SARS-CoV-2 surveillance between 2020 and 2021 of all mammalian species in two Flemish zoos (Antwerp Zoo and Planckendael Zoo)
Joffrin, L.; Cooreman, T.; Verheyen, E.; Vercammen, F.; Marien, J.; Leirs, H.; Gryseels, S.
Show abstract
The COVID-19 pandemic has led to millions of human infections and deaths worldwide. Several other mammal species are also susceptible to SARS-CoV-2, and multiple instances of transmission from humans to pets, farmed mink, wildlife and zoo animals have been recorded. We conducted a systematic surveillance of SARS-CoV-2 in all mammal species in two zoos in Belgium between September and December 2020 and July 2021 in four sessions, and a targeted surveillance of selected mammal enclosures following SARS-CoV-2 infection in hippos in December 2021. A total of 1523 faecal samples were tested for SARS-CoV-2 via real-time PCR. None of the samples tested positive for SARS-CoV-2. Additional surrogate virus neutralization tests conducted on 50 routinely collected serum samples during the same period were all negative. This study is a first to our knowledge to conduct active SARS-CoV-2 surveillance for several months in all mammal species of a zoo. We conclude that at the time of our investigation, none of the screened animals were excreting SARS-CoV-2.
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