title: Natural infection of cynomolgus monkeys with dengue virus occurs in epidemic cycles in the Philippines.
abstract: To investigate the potential role of non-human primates (NHPs) in a dengue virus (DENV) epidemic, we conducted serological and genomic studies using plasma samples collected from 100 cynomolgus monkeys (Macaca fascicularis) in an animal breeding facility in the Philippines. An ELISA revealed 21 monkeys with a positive IgM reaction and 19 positive for IgG. Five of the monkeys were positive for both IgM and IgG. Of the 21 IgM-positive samples, a neutralization assay identified seven containing DENV-specific antibodies. We amplified the viral non-structural 1 (NS1) gene in two and the envelope (E) gene in one of these seven samples by RT-PCR. Phylogenetic analyses revealed that these DENV genes belonged to the epidemic DENV-2 family, not the sylvatic DENV family. These results suggest that NHPs may serve as a reservoir of epidemic DENV; therefore, the ecology of the urban DENV infection cycle should be investigated in these animals in detail.
authors.affiliation: Laboratory of Primate Model, Experimental Research Center for Infectious Diseases, Institute for Virus Research, Kyoto University, Kyoto 606-8507, Japan.
authors.forename: Fumihiro
authors.initials: F
authors.lastname: Kato
authors.affiliation: Laboratory of Primate Model, Experimental Research Center for Infectious Diseases, Institute for Virus Research, Kyoto University, Kyoto 606-8507, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Ishida
authors.affiliation: Laboratory of Primate Model, Experimental Research Center for Infectious Diseases, Institute for Virus Research, Kyoto University, Kyoto 606-8507, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Kawagishi
authors.affiliation: Laboratory of Primate Model, Experimental Research Center for Infectious Diseases, Institute for Virus Research, Kyoto University, Kyoto 606-8507, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kobayashi
authors.affiliation: Laboratory of Primate Model, Experimental Research Center for Infectious Diseases, Institute for Virus Research, Kyoto University, Kyoto 606-8507, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Hishiki
authors.affiliation: Laboratory of Primate Model, Experimental Research Center for Infectious Diseases, Institute for Virus Research, Kyoto University, Kyoto 606-8507, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Miura
authors.affiliation: Laboratory of Primate Model, Experimental Research Center for Infectious Diseases, Institute for Virus Research, Kyoto University, Kyoto 606-8507, Japan.
authors.forename: Tatsuhiko
authors.initials: T
authors.lastname: Igarashi
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D003715:Dengue / Q000097:blood / Q000453:epidemiology / Q000662:veterinary* / Q000821:virology; D003716:Dengue Virus / Q000145:classification / Q000235:genetics / Q000276:immunology*; D058872:Epidemics / Q000662:veterinary*; D007074:Immunoglobulin G / Q000097:blood; D007075:Immunoglobulin M / Q000097:blood; D008252:Macaca fascicularis; D008969:Molecular Sequence Data; D008992:Monkey Diseases / Q000097:blood / Q000453:epidemiology* / Q000821:virology; D010679:Philippines / Q000453:epidemiology; D010802:Phylogeny
chemical_list: D000914:Antibodies, Viral; D007074:Immunoglobulin G; D007075:Immunoglobulin M