title: Isolation of myxoviruses from migratory waterfowls in San-in district, western Japan in winters of 1997-2000.
abstract: Between November 1997 and February 2000, winter migratory waterfowls of several species staying in San-in district, western Japan were surveyed for influenza A virus and paramyxovirus at four stations. A total of 18 influenza A viruses was isolated from 1,404 fecal samples of whistling swans, pintails, mallards, and white-fronted geese. Five different hemagglutinins and eight neuraminidases were identified in the viruses isolated, in 11 different combinations, including H7N8 related to a subtype of a highly pathogenic chicken virus. In 2000, five lentogenic (non-pathogenic) Newcastle disease viruses were also isolated from white-fronted geese. These results suggested that possible precursor viruses for highly pathogenic avian myxoviruses are still brought into Japan by migratory waterfowls. The results also support the contention that continued surveillance of wild waterfowl population should be an integral part of control policies for these serious poultry diseases.
authors.affiliation: Department of Veterinary Public Health, Faculty of Agriculture, Tottori University, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Shengqing
authors.forename: Kyoko
authors.initials: K
authors.lastname: Shinya
authors.forename: Koichi
authors.initials: K
authors.lastname: Otsuki
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ito
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Ito
mesh_terms: D000818:Animals; D000835:Animals, Wild; D001717:Birds / Q000821:virology*; D005243:Feces / Q000821:virology; D007564:Japan; D009975:Orthomyxoviridae / Q000145:classification / Q000302:isolation & purification* / Q000472:pathogenicity; D012621:Seasons; D013997:Time Factors; D014774:Virulence