SARS-CoV-2 screening strategies for returning international travellers: Evaluation of a rapid antigen test approach

Autor: Emily Layer, Sebastian Hoehl, Marek Widera, Denisa Bojkova, Tim Westphal, Rene Gottschalk, Boris Boeddinghaus, Joscha Schork, Sandra Ciesek, Udo Goetsch
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: International Journal of Infectious Diseases, Vol 118, Iss , Pp 126-131 (2022)
Druh dokumentu: article
ISSN: 1201-9712
DOI: 10.1016/j.ijid.2022.02.045
Popis: Background: International travel poses the risk of importing SARS-CoV-2 infections and introducing new viral variants into the country of destination. Established measures include mandatory quarantine with the opportunity to abbreviate it with a negative rapid antigen test (RAT). Methods: A total of 1,488 returnees were tested for SARS-CoV-2 with both PCR and RAT no earlier than 5 days after arrival. We assessed the sensitivity and specificity of the RAT. Positive samples were evaluated for infectivity in vitro in a cell culture outgrowth assay. We tracked if participants who tested negative were reported positive within 2 weeks of the initial test. Results: Potential infectiousness was determined based on symptom onset analysis, resulting in a sensitivity of the antigen test of 89% in terms of infectivity. The specificity was 100%. All positive outgrowth assays were preceded by a positive RAT, indicating that all participants with proven in vitro infectivity were correctly identified. None of the negative participants tested positive during the follow-up. Conclusions: RAT no earlier than the 5th day after arrival was a reliable method for detecting infectious travellers and can be recommended as an appropriate method for managing SARS-CoV-2 travel restrictions. Compliance to the regulations and a high standard of test quality must be ensured.
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