2024年浙江省台州市百日咳流行病学特征

Epidemiological characteristics of pertussis in Taizhou City of Zhejiang Province in 2024

  • 摘要:目的】 分析2024年浙江省台州市百日咳的流行病学特征与临床特点,为制定针对性防控措施提供科学依据。【方法】 通过中国疾病预防控制信息系统获取病例信息及人口数据,流行病学个案调查资料来自浙江疫苗临床研究与应用效果评价系统及预防接种服务信息系统。采用描述性流行病学方法分析三间分布,应用SaTScan 9.7软件进行时空聚集性扫描。【结果】 2024年台州市共报告百日咳病例3 090例,无死亡病例。报告病例数较往年显著上升,发病例数高峰集中于4月。时空扫描识别出3类集区:一类聚集区以天台县坦头镇为中心,涉及16个乡镇(街道);二类聚集区以温岭市太平街道为中心,涉及11个乡镇(街道);三类聚集区以玉环市干江镇为中心,涉及6个乡镇(街道)。三类聚集区报告病例合计占纳入扫描总病例数的31.04%。人群分布以6~10岁年龄组为主(55.02%),职业以学生占比最高(44.17%)。临床表现以咳嗽(97.58%)及夜间咳嗽加剧(52.10%)最为常见,典型症状比例较低。全程接种4剂次疫苗的病例占82.49%,其合并症发生率(10.47%)低于未接种组(20.56%)。【结论】 2024年台州市百日咳报告病例数激增,呈现明显的时空聚集性,病例以学龄儿童为主。疫苗接种可降低合并症发生风险。建议进一步加强监测敏感性,重点针对6~10岁学龄儿童等高发群体加强免疫策略的落实,并强化对<1岁未完成基础免疫婴儿及其家庭的重点防护;同时针对时空扫描识别的聚集区与春季高发季节,提前部署防控资源,阻断局部传播链。

     

    Abstract: Objective To analyze the epidemiological and clinical characteristics of pertussis in Taizhou City of Zhejiang Province in 2024, and to explore the local prevention and control strategy. Methods Case data and population data were obtained from the China Disease Prevention and Control Information System. Epidemiological case investigation data were collected from the Zhejiang Vaccine Clinical Research and Application Effectiveness Evaluation System and the Immunization Service Information System. Descriptive epidemiological methods were used to analyze the temporal, regional, and population distributions, and SaTScan 9.7 software was applied for spatiotemporal cluster scanning. Results In 2024, a total of 3 090 pertussis cases were reported in Taizhou City, with no deaths. The number of reported cases increased significantly compared with previous years, and the peak occurred in April. Spatiotemporal scanning identified three clusters: a most likely cluster centered on Tantou Town in Tiantai County, covering 16 streets/towns; a second most likely cluster centered on Taiping Subdistrict in Wenling City, covering 11 streets/towns; and a third most likely cluster centered on Ganjiang Town in Yuhuan City, covering 6 streets/towns. The three clusters together accounted for 31.04% of the total scanned cases. The majority of cases were in the 6-10 years age group (55.02%), and students accounted for the highest proportion by occupation (44.17%). The most common clinical manifestations were cough (97.58%) and aggravated nocturnal cough (52.10%), while typical symptoms were less frequent. Among the cases, 82.49% had completed the full 4-dose vaccination schedule, and their complication rate (10.47%) was lower than that of the unvaccinated group (20.56%).Conclusion The number of reported pertussis cases surged in Taizhou City in 2024, showing significant spatiotemporal clustering, with school-aged children being the high-risk group. Vaccination could reduce the risk of complications. It is recommended to further enhance surveillance sensitivity, with a focus on strengthening immunization strategies for high-risk groups such as school-aged children aged 6-10 years old, and to reinforce targeted protection for infants under 1 year old who have not completed primary vaccination, along with their families. In addition, prevention and control resources should be deployed in advance for the cluster areas identified through spatiotemporal analysis and for the spring peak season, to interrupt local transmission chains.

     

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