State, Tribal, Local, and Territorial Support Task Force, COVID-19 Emergency Response, Centers for Disease Control and Prevention, Atlanta, GA, USA.
G2S Corporation, San Antonio, TX, USA.
J Hosp Infect. 2023 Apr;134:7-10. doi: 10.1016/j.jhin.2022.12.022. Epub 2023 Jan 22.
The B.1.167.2 (Delta) variant quickly became the predominant circulating SARS-CoV-2 strain in the USA during summer 2021. Missouri identified a high number of outbreaks in long-term care facilities (LTCFs) across the state with low vaccination rates among LTCF staff members and poor adherence to mitigation measures within local communities.
To describe COVID-19 outbreaks that occurred in Missouri LTCFs impacting staff and residents during the surge of the Delta variant.
Outbreaks of COVID-19 in 178 LTCFs were identified by the Missouri Department of Health and Senior Services. Case data from LTCFs with the highest burden of disease were analysed to assess disease transmission, vaccination status, and outcomes among residents and staff. Additional investigational measures included onsite visits to facilities with recent COVID-19 outbreaks in communities with substantial transmission to assess mitigation measures.
During April 22 to July 29, 2021, 159 COVID-19 cases among 72 staff members and 87 residents were identified in 10 LTCFs. More than 74.7% of resident cases were vaccinated compared to 23.6% of staff cases. Vaccinated residents had a lower proportion of hospitalizations and deaths reported compared to unvaccinated residents. Data analysis and contact-tracing efforts from a sample of the facilities suggest that staff members were likely a major factor in introducing SARS-CoV-2 virus into the facilities. Adherence to COVID-19 mitigation measures varied at the visited facilities.
Data showed that vaccination rates varied between staff cases and resident cases in facilities with high-burden outbreaks. Differences were identified in mitigation practices in at least two facilities.
2021 年夏季，B.1.167.2（Delta）变体迅速成为美国主要流行的 SARS-CoV-2 株。密苏里州在全州范围内的长期护理机构（LTCF）中发现了大量暴发疫情，这些机构的工作人员疫苗接种率低，当地社区的缓解措施执行不力。
描述 2021 年 Delta 变体激增期间在密苏里州 LTCF 中发生的影响工作人员和居民的 COVID-19 暴发。
密苏里州卫生和高级服务部确定了 178 家 LTCF 中的 COVID-19 暴发。对疾病负担最重的 LTCF 的病例数据进行分析，以评估居民和工作人员中的疾病传播、疫苗接种状况和结果。其他调查措施包括对疫情暴发期间社区内最近有 COVID-19 暴发且传播率高的设施进行现场访问，以评估缓解措施。
2021 年 4 月 22 日至 7 月 29 日，在 10 家 LTCF 中，有 72 名工作人员和 87 名居民的 159 例 COVID-19 病例得到确认。接种疫苗的居民病例中有超过 74.7%，而工作人员病例中仅有 23.6%接种了疫苗。与未接种疫苗的居民相比，接种疫苗的居民报告的住院和死亡比例较低。对部分设施进行数据分析和接触者追踪发现，工作人员很可能是将 SARS-CoV-2 病毒带入设施的主要因素。到访设施的 COVID-19 缓解措施执行情况各不相同。
数据显示，高负担暴发的设施中，工作人员病例和居民病例的疫苗接种率存在差异。至少有两家设施在缓解措施上存在差异。
