1. Quality Milk Production Services, Animal Health Diagnostic Center, Cornell University, Ithaca, New York, USA
2. Institute of Biomedical Technologies, National Research Council, Segrate, Milan, Italy
3. Institute of Agricultural Biology and Biotechnology, National Research Council, Lodi, Italy
4. Department of Entomology, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York, USA
5. Departamento de Medicina Preventiva y Salud Pública, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, Mexico
6. Dipartimento di Medicina Veterinaria e Scienze Animali, Università degli Studi di Milano, Lodi, Italy
7. Laboratorio di Malattie Infettive degli Animali-MiLab, University of Milan, Lodi, Italy