[1] Ctr Dis Control & Prevent, Rickettsial Zoonoses Branch, Natl Ctr Emerging & Zoonot Infect Dis, Atlanta, GA 30333 USA
[2] Los Angeles Cty Dept Publ Hlth, Vet Publ Hlth & Rabies Control Program, Los Angeles, CA USA
[3] Ctr Infect Dis, Vector Borne Dis Sect, Calif Dept Publ Hlth, Ontario, CA USA
[4] VCA McClave Anim Hosp, Reseda, CA USA