[1] Oklahoma State Univ, Dept Vet Pathobiol, Ctr Vet Hlth Sci, Stillwater, OK 74078 USA
[2] CSIC UCLM JCCM, Inst Invest Recursos Cineget IREC, Ciudad Real 13005, Spain
[3] Univ Utrecht, Fac Vet Med, UCTD, Dept Immunol & Infect Dis, NL-3584 CL Utrecht, Netherlands
[4] Univ Sao Paulo, Dept Parasitol, Inst Ciencias Biomed, BR-05508900 Sao Paulo, Brazil
[5] Univ Pretoria, Fac Vet Sci, Dept Vet Trop Dis, ZA-0110 Onderstepoort, South Africa
[6] Univ Autonoma Tamaulipas, Fac Med Vet & Zootecn, Cd Victoria 87000, Tamaulipas, Mexico
[7] Inst Nacl Tecnol Agropecuaria, Estac Expt Agropecuaria Rafaela, RA-2300 Rafaela, Santa Fe, Argentina