SARS-CoV-2 Serological Survey of Cats in China before and after the Pandemic
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LETTER
SARS-CoV-2 Serological Survey of Cats in China before and after the Pandemic Junhua Deng1 • Yuxiu Liu2 • Chunyan Sun2 • Jingjing Bai1 • Jie Sun1 • Liying Hao1 • Xiangdong Li3,4 Kegong Tian1,2
•
Received: 12 June 2020 / Accepted: 3 August 2020 Ó Wuhan Institute of Virology, CAS 2020
Dear Editor, SARS-CoV-2 or COVID-19 has become pandemic and spread to more than 200 countries with over 24 million human infected cases (WHO 2020). The origin of SARSCoV-2 remains unknown, though bat, pangolin, and snake were reported to be the potential animal reservoirs (Ji et al. 2020; Ward et al. 2020; Chen et al. 2020). Companion animals including dogs and cats were recent sporadically reported to be infected by SARS-CoV-2 with or without clinical symptoms (Li 2020a, b; Sailleau et al. 2020). Recently, both Chinese and American groups reported that cats were highly susceptible to SARS-CoV-2 after artificial inoculation and could spread the virus via respiratory droplets (Shi et al. 2020; Bosco-Lauth et al. 2020). Coincidently, Zhang et al. (2020) reported that 15 of 102 (14.7%) cats in Wuhan City during SARS-CoV-2 outbreak showed serological positive using an in-house indirect enzyme linked immunosorbent assay (ELISA) (Zhang et al. 2020). These reports raise a huge public concern as the infected cats could play a role in transmission of SARS-
Junhua Deng and Yuxiu Liu have contributed equally to this work. & Kegong Tian [email protected] & Xiangdong Li [email protected] 1
Luoyang Putai Biotechnology Co., Ltd, Luoyang 471003, China
2
National Research Center for Veterinary Medicine, Luoyang 471003, China
3
Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
4
Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
CoV-2. The high percentage of seropositivity of cats in Wuhan, the epicentre of the SARS-CoV-2 epidemic, could be due to the large number of infected human cases (more than 14 folds than that in other cities) (Table 1) where cats may have been more frequently exposed to SARS-CoV-2 patients or contaminated environment. As yet, SARS-CoV2 serological prevalence of cats in other Chinese cities remains unknown. Therefore, a serological survey including more cities with numbers of SARS-CoV-2 human cases in China will be valuable for elucidating the role of cats in transmission of the viruses and relieve public concerns. In this study, 630 cat serum samples collected before November 2019 and 423 cat serum samples collected during SARS-CoV-2 outbreak (from February 2020 to April 2020) in 20 cities in China for detecting the prevalence of SARS-CoV-2 specific antibodies. In a recent study, we conducted a survey of SARS-CoV2 in 35 different species of animals, in which 87 cats including 66 pet cats and
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