A RI-MUHC study led by Dr. Benjamin Smith suggests appropriate testing could bring the COVID-19 quarantine period down from 14 to 7 days. Healthcare workers who developed COVID-19 after they were advised to self-isolate following a high-risk SARS-CoV-2 exposure, were all detected by day 7. This means that a simple testing strategy may allow for the early detection of healthcare workers who will develop COVID-19 after a high-risk exposure.
- Could a different testing strategy reduce healthcare workers’ isolation after unprotected exposure to a confirmed case of COVID-19? RI-MUHC News. Dec 18, 2020.
- Published Article: Evaluation of a home-based 7-day infection control strategy for healthcare workers following high-risk exposure to SARS-CoV-2: a cohort study. Benea C, Rendon L, Papenburg J, Frenette C, Imcaoudene A, McDonald EG, Nguyen QD, Rajda E, Tran E, Vameghestahbanati M, Benedetti A, Behr MA, Smith BM. Infect Control Hosp Epidemiol. 2020 Dec 16:1-11. doi: 10.1017/ice.2020.1389. Online ahead of print. PMID: 33323137
COVID-19 testing: Timing may be everything
The original post appeared November 2020:
It seems that a shorter COVID-19 quarantine period may be possible, thanks to the work of Dr. Benjamin Smith, MI4 scientist and member of the Meakins-Christie Laboratories. Dr. Smith was primarily looking to ease the burden of this virus on the healthcare system. Healthcare workers are at the greatest risk of exposure while at work and yet their presence at work is crucial to handle an ever-increasing influx of COVID-19 patients.
Dr. Smith began by questioning the duration of the isolation period after exposure, 14 days, and looked to reduce that window. He developed a study, and is using healthcare workers exposed to the virus as his test subjects. Testing them using a variety of methods at varying time intervals throughout their isolation has given positive results.
“Our study suggests that a simple infection control strategy consisting of symptom-triggered testing from day 0 to 7, followed by a standard home-based test on day 7, detects all or nearly all healthcare workers who develop COVID-19 after high-risk exposure. It’s a promising result. If these findings are confirmed as we test a larger number of people, this testing strategy could significantly shorten the self-isolation duration required for healthcare workers,”Dr. Benjamin Smith
The initial findings of his study indicate that the results of a nasopharyngeal swab and saliva test on the 7th day of quarantine will predict fairly accurately the likelihood of developing the virus in day 8-14. Continued positive results in this ongoing study will bring a great sense of relief to many. A shorter COVID-19 quarantine period will benefit more than just the intended healthcare workers. Other patients looking to access the healthcare system, travellers, society as a whole will feel a burden lifting in light of this news.
- The full article about Dr. Benjamin Smith’s study and the encouraging results can be read in the article COVID-19 testing: Timing may be everything, appearing in the November 18, 2020 edition of Health e-News. Photo credit: Owen Egan / Joni Dufour.