator=13701087609, updateTime=1792921022483, updator=13701087609, issue=Issue{id=1321169735128043598, tenantId=1146029695717560320, journalId=1319373219989389464, year='2025', volume='41', issue='7', pageStart='769', pageEnd='896', issueExtLink='null', onlineDate='null', pubDate='1752076800000', pubDateStr='2025-07-10', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792921011000, creator='13701087609', updateTime=1792921011000, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=797, endPage=801, ext={EN=ArticleExt(id=1321169783773581739, articleId=1321169783287042474, tenantId=1146029695717560320, journalId=1319373219989389464, language=EN, title=Effectiveness of control measures for tuberculosis cluster epidemics in schools: a dynamic modeling analysis, columnId=1321169758473539832, journalTitle=Chinese Journal of Public Health, columnName=Special Report – Infectious Disease Surveillance, runingTitle=null, highlight=null, articleAbstract=
Objective

To evaluate the effectiveness of control measures for a tuberculosis (TB) outbreak in a school setting by using a dynamic transmission model.

Methods

We developed a dynamic transmission model to simulate a TB outbreak in a school in Wuxi, Jiangsu province. We calibrated the model based on the observed progression of the outbreak and used it to compare the effectiveness of different control measures.

Results

Using actual case data, we minimized the sum of squared errors (SSE) at a transmission rate coefficient (β) of 0.129. The basic reproduction number (R0) for this outbreak was estimated to be 10.95. Without intervention, simulations projected that the outbreak would last 24 months, resulting in 35 cumulative cases and a 70% attack rate. With case isolation alone, the outbreak duration decreased to 11 months, yielding 13 cumulative cases and a 26% attack rate. Combining case isolation with preventive therapy for latent tuberculosis infection (LTBI) reduced the outbreak duration to six months, resulting in five cumulative cases and a 10% attack rate.

Conclusions

Dynamic transmission models are useful for evaluating the effectiveness of control measures during TB outbreaks in schools. Targeted preventive therapy for LTBI is highly effective in rapidly containing TB transmission in schools.

, authors=Qi ZHANG1, Minfang WANG2, Song GAO1, Huan DING1, Shipeng ZHANG1, Shiya SHEN1, Junhua LIU2, Zhuping XU1, authorsList=Qi ZHANG, Minfang WANG, Song GAO, Huan DING, Shipeng ZHANG, Shiya SHEN, Junhua LIU, Zhuping XU, authorCompany=null, correspAuthors=Zhuping XU, authorNote=null, correspAuthorsNote=
XU Zhuping, E-mail:
, copyrightStatement=Copyright © 2025 Chinese Journal of Public Health. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1321169792866832842, articleId=1321169783287042474, tenantId=1146029695717560320, journalId=1319373219989389464, language=CN, title=基于动力学模型对一起学校聚集性肺结核疫情处置措施效果分析, columnId=1321169758632923386, journalTitle=中国公共卫生, columnName=专题报道——传染病监测, runingTitle=null, highlight=null, articleAbstract=
目的

基于动力学模型,评价学校聚集性肺结核疫情处置措施效果。

方法

针对江苏省无锡市一起学校聚集性肺结核疫情,建立动力学模型,对不同处置措施下疫情发展进行拟合,评价措施控制效果。

结果

根据实际发病数拟合,当传染率系数β为0.129时,模型的误差平方和最小,本起疫情基本再生数为10.95。在无干预措施下,模型拟合疫情持续24个月,累计患者35例,累计罹患率70%。在仅病例休学隔离的处置下,疫情持续11个月,累计患者13例,累计罹患率26%。在病例休学隔离和潜伏感染者预防性治疗同时进行时,疫情持续6个月,累计患者5例,累计罹患率10%。

结论

动力学模型可用于评估学校结核病疫情处置效果,结核潜伏感染者预防性治疗是快速遏制肺结核在学校传播蔓延的有效手段。

, authors=张琪1, 王敏芳2, 高嵩1, 丁焕1, 张世鹏1, 沈诗雅1, 刘俊华2, 许祝平1, *, *, authorsList=张琪, 王敏芳, 高嵩, 丁焕, 张世鹏, 沈诗雅, 刘俊华, 许祝平, authorCompany=null, correspAuthors=许祝平, authorNote=

张琪(1991—),主管医师,硕士,研究方向:结核病防制

, correspAuthorsNote=
许祝平,E-mail:
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张琪(1991—),主管医师,硕士,研究方向:结核病防制

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张琪(1991—),主管医师,硕士,研究方向:结核病防制

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Symbols, definitions, units, values used, and sources for the six parameters adopted in the dynamic model simulation of tuberculosis transmission in a classroom setting

, figureFileSmall=null, figureFileBig=null, tableContent=
参数定义单位取值方法
β传染率系数1模型拟合
μ暴露者早期清除的比例10.25文献[7]
θ暴露者体内结核分枝杆菌清除率m−10.286文献[7]
p暴露者短期内发病的比例10.105 3本疫情数据
ω暴露者至肺结核患者的潜伏期m−10.667文献[7]
γ肺结核患者变为恢复者的速率m−10.286文献[7]
), ArticleFig(id=1321169805156143631, tenantId=1146029695717560320, journalId=1319373219989389464, articleId=1321169783287042474, language=CN, label=表1, caption=

动力学模型参数含义及取值

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参数定义单位取值方法
β传染率系数1模型拟合
μ暴露者早期清除的比例10.25文献[7]
θ暴露者体内结核分枝杆菌清除率m−10.286文献[7]
p暴露者短期内发病的比例10.105 3本疫情数据
ω暴露者至肺结核患者的潜伏期m−10.667文献[7]
γ肺结核患者变为恢复者的速率m−10.286文献[7]
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Cumulative incidence, outbreak duration, and total attack rate estimated from simulations of three intervention models: zero-intervention, case suspension and isolation, and case suspension and isolation plus preventive treatment for latent infections

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模型/Model累计发病数/例DO/月TAR/%
1352470
2131126
35610
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不同干预措施效果评价

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模型/Model累计发病数/例DO/月TAR/%
1352470
2131126
35610
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基于动力学模型对一起学校聚集性肺结核疫情处置措施效果分析
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张琪 1 , 王敏芳 2 , 高嵩 1 , 丁焕 1 , 张世鹏 1 , 沈诗雅 1 , 刘俊华 2 , 许祝平 1, *, *
中国公共卫生 | 专题报道——传染病监测 2025,41(7): 797-801
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中国公共卫生 |专题报道——传染病监测 2025 , 41 (7) : 797 -801
基于动力学模型对一起学校聚集性肺结核疫情处置措施效果分析
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张琪1, 王敏芳2, 高嵩1, 丁焕1, 张世鹏1, 沈诗雅1, 刘俊华2, 许祝平1, *, *
作者信息
  • 1无锡市疾病预防控制中心慢性传染病防制科,无锡 214023
  • 2无锡市滨湖区疾病预防控制中心,无锡 214028
通讯作者:
许祝平,E-mail:
作者简介:

张琪(1991—),主管医师,硕士,研究方向:结核病防制

Effectiveness of control measures for tuberculosis cluster epidemics in schools: a dynamic modeling analysis
Qi ZHANG1, Minfang WANG2, Song GAO1, Huan DING1, Shipeng ZHANG1, Shiya SHEN1, Junhua LIU2, Zhuping XU1
Affiliations
  • 1Department of Chronic Communicable Disease Control and Prevention, Wuxi Center for Disease Control and Prevention, Wuxi 214023, China
  • 2Binhu District Center for Disease Control and Prevention, Wuxi 214028, China
  • Corresponding Author:
    XU Zhuping, E-mail:
出版时间: 2025-07-10 doi: 10.11847/zgggws1146518
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目的

基于动力学模型,评价学校聚集性肺结核疫情处置措施效果。

方法

针对江苏省无锡市一起学校聚集性肺结核疫情,建立动力学模型,对不同处置措施下疫情发展进行拟合,评价措施控制效果。

结果

根据实际发病数拟合,当传染率系数β为0.129时,模型的误差平方和最小,本起疫情基本再生数为10.95。在无干预措施下,模型拟合疫情持续24个月,累计患者35例,累计罹患率70%。在仅病例休学隔离的处置下,疫情持续11个月,累计患者13例,累计罹患率26%。在病例休学隔离和潜伏感染者预防性治疗同时进行时,疫情持续6个月,累计患者5例,累计罹患率10%。

结论

动力学模型可用于评估学校结核病疫情处置效果,结核潜伏感染者预防性治疗是快速遏制肺结核在学校传播蔓延的有效手段。

动力学模型  /  学校  /  肺结核  /  暂集性  /  效果评估  /  无锡市
Objective

To evaluate the effectiveness of control measures for a tuberculosis (TB) outbreak in a school setting by using a dynamic transmission model.

Methods

We developed a dynamic transmission model to simulate a TB outbreak in a school in Wuxi, Jiangsu province. We calibrated the model based on the observed progression of the outbreak and used it to compare the effectiveness of different control measures.

Results

Using actual case data, we minimized the sum of squared errors (SSE) at a transmission rate coefficient (β) of 0.129. The basic reproduction number (R0) for this outbreak was estimated to be 10.95. Without intervention, simulations projected that the outbreak would last 24 months, resulting in 35 cumulative cases and a 70% attack rate. With case isolation alone, the outbreak duration decreased to 11 months, yielding 13 cumulative cases and a 26% attack rate. Combining case isolation with preventive therapy for latent tuberculosis infection (LTBI) reduced the outbreak duration to six months, resulting in five cumulative cases and a 10% attack rate.

Conclusions

Dynamic transmission models are useful for evaluating the effectiveness of control measures during TB outbreaks in schools. Targeted preventive therapy for LTBI is highly effective in rapidly containing TB transmission in schools.

dynamic model  /  school  /  tuberculosis  /  clustering  /  effectiveness evaluation  /  Wuxi city
张琪, 王敏芳, 高嵩, 丁焕, 张世鹏, 沈诗雅, 刘俊华, 许祝平. 基于动力学模型对一起学校聚集性肺结核疫情处置措施效果分析. 中国公共卫生, 2025 , 41 (7) : 797 -801 . DOI: 10.11847/zgggws1146518
Qi ZHANG, Minfang WANG, Song GAO, Huan DING, Shipeng ZHANG, Shiya SHEN, Junhua LIU, Zhuping XU. Effectiveness of control measures for tuberculosis cluster epidemics in schools: a dynamic modeling analysis[J]. Chinese Journal of Public Health, 2025 , 41 (7) : 797 -801 . DOI: 10.11847/zgggws1146518
学校结核病防控一直是我国结核病防治工作和学校卫生工作的重点,随着学校结核病防控措施的有效实施,我国学生肺结核报告发病率有所下降[1],但学校肺结核聚集性疫情或突发公共卫生事件仍时有发生[2–3],不仅影响师生身心健康,而且引发负面舆情,造成不良影响[4]。目前,学校结核病疫情处置措施有针对患者进行休学管理和建议结核潜伏感染者预防性治疗等[5]。但在单起学校结核病疫情中,受限于统计学原理和结核病潜伏期较长,因此难以开展传统流行病学控制措施效果的评价。评价传染病疫情处置措施效果是总结疫情处置经验的重要部分,通过科学的效果评价,能够发现防控措施中的成效与不足,进一步提升疫情处置水平。本研究拟采用动力学模型,通过数学方程模拟一起学校结核病聚集性疫情的发展过程,建立不同控制措施的动力学模型,模拟疫情的发展,进而评价干预措施效果。
疫情资料来源于江苏省2023年无锡市处置的一起学校肺结核聚集性疫情,首发病例于2023年4月确诊并报告,接报后无锡市滨湖区疾病预防控制中心立即按照《江苏省学校结核病防控工作规范》[6]要求进行规范流调和处置,累计确诊肺结核患者5例。密切接触者筛查和潜伏感染者预防性治疗,均按照规范要求签署知情同意书后进行。
根据肺结核的疾病自然史,将该班级人群分为易感者、暴露后的潜伏感染者、肺结核患者和移除者,构建传染病动力学模型。根据不同处置措施,分别构建无干预措施模型、仅病例休学隔离模型、病例休学隔离和潜伏感染者预防性治疗模型。
本次疫情发生在初中某一班级,因此不考虑人口流动和自然死亡情况,肺结核的传播仅考虑病例所在班级人传人情况,构建模型,见图1。
其中,S为易感者,E为暴露后的潜伏感染者,I为肺结核患者,R为移除者。微分方程如下:
$ \frac{dS}{dt}=-\beta SI+\mu \theta E $
$ \frac{dE}{dt}=\beta SI-\mu \theta E-p\omega E $
$ \frac{dI}{dt}=p\omega E-\gamma I $
$ \frac{dR}{dt}=\gamma I $
其中,$ dS/dt、dE/dt、dI/dt、dR/dt $表示$ t $时刻S、E、I、R人群变化速率,方程中涉及的参数含义见表1。
根据《江苏省学校结核病防控工作规范》[6]要求,学生被诊断为肺结核患者后,要采取休学管理,经过数月规范治疗和病情好转后方可复学。本部分动力学模型,模拟所有病例一旦确诊,均按照要求进行严格休学管理,但潜伏感染者E未进行预防性治疗,即易感者S与肺结核患者I之间的传播途径被切断,续发病例均来自潜伏感染者E,此时可将1.2.1中微分方程理解为I=0。
在本次疫情实际处置过程中,疾控严格按照《江苏省学校结核病防控工作规范》[6]要求处置,除对肺结核患者进行严格休学管理外,同时进行结核潜伏感染者预防性治疗工作。经过多轮动员,最终筛查发现的结核潜伏感染者,即重组结核杆菌融合蛋白皮肤试验筛查(ESAT-6-CFP10 skin test, EC-ST)阳性且排除肺结核患者,均进行3个月“异烟肼+利福平”方案的预防性治疗。
本研究根据2023年1—6月疫情真实发病数据,采用最小二乘法拟合β,微分方程中涉及的其他参数均参考文献[7],各参数的取值见表1。
本研究采用基本再生数评估本次学校结核病疫情的传播能力,并利用下一代矩阵法[8]推导基本再生数公式。在本次学校结核病动力学模型中,基本再生数(R0)的公式表达如下:
$ {R}_{0}=\frac{\beta p\omega {S}_{0}}{\gamma \left(\theta \mu +p\omega \right)} $
由于肺结核属慢性传染病,在学校结核病处置工作中病例发生数较少,因此本研究采用累计罹患率(total attack rate, TAR)和疫情持续时间(duration of outbreak, DO)进行评价不同控制措施效果。其中,$ \mathrm{T}\mathrm{A}\mathrm{R}=\dfrac{n}{N}\times 100\% $,$ n $为累计发病数,N为总人数;DO为首发患者发病月份至末例患者发病的时间间隔,当模型拟合月新增病例数<1时,则认为疫情流行结束。
本研究应用R 4.3.1软件“deSolve”包进行动力学模型模拟,采用“Classical 4th Order Runge-Kutta”方法求解微分方程;基本再生数的公式推导求解采用MATLAB。
此次疫情,排查同班级密切接触者共计49人,其中教师12人。在2023年4月首次密接筛查中,发现EC-ST阳性34人,其中学生32人,后续确诊学生肺结核患者3例;2023年6月,针对首次EC-ST筛查阴性的15名密接进行第2次筛查,发现EC-ST阳性者4人,均为学生,确诊学生肺结核患者1例。预防性治疗的潜伏感染者无人中断预防治疗,且无续发肺结核病例出现。疫情流行及处置过程见图2。
根据2023年1—6月实际发病数据,进行动力学模型拟合,筛选系数β。模型计算结果显示,当β=0.129时,模型拟合值与实际值的误差平方和最小为0.892,此时模型拟合效果较好决定系数为0.95,计算基本再生数R0=10.95。
在不采取任何干预措施的情况下(Model 1),经模型拟合本次学校肺结核疫情持续24个月,累计确诊肺结核患者35例,累计罹患率为70%。在仅病例休学隔离的处置措施下(Model 2),疫情将持续11个月,累计确诊肺结核患者13例,累计罹患率26%;与Model 1相比,疫情持续时间缩短13个月,累计确诊肺结核患者减少62.86%,见表2、图4。 在实际疫情处置中,病例休学隔离和潜伏感染者预防性治疗同时进行(Model 3),疫情持续时间为6个月,累计确诊肺结核患者5例,累计罹患率10%;与Model 1相比,疫情持续时间缩短18个月,累计确诊肺结核患者减少85.71%;与Model 2相比,疫情持续时间缩短5个月,累计确诊肺结核患者减少61.54%,见表2、图4。
动力学模型通过模拟传染病的传播机制,预测流行趋势,评估防控措施的效果,已经成为公共卫生领域的重要工具。目前,动力学模型在传染病疫情处置措施评估中的应用,主要集中在急性传染病[9–11],尚缺少在学校肺结核病疫情处置措施效果评估的应用。本研究以一起学校结核病聚集性疫情为例,构建无干预的动力学模型,拟合结果显示本次疫情传播率系数为0.129,模型决定系数为0.95,表明模型拟合效果较好,可用于学校结核病疫情控制措施效果评价。
通过2023年1—6月疫情数据拟合,此次学校肺结核聚集性疫情基本再生数R0=10.95,明显高于Zhang J H等人[12]根据我国2005—2012年结核病疫情数据计算出的3.33~4.30。其原因一方面是由于学校等人口聚集环境,出现病例后容易引起像肺结核等呼吸道传染病的传播[7];另一方面,与本次疫情中首发病例诊断拖延时间较长有关,张晓龙等[13]研究发现,学校肺结核指示病例就诊间隔与肺结核聚集风险之间存在线性关系,就诊间隔每延长1 d,肺结核疫情聚集性风险增加10%。通过对首发病例流行病学调查,发现该患者妹妹和母亲分别于2020、2022年确诊肺结核,而2023年1月该患者开始出现咳嗽、咳痰症状,家长未引起足够重视,误认为是普通感冒症状,直至4月患者出现胸痛症状才进行就医确诊,痰涂片结果为“4+”,就诊拖延近3个月,从而导致本次聚集性疫情的发生。
本研究通过模拟不同控制措施下疫情发展,对比累计肺结核发病数、疫情持续时间和累计罹患率,显示在当前学校结核病疫情处置要求下,针对结核潜伏感染者开展预防性治疗,能够有效控制疫情蔓延。秦林蓉等[14]对一起学校肺结核疫情病例相关人群的5年追踪随访结果研究,同样提示提高结核潜伏感染者预防性治疗率可有效降低结核发病率,其结果显示未预防性治疗组的结核发病率是完成预防性治疗组的6.43倍。但在实际学校结核病疫情处置工作中,感染结核分枝杆菌的密切接触者预防性治疗接受率较低,其主要原因与学生、家长及医务人员对结核潜伏感染者预防性治疗认知程度有关。张晓萌等[15]对天津9所学校在校生进行学校结核病认知调查显示,在疾病认知、诊疗认知、防控认知和预防性治疗4个维度中,预防性认知的得分和知晓率均最低,提示学校要加强日常结核病防控多维度的健康教育。同时,医务人员也要对学校结核病疫情中预防性治疗工作提高认识,研究表明医务人员对结核潜伏感染预防性治疗的态度直接影响感染者接受治疗的意愿[16]。此外,王展等[17]研究表明预防性治疗费用问题同样影响学生群体预防性治疗接受意愿,因此教育行政部门应当设立专项资金用于学校结核病疫情处置,以提高预防性治疗率。
受限于动力学模型原理,此研究仍存有一定局限,本模型是简化的理想模型,实际肺结核传播过程远比本模型要复杂,患者咳嗽频次、活动范围,易感人群免疫状态、接触频次,教室内开窗通风、环境消毒频次等均未纳入模型,因此更细致的动力学模型有待进一步研究。
综上所述,动力学模型可用于学校结核病疫情处置效果评估,开展结核潜伏感染者预防性治疗,能够有效且快速遏制肺结核在学校中的传播蔓延。

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2025年第41卷第7期
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doi: 10.11847/zgggws1146518
  • 接收时间:2024-11-26
  • 首发时间:2026-10-25
  • 出版时间:2025-07-10
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  • 收稿日期:2024-11-26
  • 修回日期:2025-02-17
  • 录用日期:2025-05-30
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    1无锡市疾病预防控制中心慢性传染病防制科,无锡 214023
    2无锡市滨湖区疾病预防控制中心,无锡 214028

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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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