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2007 年至 2016 年期间,送往比利时国家参考中心的分枝杆菌培养阳性和假阳性的数量明显增加。

Strong increase of true and false positive mycobacterial cultures sent to the National Reference Centre in Belgium, 2007 to 2016.

机构信息

Unit Bacterial Diseases Service, Infectious diseases in Humans, Sciensano, Brussels, Belgium.

European Public Health Microbiology Training Programme (EUPHEM), European Centre for Disease Prevention and Control, Stockholm, Sweden.

出版信息

Euro Surveill. 2019 Mar;24(11). doi: 10.2807/1560-7917.ES.2019.24.11.1800205.

DOI:10.2807/1560-7917.ES.2019.24.11.1800205
PMID:30892180
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6425549/
Abstract

IntroductionIn 2007, a new federal legislation in Belgium prohibited non-biosafety level 3 laboratories to process culture tubes suspected of containing mycobacteria.AimTo present mycobacterial surveillance/diagnosis data from the Belgian National Reference Centre for mycobacteria (NRC) from 2007 to 2016.MethodsThis retrospective observational study investigated the numbers of analyses at the NRC and false positive cultures (interpreted as containing mycobacteria at referring clinical laboratories, but with no mycobacterial DNA detected by PCR in the NRC). We reviewed mycobacterial species identified and assessed trends over time of proportions of nontuberculous mycobacteria (NTM) vs complex (MTBc), and false positive cultures vs NTM.ResultsFrom 2007 to 2016, analyses requests to the NRC doubled from 12.6 to 25.3 per 100,000 inhabitants. A small but significant increase occurred in NTM vs MTBc proportions, from 57.9% (587/1,014) to 60.3% (867/1,437) (p < 0.001). Although NTM infection notification is not mandatory in Belgium, we annually received up to 8.6 NTM per 100,000 inhabitants. predominated (ca 20% of NTM cultures), but culture numbers rose significantly, from 13.0% (74/587) of NTM cultures in 2007 to 21.0% (178/867) in 2016 (RR: 1.05; 95% CI: 1.03-1.07). The number of false positive cultures also increased, reaching 43.3% (1,097/2,534) of all samples in 2016.ConclusionWe recommend inclusion of NTM in sentinel programmes. The large increase of false positive cultures is hypothesised to result from processing issues prior to arrival at the NRC, highlighting the importance of sample decontamination/transport and equipment calibration in peripheral laboratories.

摘要

引言

2007 年,比利时的一项新联邦法规禁止非生物安全 3 级实验室处理疑似含有分枝杆菌的培养管。

目的

呈现 2007 年至 2016 年期间,比利时分枝杆菌国家参考中心(NRC)的分枝杆菌监测/诊断数据。

方法

这项回顾性观察研究调查了 NRC 的分析数量和假阳性培养物(在参考临床实验室中解释为含有分枝杆菌,但在 NRC 中未通过 PCR 检测到分枝杆菌 DNA)。我们回顾了鉴定的分枝杆菌物种,并评估了非结核分枝杆菌(NTM)与复杂分枝杆菌(MTBc)的比例以及假阳性培养物与 NTM 的随时间的变化趋势。

结果

2007 年至 2016 年,NRC 的分析请求数量翻了一番,从每 10 万人 12.6 次增加到 25.3 次。NTM 与 MTBc 的比例略有但显著增加,从 57.9%(587/1,014)增加到 60.3%(867/1,437)(p<0.001)。尽管在比利时,分枝杆菌感染通知并非强制性的,但我们每年收到的 NTM 通知高达每 10 万人 8.6 例。在所有 NTM 中, 占主导地位(占 NTM 培养物的约 20%),但其培养物数量显著增加,从 2007 年的 13.0%(74/587)增加到 2016 年的 21.0%(178/867)(RR:1.05;95%CI:1.03-1.07)。假阳性培养物的数量也增加了,2016 年达到所有样本的 43.3%(1,097/2,534)。

结论

我们建议将 NTM 纳入监测计划。假阳性培养物数量的大量增加可能是由于在到达 NRC 之前的处理问题所致,这突出了在周边实验室中样本消毒/运输和设备校准的重要性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aac/6425549/8cfaa91b715c/1800205-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aac/6425549/8cfaa91b715c/1800205-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aac/6425549/8cfaa91b715c/1800205-f1.jpg

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