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A novel nairovirus associated with acute febrile illness in Hokkaido, Japan.

Abstract
The increasing burden of tick-borne orthonairovirus infections, such as Crimean-Congo hemorrhagic fever, is becoming a global concern for public health. In the present study, we identify a novel orthonairovirus, designated Yezo virus (YEZV), from two patients showing acute febrile illness with thrombocytopenia and leukopenia after tick bite in Hokkaido, Japan, in 2019 and 2020, respectively. YEZV is phylogenetically grouped with Sulina virus detected in Ixodes ricinus ticks in Romania. YEZV infection has been confirmed in seven patients from 2014-2020, four of whom were co-infected with Borrelia spp. Antibodies to YEZV are found in wild deer and raccoons, and YEZV RNAs have been detected in ticks from Hokkaido. In this work, we demonstrate that YEZV is highly likely to be the causative pathogen of febrile illness, representing the first report of an endemic infection associated with an orthonairovirus potentially transmitted by ticks in Japan.
AuthorsFumihiro Kodama, Hiroki Yamaguchi, Eunsil Park, Kango Tatemoto, Mariko Sashika, Ryo Nakao, Yurino Terauchi, Keita Mizuma, Yasuko Orba, Hiroaki Kariwa, Katsuro Hagiwara, Katsunori Okazaki, Akiko Goto, Rika Komagome, Masahiro Miyoshi, Takuya Ito, Kimiaki Yamano, Kentaro Yoshii, Chiaki Funaki, Mariko Ishizuka, Asako Shigeno, Yukari Itakura, Lesley Bell-Sakyi, Shunji Edagawa, Atsushi Nagasaka, Yoshihiro Sakoda, Hirofumi Sawa, Ken Maeda, Masayuki Saijo, Keita Matsuno
JournalNature communications (Nat Commun) Vol. 12 Issue 1 Pg. 5539 (09 20 2021) ISSN: 2041-1723 [Electronic] England
PMID34545081 (Publication Type: Case Reports, Journal Article, Research Support, Non-U.S. Gov't)
Copyright© 2021. The Author(s).
Chemical References
  • Antibodies, Viral
  • RNA, Viral
Topics
  • Adult
  • Animals
  • Antibodies, Viral (blood, immunology)
  • Fever (blood, epidemiology, virology)
  • Genome, Viral
  • Humans
  • Ixodes (virology)
  • Japan (epidemiology)
  • Leukocyte Count
  • Male
  • Middle Aged
  • Nairovirus (genetics, immunology, physiology, ultrastructure)
  • Phylogeny
  • RNA, Viral (genetics)
  • Virion (ultrastructure)

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