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Mekata H, Yamada K, Umeki K, Yamamoto M, Ochi A, Umekita K, Kobayashi I, Hirai T, Okabayashi T. Nine-year seroepidemiological study of severe fever with thrombocytopenia syndrome virus infection in feral horses in Cape Toi, Japan. BMC Vet Res 2024; 20:190. [PMID: 38734647 PMCID: PMC11088034 DOI: 10.1186/s12917-024-04042-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 04/29/2024] [Indexed: 05/13/2024] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is a fatal zoonosis caused by ticks in East Asia. As SFTS virus (SFTSV) is maintained between wildlife and ticks, seroepidemiological studies in wildlife are important to understand the behavior of SFTSV in the environment. Miyazaki Prefecture, Japan, is an SFTS-endemic area, and approximately 100 feral horses, called Misaki horses (Equus caballus), inhabit Cape Toi in Miyazaki Prefecture. While these animals are managed in a wild-like manner, their ages are ascertainable due to individual identification. In the present study, we conducted a seroepidemiological survey of SFTSV in Misaki horses between 2015 and 2023. This study aimed to understand SFTSV infection in horses and its transmission to wildlife. A total of 707 samples from 180 feral horses were used to determine the seroprevalence of SFTSV using enzyme-linked immunosorbent assay (ELISA). Neutralization testing was performed on 118 samples. In addition, SFTS viral RNA was detected in ticks from Cape Toi and feral horses. The overall seroprevalence between 2015 and 2023 was 78.5% (555/707). The lowest seroprevalence was 55% (44/80) in 2016 and the highest was 92% (76/83) in 2018. Seroprevalence was significantly affected by age, with 11% (8/71) in those less than one year of age and 96.7% (435/450) in those four years of age and older (p < 0.0001). The concordance between ELISA and neutralization test results was 88.9% (105/118). SFTS viral RNA was not detected in ticks (n = 516) or feral horses. This study demonstrated that horses can be infected with SFTSV and that age is a significant factor in seroprevalence in wildlife. This study provides insights into SFTSV infection not only in horses but also in wildlife in SFTS-endemic areas.
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Affiliation(s)
- Hirohisa Mekata
- Division of Research & Inspection for Infectious Diseases, Center for Animal Disease Control, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki, 889-2192, Japan.
| | - Kentaro Yamada
- Division of Research & Inspection for Infectious Diseases, Center for Animal Disease Control, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki, 889-2192, Japan
- Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki, 889-2192, Japan
- Department of Microbiology, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu City, Oita, 879-5593, Japan
| | - Kazumi Umeki
- Division of Respirology Rheumatology, Infectious Diseases and Neurology, Internal Medicine, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, 5200-Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Mari Yamamoto
- Division of Research & Inspection for Infectious Diseases, Center for Animal Disease Control, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki, 889-2192, Japan
| | - Akihiro Ochi
- Equine Research Institute, Racing Association, 1400-4 Shiba, Shimotsuke, Tochigi, 329-0412, Japan
| | - Kunihiko Umekita
- Division of Research & Inspection for Infectious Diseases, Center for Animal Disease Control, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki, 889-2192, Japan
- Division of Respirology Rheumatology, Infectious Diseases and Neurology, Internal Medicine, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, 5200-Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Ikuo Kobayashi
- Division of Research & Inspection for Infectious Diseases, Center for Animal Disease Control, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki, 889-2192, Japan
- Field Science Center, Faculty of Agriculture, University of Miyazaki, 10100-1 Shimanouchi, Miyazaki, 880-0121, Japan
| | - Takuya Hirai
- Division of Research & Inspection for Infectious Diseases, Center for Animal Disease Control, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki, 889-2192, Japan
- Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki, 889-2192, Japan
| | - Tamaki Okabayashi
- Division of Research & Inspection for Infectious Diseases, Center for Animal Disease Control, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki, 889-2192, Japan
- Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki, 889-2192, Japan
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Ishijima K, Phichitraslip T, Naimon N, Ploypichai P, Kriebkajon B, Chinarak T, Sridaphan J, Kritiyakan A, Prasertsincharoen N, Jittapalapong S, Tangcham K, Rerkamnuaychoke W, Kuroda Y, Taira M, Tatemoto K, Park E, Virhuez-Mendoza M, Inoue Y, Harada M, Yamamoto T, Nishino A, Matsuu A, Maeda K. High Seroprevalence of Severe Fever with Thrombocytopenia Syndrome Virus Infection among the Dog Population in Thailand. Viruses 2023; 15:2403. [PMID: 38140644 PMCID: PMC10747823 DOI: 10.3390/v15122403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/06/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
Severe fever with thrombocytopenia syndrome (SFTS) is an emerging tick-borne zoonotic disease caused by the SFTS virus (SFTSV). In Thailand, three human cases of SFTS were reported in 2019 and 2020, but there was no report of SFTSV infection in animals. Our study revealed that at least 16.6% of dogs in Thailand were seropositive for SFTSV infection, and the SFTSV-positive dogs were found in several districts in Thailand. Additionally, more than 70% of the serum samples collected at one shelter possessed virus-neutralization antibodies against SFTSV and the near-complete genome sequences of the SFTSV were determined from one dog in the shelter. The dog SFTSV was genetically close to those from Thailand and Chinese patients and belonged to genotype J3. These results indicated that SFTSV has already spread among animals in Thailand.
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Affiliation(s)
- Keita Ishijima
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
| | - Thanmaporn Phichitraslip
- Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand; (T.P.); (N.N.); (P.P.); (B.K.); (T.C.); (J.S.); (A.K.); (N.P.); (S.J.)
| | - Nattakarn Naimon
- Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand; (T.P.); (N.N.); (P.P.); (B.K.); (T.C.); (J.S.); (A.K.); (N.P.); (S.J.)
| | - Preeyaporn Ploypichai
- Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand; (T.P.); (N.N.); (P.P.); (B.K.); (T.C.); (J.S.); (A.K.); (N.P.); (S.J.)
| | - Benyapa Kriebkajon
- Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand; (T.P.); (N.N.); (P.P.); (B.K.); (T.C.); (J.S.); (A.K.); (N.P.); (S.J.)
| | - Torntun Chinarak
- Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand; (T.P.); (N.N.); (P.P.); (B.K.); (T.C.); (J.S.); (A.K.); (N.P.); (S.J.)
| | - Jirasin Sridaphan
- Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand; (T.P.); (N.N.); (P.P.); (B.K.); (T.C.); (J.S.); (A.K.); (N.P.); (S.J.)
| | - Anamika Kritiyakan
- Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand; (T.P.); (N.N.); (P.P.); (B.K.); (T.C.); (J.S.); (A.K.); (N.P.); (S.J.)
| | - Noppadol Prasertsincharoen
- Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand; (T.P.); (N.N.); (P.P.); (B.K.); (T.C.); (J.S.); (A.K.); (N.P.); (S.J.)
| | - Sathaporn Jittapalapong
- Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand; (T.P.); (N.N.); (P.P.); (B.K.); (T.C.); (J.S.); (A.K.); (N.P.); (S.J.)
| | - Kanate Tangcham
- Office of Veterinary Public Health, Department of Health, Bangkok 10400, Thailand;
| | - Worawut Rerkamnuaychoke
- Faculty of Veterinary Medicine, Rajamangala University of Technology Tawan-ok, Chonburi 20110, Thailand;
| | - Yudai Kuroda
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
| | - Masakatsu Taira
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
| | - Kango Tatemoto
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
| | - Eunsil Park
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
| | - Milagros Virhuez-Mendoza
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
| | - Yusuke Inoue
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
- Joint Graduate School of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Michiko Harada
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
- Joint Graduate School of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Tsukasa Yamamoto
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
- Joint Graduate School of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Ayano Nishino
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
- Joint Graduate School of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
| | - Aya Matsuu
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
| | - Ken Maeda
- Department of Veterinary Science, National Institute of Infectious Diseases (NIID), Tokyo 162-8640, Japan; (K.I.); (Y.K.); (M.T.); (K.T.); (E.P.); (M.V.-M.); (Y.I.); (M.H.); (T.Y.); (A.N.); (A.M.)
- Joint Graduate School of Veterinary Medicine, Yamaguchi University, Yamaguchi 753-8515, Japan
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