[1] CSIRO Livestock Ind, Australian Anim Hlth Lab, Geelong, Vic 3220, Australia
[2] Univ New Mexico, Dept Biol, Ctr Evolutionary & Theoret Immunol, Albuquerque, NM 87131 USA
[3] Chinese Acad Sci, Wuhan Inst Virol, State Key Lab Virol, Wuhan, Peoples R China
[4] Australian Biosecur Cooperat Res Ctr Emerging Inf, Geelong, Vic 3220, Australia