1. Department of Microbiology and Parasitology; College of Veterinary Medicine; King Faisal University; Al-Hasa Saudi Arabia
2. Department of Virology Faculty of Veterinary Medicine; Kaferelsheik University; Kaferelsheik Egypt
3. School of Public Health; The University of Hong Kong; Hong Kong China
4. Department of Clinical Studies; College of Veterinary Medicine; King Faisal University; Al-Hasa Saudi Arabia
5. Division of Virology; Department of Infectious Diseases; St. Jude Children's Research Hospital; Memphis TN USA
6. Maxwell H. Gluck Equine Research Center; Department of Veterinary Science; College of Agriculture; Food and Environment; University of Kentucky; Lexington KY USA
7. Department of Microbiology; Immunology and Molecular Genetics; College of Medicine; University of Kentucky; Lexington KY USA