[1] South China Agr Univ, Coll Vet Med, Guangzhou 510642, Peoples R China
[2] Univ Toronto, Dept Lab Med & Pathobiol, Toronto, ON M5S 1A8, Canada
[3] Univ Toronto, Banting & Best Diabet Ctr, Toronto, ON M5S 1A8, Canada
[4] Key Lab Zoonosis Prevent & Control Guangdong Prov, Guangzhou 510642, Peoples R China