Cats caught same COVID-19 variants as humans
A new study has revealed that the dominant COVID-19 variant in domestic cats followed the same timeline of emerging variants as the human population in the UK.
Scientists from the MRC-University of Glasgow Centre for Virus Research (CRV) found that patterns of immunity to different variants in cats reflected the emergence of variants such as Alpha and Delta in humans, indicating multiple human-to-cat transmissions of SARS-CoV-2 over a prolonged period of time.
It is still not known whether some variants are more transmissible from humans to cats than others, or how likely to is that infected cats will develop symptoms.
The findings are based on residual blood samples taken from 2,309 cats across the UK from April 2020 to February 2022.
Grace Tyson, lead author of the study, said: “Our findings suggest that there has been continued human-to-cat transmissions of SARS-CoV-2. Therefore, it is important that we continue to monitor SARS-CoV-2 infections in pet cats that are in close contact with their COVID-19 positive owners, as it will be important to monitor changes in transmissibility of emerging variants in cats as well as humans.”
Margaret Hosie, professor of comparative virology at CRV, added: “Currently, our recommendation is that if cats regularly going outside, then they should still be allowed outdoor access if their owners have COVID-19. This decreases the risk of the cats becoming infected from their owners.
“Since human-to-cat transmission of SARS-CoV-2 occurs relatively frequently in COVID-19 positive households, the results of this study demonstrate the importance of monitoring coronavirus infections in pet cats that are in close contact with their positive owners, adopting a ‘one health’ strategy.”
The study, 'Rising SARS-CoV-2 Seroprevalence and Patterns of Cross-Variant Antibody Neutralization in UK Domestic Cats,' has been published in Emerging Infectious Diseases.