Cynomolgus monkeys (Macaca fascicularis) may not become infected with equine herpesvirus 9

Background It was suggested that Equine herpesvirus 9 (EHV-9) could be transmitted to higher non-human primates. Methods Four cynomolgus monkeys (Macaca fascicularis) were inoculated with EHV-9 by the nasal route. Results No abnormalities were observed pathologically, immunohistochemically, and genetically. Conclusions These findings indicate that cynomolgus monkeys are not susceptible to EHV-9.