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2分鐘看懂NEJM:不同抗體狀態(tài)醫(yī)護(hù)人員的SARS-CoV-2感染率

 醫(yī)學(xué)abeycd 2021-02-13

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不同抗體狀態(tài)醫(yī)護(hù)人員的SARS-CoV-2感染率

Incidence of SARS-CoV-2 Infection in Health Care Workers by Antibody Status

2021年2月11日

朗讀者:Dr. Stephen Morrissey, NEJM執(zhí)行主編


SARS-CoV-2感染可誘導(dǎo)產(chǎn)生免疫應(yīng)答;但既往感染者可在多大程度上免于二次感染尚不確定。了解感染后的免疫力是否存在以及持續(xù)多長(zhǎng)時(shí)間對(duì)于我們抗擊SARS-CoV-2大流行具有重要意義。短視頻中總結(jié)了新的研究發(fā)現(xiàn)。


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NEJM醫(yī)學(xué)前沿不同抗體狀態(tài)醫(yī)護(hù)人員的SARS-CoV-2感染率小程序

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醫(yī)護(hù)人員的SARS-CoV-2抗體狀態(tài)和感染率

Antibody Status and Incidence of SARS-CoV-2 Infection in Health Care Workers

摘 要

背景

SARS-CoV-2抗體陽(yáng)性與之后的再次感染風(fēng)險(xiǎn)之間的關(guān)系尚不明確。

Background
The relationship between the presence of antibodies to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and the risk of subsequent reinfection remains unclear.

方法

此項(xiàng)研究在參與英國(guó)牛津大學(xué)醫(yī)院無(wú)癥狀和有癥狀工作人員檢測(cè)的血清反應(yīng)陽(yáng)性的和血清反應(yīng)陰性醫(yī)護(hù)人員中評(píng)估了通過(guò)聚合酶鏈反應(yīng)(PCR)確診的SARS-CoV-2感染率?;€抗體狀態(tài)通過(guò)抗刺突蛋白(主要分析)和抗核殼IgG檢測(cè)法確定;本研究對(duì)醫(yī)護(hù)人員進(jìn)行了長(zhǎng)達(dá)31周隨訪。針對(duì)年齡、參與者報(bào)告的性別和隨時(shí)間推移的發(fā)生率變化進(jìn)行校正后,我們估算了不同抗體狀態(tài)下,PCR陽(yáng)性檢測(cè)結(jié)果和新發(fā)有癥狀感染的相對(duì)發(fā)生率。

Methods
We investigated the incidence of SARS-CoV-2 infection confirmed by polymerase chain reaction (PCR) in seropositive and seronegative health care workers attending testing of asymptomatic and symptomatic staff at Oxford University Hospitals in the United Kingdom. Baseline antibody status was determined by anti-spike (primary analysis) and anti-nucleocapsid IgG assays, and staff members were followed for up to 31 weeks. We estimated the relative incidence of PCR-positive test results and new symptomatic infection according to antibody status, adjusting for age, participant-reported gender, and changes in incidence over time.

結(jié)果

共計(jì)12,541名醫(yī)護(hù)人員參與研究并接受了抗刺突蛋白IgG測(cè)定;11,364名在抗體結(jié)果呈陽(yáng)性后接受了隨訪,1265名在抗體結(jié)果呈陽(yáng)性后接受了隨訪,包括在隨訪期間血清轉(zhuǎn)陽(yáng)的88人。223名抗刺突蛋白血清反應(yīng)陰性的醫(yī)護(hù)人員的PCR檢測(cè)結(jié)果呈陽(yáng)性(1.09例/10,000風(fēng)險(xiǎn)日),100名是在篩查期間無(wú)癥狀的情況下發(fā)現(xiàn),123名是在有癥狀的情況下發(fā)現(xiàn);2名抗刺突蛋白血清反應(yīng)陽(yáng)性的醫(yī)護(hù)人員的PCR檢測(cè)結(jié)果呈陽(yáng)性(0.13例/10,000風(fēng)險(xiǎn)日),而且這兩名醫(yī)護(hù)人員在檢測(cè)時(shí)均無(wú)癥狀(校正后的發(fā)生率比,0.11;95%置信區(qū)間,0.03~0.44;P=0.002)??勾掏坏鞍卓贵w陽(yáng)性的醫(yī)護(hù)人員均未發(fā)生有癥狀的感染。不論是單獨(dú)使用抗核殼IgG檢測(cè)法確定基線狀態(tài),還是結(jié)合使用抗核殼IgG檢測(cè)法與抗刺突蛋白IgG檢測(cè)法確定基線狀態(tài),我們獲得的發(fā)生率比均相似。

Result

A total of 12,541 health care workers participated and had anti-spike IgG measured; 11,364 were followed up after negative antibody results and 1265 after positive results, including 88 in whom seroconversion occurred during follow-up. A total of 223 anti-spike–seronegative health care workers had a positive PCR test (1.09 per 10,000 days at risk), 100 during screening while they were asymptomatic and 123 while symptomatic, whereas 2 anti-spike–seropositive health care workers had a positive PCR test (0.13 per 10,000 days at risk), and both workers were asymptomatic when tested (adjusted incidence rate ratio, 0.11; 95% confidence interval, 0.03 to 0.44; P=0.002). There were no symptomatic infections in workers with anti-spike antibodies. Rate ratios were similar when the anti-nucleocapsid IgG assay was used alone or in combination with the anti-spike IgG assay to determine baseline status.

結(jié)論

抗刺突蛋白或抗核殼IgG抗體陽(yáng)性與之后6個(gè)月期間SARS-CoV-2的再次感染風(fēng)險(xiǎn)顯著降低相關(guān)。(由英國(guó)保健及社會(huì)服務(wù)署[U.K. Government Department of Health and Social Care]等資助。)

Conclusions

The presence of anti-spike or anti-nucleocapsid IgG antibodies was associated with a substantially reduced risk of SARS-CoV-2 reinfection in the ensuing 6 months. (Funded by the U.K. Government Department of Health and Social Care and others.)

Sheila F. Lumley, Denise O’Donnell, Nicole E. Stoesser, et al. Antibody Status and Incidence of SARS-CoV-2 Infection in Health Care Workers. DOI: 10.1056/NEJMoa2034545

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