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Detection of SARS-CoV-2 RNA in a Zoo-Kept Red Fox (). | LitMetric

AI Article Synopsis

  • A red fox in a Swiss zoo tested positive for SARS-CoV-2 RNA, marking the first report of infection in this species.
  • The positive sample was collected alongside tests for canine distemper, showing specific Ct values for SARS-CoV-2 detection.
  • The study is part of ongoing research on SARS-CoV-2 in various animal species, with no other animals in the project testing positive, and the source of infection in the fox remains unknown.

Article Abstract

Many different animal species are susceptible to SARS-CoV-2, including a few Canidae (domestic dog and raccoon dog). So far, only experimental evidence is available concerning SARS-CoV-2 infections in red foxes (). This is the first report of SARS-CoV-2 RNA detection in a sample from a red fox. The RT-qPCR-positive fox was zoo-kept together with another fox and two bears in the Swiss Canton of Zurich. Combined material from a conjunctival and nasal swab collected for canine distemper virus diagnostics tested positive for SARS-CoV-2 RNA with Ct values of 36.9 (E gene assay) and 35.7 (RdRp gene assay). The sample was analysed for SARS-CoV-2 within a research project testing residual routine diagnostic samples from different animal species submitted between spring 2020 and December 2022 to improve knowledge on SARS-CoV-2 infections within different animal species and investigate their potential role in a One Health context. Within this project, 246 samples from 153 different animals from Swiss zoos and other wild animal species all tested SARS-CoV-2 RT-qPCR and/or serologically negative so far, except for the reported fox. The source of SARS-CoV-2 in the fox is unknown. The fox disappeared within the naturally structured enclosure, and the cadaver was not found. No further control measures were undertaken.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11054100PMC
http://dx.doi.org/10.3390/v16040521DOI Listing

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