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Monkeypox DNA levels correlate with virus infectivity in clinical samples, Israel, 2022
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View Affiliations Hide AffiliationsAdi Beth-Dinadib iibr.gov.il, Tomer Israelytomeri iibr.gov.il
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Citation style for this article: . Monkeypox DNA levels correlate with virus infectivity in clinical samples, Israel, 2022. Euro Surveill. 2022;27(35):pii=2200636. https://doi.org/10.2807/1560-7917.ES.2022.27.35.2200636 Received: 12 Aug 2022; Accepted: 01 Sept 2022
Abstract
The current monkeypox virus global spread and lack of data regarding clinical specimens’ infectivity call for examining virus infectivity, and whether this correlates with results from PCR, the available diagnostic tool. We show strong correlation between viral DNA amount in clinical specimens and virus infectivity toward BSC-1 cell line. Moreover, we define a PCR threshold value (Cq ≥ 35, ≤ 4,300 DNA copies/mL), corresponding to negative viral cultures, which may assist risk-assessment and decision-making regarding protective-measures and guidelines for patients with monkeypox.
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