Isolation of Kyasanur Forest Disease Virus from Febrile Patient, Yunnan, China

We recently determined that Nanjianyin virus, isolated from serum of a patient in Yunnan Province, China, in 1989, is a type of Kyasanur Forest disease virus. Results of a 1987-1990 seroepidemiologic investigation in Yunnan Province had shown that residents of the Hengduan Mountain region of had been infected with Nanjianyin virus.