Extracted Data From: CDC Lyme Disease Surveillance and Data

This submission includes publicly available data extracted in its original form. Please reference the Related Publication listed here for source and citation information If you have questions about the underlying data stored here, please contact the Centers for Disease Control at https://www.cdc.gov/cdc-info/about-us/index.html. If you have questions or recommendations related to this metadata entry and extracted data, please contact the CAFE Data Management team at: [e-mail]. "Lyme disease has been a nationally notifiable condition in the United States since 1991. Reports of Lyme disease are routinely collected and verified by state and local health departments in accordance with their legal mandate and surveillance practices. After removal of personal identifiers, selected information on cases is shared with CDC through the National Notifiable Diseases Surveillance System (NNDSS). Policies regarding case definitions, reporting, confidentiality, and data release are determined by states and territories under the auspices of the Council of State and Territorial Epidemiologists (CSTE). Surveillance data have a number of limitations that need to be considered in the analysis, interpretation, and reporting of results. Limitations of surveillance data: 1.Under-reporting and misclassification are features common to all surveillance systems. Not every case of Lyme disease is reported to CDC, and some cases that are reported may be due to another cause. 2.Surveillance data are captured by county of residence, not county of exposure. 3.States may close their annual surveillance dataset at a different time than CDC. Thus, the final case counts published by CDC may not exactly match numbers published by each state agency for a given year. 4.Following its implementation in 1991, the national surveillance case definition for Lyme disease was modified in 1996, 2008, 2011, 2017, and again in 2022. Some of these changes impacted surveillance data and must be considered when attempting to interpret trends. Case definitions for each period are available." [Quote from https://www.cdc.gov/lyme/data-research/facts-stats/index.html]

本提交内容包含以原始形式提取的公开可用数据。如需获取数据来源与引用信息，请参阅此处列出的相关文献。若您对本数据集存储的原始数据有疑问，请联系美国疾病控制与预防中心（Centers for Disease Control，CDC），联系方式为：https://www.cdc.gov/cdc-info/about-us/index.html。若您对本元数据条目及提取数据有相关疑问或建议，请联系CAFE数据管理团队，邮箱地址为：[e-mail]。

莱姆病自1991年起便已成为美国全国性法定传染病。美国各州及地方卫生部门依据其法定职责与监测规范，定期收集并核实莱姆病的上报病例。在移除个人识别信息后，经筛选的病例相关信息会通过国家法定传染病监测系统（National Notifiable Diseases Surveillance System，NNDSS）共享至美国疾病控制与预防中心。各州与领地的病例定义、上报流程、保密措施及数据发布政策，由州与地区流行病学专家委员会（Council of State and Territorial Epidemiologists，CSTE）统筹下的各州自行制定。

监测数据存在诸多局限性，在开展结果分析、解读与报告时需予以考量。监测数据的局限性包括：
1. 漏报与错分类是所有监测系统的共性问题。并非所有莱姆病病例都会上报至CDC，部分上报病例也可能由其他病因引发。
2. 监测数据按病例常住县进行记录，而非暴露发生所在县。
3. 各州年度监测数据集的截止时间可能与CDC不一致。因此，CDC发布的最终病例计数，可能与各州机构同年度发布的统计数据不完全匹配。
4. 自1991年全国莱姆病监测病例定义实施以来，该定义分别于1996年、2008年、2011年、2017年及2022年进行了修订。其中部分修订对监测数据产生了影响，在解读趋势时必须加以考虑。各时期对应的病例定义均可获取。

[本段内容引自https://www.cdc.gov/lyme/data-research/facts-stats/index.html]