Article(id=1324071008730227700, tenantId=1146029695717560320, journalId=1227665162245664772, issueId=1324070892967428793, articleNumber=null, orderNo=null, doi=10.20043/j.cnki.MPM.202506422, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1750780800000, receivedDateStr=2025-06-25, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793612728530, onlineDateStr=2026-11-02, pubDate=1766592000000, pubDateStr=2025-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793612728530, onlineIssueDateStr=2026-11-02, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793612728530, creator=13701087609, updateTime=1793612728530, updator=13701087609, issue=Issue{id=1324070892967428793, tenantId=1146029695717560320, journalId=1227665162245664772, year='2025', volume='52', issue='24', pageStart='4417', pageEnd='4608', issueExtLink='null', onlineDate='null', pubDate='1766592000000', pubDateStr='2025-12-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1793612700931, creator='13701087609', updateTime=1793612772549, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1324071193430602023, tenantId=1146029695717560320, journalId=1227665162245664772, issueId=1324070892967428793, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1324071193430602024, tenantId=1146029695717560320, journalId=1227665162245664772, issueId=1324070892967428793, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=4577, endPage=4583, ext={EN=ArticleExt(id=1324071009279681525, articleId=1324071008730227700, tenantId=1146029695717560320, journalId=1227665162245664772, language=EN, title=Epidemiological characteristics and influencing factors of recurrent cases of hand-foot-and-mouth disease reinfection, Haikou City, 2008-2024, columnId=1228016573156360233, journalTitle=Modern Preventive Medicine, columnName=Disease Control and Prevention, runingTitle=null, highlight=null, articleAbstract=
Objective

To analyze the epidemiological characteristics and influencing factors of repeated infections of hand-foot-and-mouth disease in Haikou City (2008-2024), and to provide reference for formulating prevention and control strategies.

Methods

Collect data through the national notifiable disease report system, Use descriptive statistics, logistic regression, and other methods for data analysis.

Results

The recurrence rate of hand-foot-and-mouth disease in Haikou City (2008—2024) was 6.41%, and showed a fluctuating downward trend from 2016 onwards. The repeated infection epidemic season is from April to July and from September to November. The repeated infection rate in males (6.90%) is higher than that in females (5.62%). 95.18% of repeat infection patients are children aged 3 years and below, with repeat infection rates of 9.59%, 8.17%, 6.22%, and 4.95% in the age groups of <1、1-<2、2-<3 and 3-<4 years, respectively. The repeated infection rate among scattered children (7.32%) is higher than that of preschool children (4.14%) and students (0.96%). The repeated infection rate in rural areas (7.29%) is higher than that in urban areas (6.33%) and townships (5.50%). The median interval between repeated infections is 385 days, with 76.75% occurring within 2 years. The repeat infection rate of patients with severe symptoms (9.36%) is higher than that of patients with mild symptoms (6.39%). Male, 3 years old and under, scattered children and preschool children (compared with students), rural and urban areas (compared with towns), low incidence years, and severe first-time infections are risk factors for recurrent infections.

Conclusion

The repeated infection rate of hand-foot-and-mouth disease in Haikou City is showing a downward trend, but it is still necessary to continue to strengthen health education, pathogen monitoring and other prevention and control measures. The key prevention and control targets are scattered children aged 3 and below, and actively promote EV71 vaccination, which is conducive to controlling and reducing the occurrence of repeated infections.

, authors=Qin CHEN, Xiao-ping ZENG, Ming-chang WANG, Xiao-qing FU, Ye-qing WU, Chun-yan LIN, authorsList=Qin CHEN, Xiao-ping ZENG, Ming-chang WANG, Xiao-qing FU, Ye-qing WU, Chun-yan LIN, authorCompany=null, correspAuthors=Chun-yan LIN, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, 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=1324071012823868416, articleId=1324071008730227700, tenantId=1146029695717560320, journalId=1227665162245664772, language=CN, title=2008—2024年海口市手足口病重复感染病例流行病学特征及影响因素分析, columnId=1228016573844226129, journalTitle=现代预防医学, columnName=疾病预防控制, runingTitle=null, highlight=null, articleAbstract=
目的

分析2008—2024年海口市手足口病重复感染病例的流行病学特征及影响因素,为制定防控策略提供参考依据。

方法

通过国家传染病监测网络收集数据,采用描述性统计、logistic回归等进行数据分析。

结果

2008—2024年海口市手足口病重复感染率为6.41%,2016年起呈现隔年波动下降趋势;重复感染流行季为4—7月和9—11月;男性重复感染率(6.90%)高于女性(5.62%);95.18%的重复感染患者为3岁及以下幼儿,<1、1~<2、2~<3、3~<4岁年龄段重复感染率分别为9.59%、8.17%、6.22%、4.95%;散居儿童重复感染率(7.32%)高于幼托儿童(4.14%)和学生(0.96%);农村重复感染率(7.29%)高于城区(6.33%)和镇区(5.50%);重复感染发病时间间隔中位数为385 d,76.75%发生在2年内;首发为重症的患者重复感染率(9.36%)高于轻症患者(6.39%)。男性、3岁及以下、散居儿童和幼托儿童(对比学生)、农村和城区(对比镇区)、低发年份、首次感染为重症是重复感染的危险因素。

结论

海口市手足口病重复感染率呈现下降趋势,但仍需持续加强健康教育、病原学监测等防控措施,以3岁及以下散居儿童作为重点防控对象,积极推广EV71疫苗接种,有利于控制和减少重复感染的发生。

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陈琴(1987—),女,本科,副主任医师,研究方向:传染病预防控制

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林春燕,E-mail:
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(In Chinese), articleTitle=Epidemiological characteristics and etiological analysis of hand-foot-mouth disease in Chenzhou City from 2012 to 2022, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1324071013062942720, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, xref=null, ext=[AuthorCompanyExt(id=1324071013075525633, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, companyId=1324071013062942720, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Haikou Center for Disease Control and Prevention, Haikou, Hainan 571100, China), AuthorCompanyExt(id=1324071013104885762, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, companyId=1324071013062942720, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=海口市疾病预防控制中心,海南 海口 571100)])], figs=[ArticleFig(id=1324071017374687273, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, language=EN, label=Fig.1, caption=Temporal distribution of single and recurrent HFMD infections in Haikou City, 2008—2024, figureFileSmall=rbume1LxEY3W+mDy7DxCqg==, figureFileBig=vNpAjOxmgd6i8S3wUabg+A==, tableContent=null), ArticleFig(id=1324071017475350570, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, language=CN, label=图1, caption=2008—2024年海口市手足口病单次感染与重复感染时间分布, figureFileSmall=rbume1LxEY3W+mDy7DxCqg==, figureFileBig=vNpAjOxmgd6i8S3wUabg+A==, tableContent=null), ArticleFig(id=1324071017894780971, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, language=EN, label=Fig.2, caption=Distribution of inter-infection intervals for recurrent HFMD in Haikou City, 2008—2024, figureFileSmall=37ddzEVtQ+s5gCmhIugWcg==, figureFileBig=RwA6rEH++lkN+QwNzBXq+Q==, tableContent=null), ArticleFig(id=1324071018012221484, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, language=CN, label=图2, caption=2008—2024年海口市手足口病重复感染发病时间间隔分布, figureFileSmall=37ddzEVtQ+s5gCmhIugWcg==, figureFileBig=RwA6rEH++lkN+QwNzBXq+Q==, tableContent=null), ArticleFig(id=1324071018087718957, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, language=EN, label=Table 1, caption=

Epidemiological characteristics of recurrent HFMD infections in Haikou City, 2008-2024

, figureFileSmall=null, figureFileBig=null, tableContent=
年度单次感染人数(n)重复感染人数(n)重复感染
(%)
重复感染1次重复感染2次重复感染3次重复感染4次重复感染5次
20082 31410640004.38
20093 220156380004.62
20106 6774321620006.08
20119 8606433879006.12
20128 70368252825007.27
201311 6041 06372430208.39
20145 90461166839509.38
201514 5201 3521 07267318.52
20167 46064189561507.91
201711 13682466842216.89
20186 81254276553507.37
201911 84158598143204.71
2020980731086006.93
20217 79338056218104.65
20221 00757746105.36
202311 82125462318002.10
20241 084214410100.18
合计122 7368 4038 4034272726.41
), ArticleFig(id=1324071018393903150, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, language=CN, label=表1, caption=

2008—2024年海口市手足口病重复感染发病情况

, figureFileSmall=null, figureFileBig=null, tableContent=
年度单次感染人数(n)重复感染人数(n)重复感染
(%)
重复感染1次重复感染2次重复感染3次重复感染4次重复感染5次
20082 31410640004.38
20093 220156380004.62
20106 6774321620006.08
20119 8606433879006.12
20128 70368252825007.27
201311 6041 06372430208.39
20145 90461166839509.38
201514 5201 3521 07267318.52
20167 46064189561507.91
201711 13682466842216.89
20186 81254276553507.37
201911 84158598143204.71
2020980731086006.93
20217 79338056218104.65
20221 00757746105.36
202311 82125462318002.10
20241 084214410100.18
合计122 7368 4038 4034272726.41
), ArticleFig(id=1324071018490372143, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, language=EN, label=Table 2, caption=

Univariate logistic regression analysis of recurrent HFMD cases

, figureFileSmall=null, figureFileBig=null, tableContent=
变量单次感染
(n)
重复感染
(n)
重复感染
(%)率
βWaldPOR(95% CI)
性别
男75 0715 5636.900.21884.013<0.0011.244(1.187~1.303)
女47 6652 8405.621
年龄(岁)
<116 2781 7269.591.706921.758<0.0015.507(4.933~6.148)
1~<239 7063 5318.171.530828.711<0.0014.619(4.162~5.126)
2~<325 3751 6826.221.236485.066<0.0013.443(3.084~3.843)
3~<420 3431 0594.950.995281.820<0.0012.704(2.407~3.037)
≥421 0344051.891
人群分类
散居儿童91 1807 2037.322.094159.802<0.0018.118(5.857~11.231)
幼托儿童26 9171 1634.141.49178.828<0.0014.440(3.195~6.170)
学生3 802370.961
其他83700.00
居住地类型
农村20 2011 5897.29%0.30241.185<0.0011.353(1.234~1.484)
城区90 7036 1266.33%0.15013.092<0.0011.162(1.071~1.260)
镇区11 8326885.50%1
病原体型别
EV71413368.02%0.3802.2420.1341.462(0.889~2.404)
其他肠道病毒853717.68%0.3342.2530.1331.396(0.903~2.159)
未知120 9508 2656.40%0.1360.5430.4611.146(0.797~1.648)
CoxA16520315.63%1
首发重症
是678709.36%0.41410.7670.0011.512(1.181~1.936)
否122 0588 3336.39%1
首发年份
低发(偶数年)40 9413 1467.14%0.17958.593<0.0011.196(1.142~1.252)
高发(奇数年)81 7955 2576.04%1
流行季
否21 9991 6036.79%0.0767.0770.0081.079(1.020~1.142)
是100 7376 8006.32%1
), ArticleFig(id=1324071018578452528, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, language=CN, label=表2, caption=

手足口病重复感染病例单因素logistic回归分析

, figureFileSmall=null, figureFileBig=null, tableContent=
变量单次感染
(n)
重复感染
(n)
重复感染
(%)率
βWaldPOR(95% CI)
性别
男75 0715 5636.900.21884.013<0.0011.244(1.187~1.303)
女47 6652 8405.621
年龄(岁)
<116 2781 7269.591.706921.758<0.0015.507(4.933~6.148)
1~<239 7063 5318.171.530828.711<0.0014.619(4.162~5.126)
2~<325 3751 6826.221.236485.066<0.0013.443(3.084~3.843)
3~<420 3431 0594.950.995281.820<0.0012.704(2.407~3.037)
≥421 0344051.891
人群分类
散居儿童91 1807 2037.322.094159.802<0.0018.118(5.857~11.231)
幼托儿童26 9171 1634.141.49178.828<0.0014.440(3.195~6.170)
学生3 802370.961
其他83700.00
居住地类型
农村20 2011 5897.29%0.30241.185<0.0011.353(1.234~1.484)
城区90 7036 1266.33%0.15013.092<0.0011.162(1.071~1.260)
镇区11 8326885.50%1
病原体型别
EV71413368.02%0.3802.2420.1341.462(0.889~2.404)
其他肠道病毒853717.68%0.3342.2530.1331.396(0.903~2.159)
未知120 9508 2656.40%0.1360.5430.4611.146(0.797~1.648)
CoxA16520315.63%1
首发重症
是678709.36%0.41410.7670.0011.512(1.181~1.936)
否122 0588 3336.39%1
首发年份
低发(偶数年)40 9413 1467.14%0.17958.593<0.0011.196(1.142~1.252)
高发(奇数年)81 7955 2576.04%1
流行季
否21 9991 6036.79%0.0767.0770.0081.079(1.020~1.142)
是100 7376 8006.32%1
), ArticleFig(id=1324071018737836081, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, language=EN, label=Table 3, caption=

Multivariate logistic regression analysis of recurrent HFMD cases

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变量参照BWaldPOR(95% CI)
性别男女0.22991.256<0.0011.257(1.199~1.317)
年龄(岁)<1≥41.605620.409<0.0014.979(4.388~5.650)
1~<21.429536.350<0.0014.173(3.698~4.710)
2~<31.122329.294<0.0013.072(2.721~3.468)
3~<40.865198.996<0.0012.376(2.107~2.679)
人群分类散居儿童学生0.84823.687<0.0012.335(1.659~3.285)
幼托儿童0.88426.218<0.0012.421(1.726~3.396)
居住类型农村镇区0.2330.047<0.0011.262(1.150~1.385)
城区0.1910.042<0.0011.211(1.116~1.314)
首发年份低发(偶数年)高发(奇数年)0.19870.557<0.0011.218(1.164~1.276)
流行季否是-0.0573.1260.0770.944(0.886~1.006)
首发重症是否0.2554.0590.0441.291(1.007~1.655)
), ArticleFig(id=1324071020520415283, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324071008730227700, language=CN, label=表3, caption=

手足口病重复感染病例多因素logistic 回归分析

, figureFileSmall=null, figureFileBig=null, tableContent=
变量参照BWaldPOR(95% CI)
性别男女0.22991.256<0.0011.257(1.199~1.317)
年龄(岁)<1≥41.605620.409<0.0014.979(4.388~5.650)
1~<21.429536.350<0.0014.173(3.698~4.710)
2~<31.122329.294<0.0013.072(2.721~3.468)
3~<40.865198.996<0.0012.376(2.107~2.679)
人群分类散居儿童学生0.84823.687<0.0012.335(1.659~3.285)
幼托儿童0.88426.218<0.0012.421(1.726~3.396)
居住类型农村镇区0.2330.047<0.0011.262(1.150~1.385)
城区0.1910.042<0.0011.211(1.116~1.314)
首发年份低发(偶数年)高发(奇数年)0.19870.557<0.0011.218(1.164~1.276)
流行季否是-0.0573.1260.0770.944(0.886~1.006)
首发重症是否0.2554.0590.0441.291(1.007~1.655)
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2008—2024年海口市手足口病重复感染病例流行病学特征及影响因素分析
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陈琴 , 曾小平 , 王明昌 , 符小晴 , 吴叶青 , 林春燕
现代预防医学 | 疾病预防控制 2025,52(24): 4577-4583
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现代预防医学 |疾病预防控制 2025 , 52 (24) : 4577 -4583
2008—2024年海口市手足口病重复感染病例流行病学特征及影响因素分析
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陈琴(1987—),女,本科,副主任医师,研究方向:传染病预防控制

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陈琴(1987—),女,本科,副主任医师,研究方向:传染病预防控制

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陈琴, 曾小平, 王明昌, 符小晴, 吴叶青, 林春燕
作者信息
  • 海口市疾病预防控制中心,海南 海口 571100
通讯作者:
林春燕,E-mail:
作者简介:

陈琴(1987—),女,本科,副主任医师,研究方向:传染病预防控制

Epidemiological characteristics and influencing factors of recurrent cases of hand-foot-and-mouth disease reinfection, Haikou City, 2008-2024
Qin CHEN, Xiao-ping ZENG, Ming-chang WANG, Xiao-qing FU, Ye-qing WU, Chun-yan LIN
Affiliations
  • Haikou Center for Disease Control and Prevention, Haikou, Hainan 571100, China
出版时间: 2025-12-25 doi: 10.20043/j.cnki.MPM.202506422
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目的

分析2008—2024年海口市手足口病重复感染病例的流行病学特征及影响因素,为制定防控策略提供参考依据。

方法

通过国家传染病监测网络收集数据,采用描述性统计、logistic回归等进行数据分析。

结果

2008—2024年海口市手足口病重复感染率为6.41%,2016年起呈现隔年波动下降趋势;重复感染流行季为4—7月和9—11月;男性重复感染率(6.90%)高于女性(5.62%);95.18%的重复感染患者为3岁及以下幼儿,<1、1~<2、2~<3、3~<4岁年龄段重复感染率分别为9.59%、8.17%、6.22%、4.95%;散居儿童重复感染率(7.32%)高于幼托儿童(4.14%)和学生(0.96%);农村重复感染率(7.29%)高于城区(6.33%)和镇区(5.50%);重复感染发病时间间隔中位数为385 d,76.75%发生在2年内;首发为重症的患者重复感染率(9.36%)高于轻症患者(6.39%)。男性、3岁及以下、散居儿童和幼托儿童(对比学生)、农村和城区(对比镇区)、低发年份、首次感染为重症是重复感染的危险因素。

结论

海口市手足口病重复感染率呈现下降趋势,但仍需持续加强健康教育、病原学监测等防控措施,以3岁及以下散居儿童作为重点防控对象,积极推广EV71疫苗接种,有利于控制和减少重复感染的发生。

手足口病  /  重复感染  /  流行病学特征  /  影响因素
Objective

To analyze the epidemiological characteristics and influencing factors of repeated infections of hand-foot-and-mouth disease in Haikou City (2008-2024), and to provide reference for formulating prevention and control strategies.

Methods

Collect data through the national notifiable disease report system, Use descriptive statistics, logistic regression, and other methods for data analysis.

Results

The recurrence rate of hand-foot-and-mouth disease in Haikou City (2008—2024) was 6.41%, and showed a fluctuating downward trend from 2016 onwards. The repeated infection epidemic season is from April to July and from September to November. The repeated infection rate in males (6.90%) is higher than that in females (5.62%). 95.18% of repeat infection patients are children aged 3 years and below, with repeat infection rates of 9.59%, 8.17%, 6.22%, and 4.95% in the age groups of <1、1-<2、2-<3 and 3-<4 years, respectively. The repeated infection rate among scattered children (7.32%) is higher than that of preschool children (4.14%) and students (0.96%). The repeated infection rate in rural areas (7.29%) is higher than that in urban areas (6.33%) and townships (5.50%). The median interval between repeated infections is 385 days, with 76.75% occurring within 2 years. The repeat infection rate of patients with severe symptoms (9.36%) is higher than that of patients with mild symptoms (6.39%). Male, 3 years old and under, scattered children and preschool children (compared with students), rural and urban areas (compared with towns), low incidence years, and severe first-time infections are risk factors for recurrent infections.

Conclusion

The repeated infection rate of hand-foot-and-mouth disease in Haikou City is showing a downward trend, but it is still necessary to continue to strengthen health education, pathogen monitoring and other prevention and control measures. The key prevention and control targets are scattered children aged 3 and below, and actively promote EV71 vaccination, which is conducive to controlling and reducing the occurrence of repeated infections.

Hand-foot-and-mouth disease  /  Reinfection  /  Epidemiological characteristics  /  Influencing factor
陈琴, 曾小平, 王明昌, 符小晴, 吴叶青, 林春燕. 2008—2024年海口市手足口病重复感染病例流行病学特征及影响因素分析. 现代预防医学, 2025 , 52 (24) : 4577 -4583 . DOI: 10.20043/j.cnki.MPM.202506422
Qin CHEN, Xiao-ping ZENG, Ming-chang WANG, Xiao-qing FU, Ye-qing WU, Chun-yan LIN. Epidemiological characteristics and influencing factors of recurrent cases of hand-foot-and-mouth disease reinfection, Haikou City, 2008-2024[J]. Modern Preventive Medicine, 2025 , 52 (24) : 4577 -4583 . DOI: 10.20043/j.cnki.MPM.202506422
手足口病(hand-foot-and-mouthdisease, HFMD)是由柯萨奇病毒(Coxsackievirus,Cox)A组4—7、9、10、16型、B组1—3、5型、埃可病毒(Echovirus,Echo)部分血清型和肠道病毒71型(Enterovirus A71,EV71)等多种肠道病毒引起的常见传染病,婴幼儿及儿童普遍易感,且不同病原型别之间缺乏交叉免疫力,同一患者可多次感染手足口病[1]。相关研究显示,手足口病给患儿家庭带来了沉重的经济负担,而多次就诊是导致高经济负担的危险因素[2]。本文通过对海口市手足口病重复感染病例开展为期17年的系统性研究,首次揭示海口地区手足口病重复感染流行病学特征及影响因素,以期为该地区手足口病防控提供参考。
通过“传染病监测系统”获取2008—2024年现住址为海口市的手足口病病例资料,同期人口数据来自“疾病预防控制综合管理系统”。
手足口病最长潜伏期为10天,大多数患者在一周内痊愈[1],住院患者平均病程为10天左右[3];轻症患者与后一次发病时间间隔>20 d视为重复感染;重症患者与后一次发病时间间隔>60 d视为重复感染[4]。
符合重复感染发病时间间隔的标准下,满足一下条件之一者:①患者姓名和性别相同,且身份证号码或现住详细地址任一项相同;②患者姓名和性别相同,且患者家长姓名、联系电话、出生日期、工作单位(所在学校或托幼机构)至少两项相同;③患者姓名为同音字或形近字,性别相同且身份证号码、现住详细地址、患者家长姓名、联系电话、出生日期、工作单位(所在学校或托幼机构)至少三项相同,如无法确定则不纳入统计。
使用Excel 2021建立数据库,应用SPSS 20.0进行统计分析,采用描述性统计方法对流行病学特征进行描述;使用季节指数描述季节特征,季节指数=该季节重复感染平均值/重复感染整体平均值;通过χ2检验分析组间率(或构成比)的比较;采用检验和Spearman相关分析评估发病趋势;采用logistic回归分析危险因素,检验水准α=0.05。
2008—2024年海口市共报告手足口病139 998例,涉及131 139人,其中单次感染122 736人,重复感染8 403人,重复感染率为6.41%。重复感染患者中,重复感染2次7 976人,重复感染3次400人、重复感染4次25人、重复感染5次2人。2008—2014年,海口市手足口病重复感染率持续上升,2015年稍有回落,2016年起呈现明显的隔年波动下降趋势()。见表1。
海口市手足口病重复感染病例1—12月季节指数分别为0.23、0.12、0.45、1.16、1.70、1.45、1.27、0.95、1.57、1.52、1.04、0.54,其中4—7月、9—11月的季节指数均大于1,提示为重复感染的流行季,其余月份的季节指数小于1,为重复感染的非流行季,总体走势与单次感染发病基本一致,呈显著正相关(Spearman相关系数分别为rs=0.938,P<0.001)。见图1。
2008—2024年海口市手足口病重复感染患者中,男女性别比为1.96:1(5 563/2 840),男性重复感染率(6.90%,5 563/80 634)高于女性(5.62%,2 840/50 505),差异有统计学意义(χ2=84.080,P<0.001);重复感染患者首次发病年龄集中在3岁及以下(占95.18%),<1、1~<2、2~<3、3~<4岁重复感染率分别为9.59%(1 726/18 004)、8.17%(3 531/43 237)、6.22%(1 682/27 057)、4.95%(1 059/21 402),重复感染率随年龄增长呈明显下降趋势(,P<0.001);散居儿童重复感染率(7.32%,7 203/98 383)高于幼托儿童(4.14%,1 163/28 080)和学生(0.96%,37/3 839),差异有统计学意义(χ2=563.343,P<0.001)。
按住址类型分,农村重复感染率最高(7.29%,1 589/21 790),其次是城区(6.33%,6 126/96 829)和镇区(5.50%,688/12 520),差异有统计学意义(χ2=46.879,P<0.001)。
发病时间间隔最短为21d,最长为4 960d(13.59y),中位数为385d(1.05y);首次感染为轻症的患者发病时间间隔最短为21d,最长为4 960d(13.59y),中位数为388d(1.06y);首次感染为重症的患者发病时间间隔最短为73d,最长为3 456d(9.47y),中位数为446d(1.22y);50.58%的病例再次感染发生在前一次感染后1年内,76.75%发生在2年内,97.70%发生在5年内。见图2。
首次感染为轻症的患者8 333人,重复感染率为6.39%,其中27人重复感染时发展为重症;首次感染为重症的患者70人,重复感染率为9.36%,其中2人重复感染时再次发展为重症;重复感染患者中无死亡病例报告。
2008—2024年期间,海口市共检出手足口病病毒2 092份,其他肠道病毒、CoxA16和EV71分别为992份、614份、486份,其中2008—2015年以EV71为主(占38.72%,328/847),2016年以后优势病原发生明显转换,2016—2024年以其他肠道病毒占据绝对优势(占56.39%,702/1 245),EV71仅占12.69%(158/1 245),其中2024年EV71仅见零星检出(占6.12%,6/98)。
重复感染患者中,检出肠道病毒且再次感染发病的有138人,其中其他肠道病毒71人、EV71和CoxA16分别为36人和31人,重复感染率分别为7.68%、8.02%和5.63%,差异无统计学意义(χ2=2.824,P=0.224)。首次感染及再次感染均有病原学结果的有6人,其中2人重复感染相同病原(CoxA16),发病时间间隔分别为351 d、457 d;2人重复感染其他肠道病毒(未具体分型),发病时间间隔分别为387 d、567 d;1人首次感染EV71,间隔778 d后再次感染其他肠道病毒;1人首次感染其他肠道病毒,间隔291 d后再次感染CoxA16。
将重复感染病例设为病例组,单次感染病例设为对照组,进行单因素logistic分析,得出性别、年龄、人群分类、居住地类型、病情严重程度、首发年份、流行季均可能对手足口病重复感染产生影响,见表2。将以上因素纳入多因素logistic回归模型分析,结果显示,男性、3岁及以下、散居儿童和幼托儿童(对比学生)、农村和城区(对比镇区)、低发年份、首次感染为重症是重复感染的危险因素。见表3。
2008—2024年海口市手足口病重复感染率为6.41%,高于陕省(2.21%)、温州市[5](2.27%)、无锡市[6](2.75%),与重庆市沙坪坝区[7](6.50%)相近,有关Meta分析显示,国内手足口病重复感染率在0.10%~12.68%之间[8],地理特征[9-10]、研究年限、样本量、重复感染判断标准等是导致差异的原因[5,11]。海口市手足口病重复感染率自2016年起呈现明显的隔年波动下降趋势,或与2016年EV71疫苗投入使用及手足口病隔年高发特征有关,海口市EV71检出率自2016年起持续下降,近年仅有零星检出,优势病原的转换或对重复感染构成一定影响,另有研究表明,接种EV71疫苗后发生手足口病二次感染的风险显著下降,或因与既往感染产生混合免疫,免疫记忆得以加强,延长了免疫保护期所致[12]。
重复感染流行季为4—7月、9—11月,时间曲线与单次感染高度吻合,呈现海口市手足口病典型的双峰型特征[13-14];重复感染患者以3岁及以下的散居儿童为主,男性重复感染率高于女性,与荆州、江西、陕西、泸州等多地研究[11,15-17]一致,与低龄幼儿免疫功能尚未完善、缺乏手卫生意识、男性幼儿活泼好动暴露机会更多等有关;地区分布上,农村重复感染率高于城区和镇区,分析与农村儿童体格生长及营养状况落后于城区儿童[18]、农村卫生条件和资源相对相差、EV71疫苗接种程度存在差异[19]等有关,而城区重复感染率高于镇区,与海口市城区人口密度大、城中村较多、流动人口密集、居民结构复杂等有关;重复感染的两次发病时间间隔中位数为385 d(1.05y),50.58%的重复感染发生在前一次感染后1年内,76.75%发生在2年内,与重庆沙坪坝、雅安等地研究结果[7,20]相似;首次感染为重症的患者重复感染率(9.36%)高于轻症患者(6.39%),与重症患者本身免疫功能较低、且预后细胞因子发生变化等有关[21-22]。
多因素logistics分析结果显示,男性、3岁及以下、散居儿童和幼托儿童(对比学生)、农村和城区(对比镇区)、低发年份、首次感染为重症是重复感染的危险因素。与既往研究结果不同的是,杨连健等[7]认为高发年份(该研究定为偶数年)是重复感染的危险因素,指出高发年份发生大量的感染儿童,相比低发年份发生重复感染的机率更大;黄洁茹等[5]认为高发年份(该研究根据实际发病情况定义高发年份)是重复感染的保护因素,但未进一步分析原因;与国内多数省份以偶数年高发的流行特点不同[23],海口市手足口病高发年份与低发年份病例数差距极大,呈现非常典型的奇数年高发的特征[15,23],本研究中低发年份是重复感染的危险因素,分析或因低发年份发病的患儿在次年遇上高发年份时,更容易由于暴露机会增加导致出现重复感染的结果,这也与超一半的患儿重复感染发生在1年内、低发年份的重复感染率(7.14%)高于高发年份(6.04%)等结果相符,本研究结合海口市实际流行特征以奇数年定义高发年份,加上样本量较大、流行特征典型,研究结果相对更有参考价值。
综上所述,海口市手足口病重复感染率高于全国平均水平,近年来虽呈下降趋势,但仍需持续做好健康教育,对3岁及以下散居儿童及其监护人普及防控知识,提醒幼儿患病后仍有多次感染发病的可能;疾控机构应加强重点人群和重点场所的防控指导、拓展病原学的分型和检测、做好疫情监测预警与应急处置,同时积极倡导EV71疫苗接种,有效控制和减少重复感染的发生。此外,不同肠道病毒亚型、EV71疫苗的接种都可能对重复感染产生影响,有待后续研究进一步探讨。

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2025年第52卷第24期
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doi: 10.20043/j.cnki.MPM.202506422
  • 接收时间:2025-06-25
  • 首发时间:2026-11-02
  • 出版时间:2025-12-25
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  • 收稿日期:2025-06-25
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    海口市疾病预防控制中心,海南 海口 571100

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