{"title":"2019 - 2024年日本手足口病监测检测到的CVA6病毒VP1编码区系统发育分析","authors":"Hiroyuki Tsukagoshi, Mami Nagashima, Kumiko Takahashi, Katsumi Mizuta, Tatsuya Ikeda, Ryo Shimada, Akira Kawase, Hiroto Shinomiya, Reiko Okamoto-Nakagawa, Komei Shirabe, Yasuo Kaburagi, Hiroyuki Ichikawa, Monami Taguchi, Sakurako Abe, Nobuhiro Saruki","doi":"10.7883/yoken.JJID.2025.039","DOIUrl":null,"url":null,"abstract":"<p><p>Hand, foot, and mouth disease (HFMD) caused by enteroviruses is common in children. Recently, coxsackievirus A6 (CVA6) has been identified as a major causative agent. In this study, we conducted a phylogenetic analysis of a part of the VP1 coding region of 194 CVA6 strains detected directly from 767 nasopharyngeal swab or stool samples of HFMD patients in Japan from 2019 to 2024. The detected CVA6 strains were classified into genotype D. Moreover, the strains detected from before 2019 to 2023 belonged to cluster (cluster 1 and 2), whereas the most of strains detected in 2024 belonged to another cluster (cluster 3). Genetic identity among all detected CVA6 strains was 89.1%-100%, and genetic identity within the cluster for each detected strain was 90.6%-100% for the before 2019 (cluster 1) strains, 92.6%-100% for the 2019-2023 (cluster 2) and 94.5%-100% for the 2024 (cluster 3) strains. Most of the strains detected in 2024 were similar to the strains detected in China in 2023, suggesting that the influx of new strains caused the 2024 outbreak in Japan. HFMD is one of the most prevalent diseases in the world and its pathogenicity and antigenicity may be altered. Surveillance of the influx of new strains from outside Japan will become increasingly important.</p>","PeriodicalId":14608,"journal":{"name":"Japanese journal of infectious diseases","volume":" ","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Phylogenetic analysis of the VP1 coding region of CVA6 detected in hand-foot-and-mouth disease during surveillance from 2019 to 2024 in Japan.\",\"authors\":\"Hiroyuki Tsukagoshi, Mami Nagashima, Kumiko Takahashi, Katsumi Mizuta, Tatsuya Ikeda, Ryo Shimada, Akira Kawase, Hiroto Shinomiya, Reiko Okamoto-Nakagawa, Komei Shirabe, Yasuo Kaburagi, Hiroyuki Ichikawa, Monami Taguchi, Sakurako Abe, Nobuhiro Saruki\",\"doi\":\"10.7883/yoken.JJID.2025.039\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Hand, foot, and mouth disease (HFMD) caused by enteroviruses is common in children. Recently, coxsackievirus A6 (CVA6) has been identified as a major causative agent. In this study, we conducted a phylogenetic analysis of a part of the VP1 coding region of 194 CVA6 strains detected directly from 767 nasopharyngeal swab or stool samples of HFMD patients in Japan from 2019 to 2024. The detected CVA6 strains were classified into genotype D. Moreover, the strains detected from before 2019 to 2023 belonged to cluster (cluster 1 and 2), whereas the most of strains detected in 2024 belonged to another cluster (cluster 3). Genetic identity among all detected CVA6 strains was 89.1%-100%, and genetic identity within the cluster for each detected strain was 90.6%-100% for the before 2019 (cluster 1) strains, 92.6%-100% for the 2019-2023 (cluster 2) and 94.5%-100% for the 2024 (cluster 3) strains. Most of the strains detected in 2024 were similar to the strains detected in China in 2023, suggesting that the influx of new strains caused the 2024 outbreak in Japan. HFMD is one of the most prevalent diseases in the world and its pathogenicity and antigenicity may be altered. Surveillance of the influx of new strains from outside Japan will become increasingly important.</p>\",\"PeriodicalId\":14608,\"journal\":{\"name\":\"Japanese journal of infectious diseases\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2025-07-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Japanese journal of infectious diseases\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.7883/yoken.JJID.2025.039\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"INFECTIOUS DISEASES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Japanese journal of infectious diseases","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.7883/yoken.JJID.2025.039","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"INFECTIOUS DISEASES","Score":null,"Total":0}
Phylogenetic analysis of the VP1 coding region of CVA6 detected in hand-foot-and-mouth disease during surveillance from 2019 to 2024 in Japan.
Hand, foot, and mouth disease (HFMD) caused by enteroviruses is common in children. Recently, coxsackievirus A6 (CVA6) has been identified as a major causative agent. In this study, we conducted a phylogenetic analysis of a part of the VP1 coding region of 194 CVA6 strains detected directly from 767 nasopharyngeal swab or stool samples of HFMD patients in Japan from 2019 to 2024. The detected CVA6 strains were classified into genotype D. Moreover, the strains detected from before 2019 to 2023 belonged to cluster (cluster 1 and 2), whereas the most of strains detected in 2024 belonged to another cluster (cluster 3). Genetic identity among all detected CVA6 strains was 89.1%-100%, and genetic identity within the cluster for each detected strain was 90.6%-100% for the before 2019 (cluster 1) strains, 92.6%-100% for the 2019-2023 (cluster 2) and 94.5%-100% for the 2024 (cluster 3) strains. Most of the strains detected in 2024 were similar to the strains detected in China in 2023, suggesting that the influx of new strains caused the 2024 outbreak in Japan. HFMD is one of the most prevalent diseases in the world and its pathogenicity and antigenicity may be altered. Surveillance of the influx of new strains from outside Japan will become increasingly important.
期刊介绍：
Japanese Journal of Infectious Diseases (JJID), an official bimonthly publication of National Institute of Infectious Diseases, Japan, publishes papers dealing with basic research on infectious diseases relevant to humans in the fields of bacteriology, virology, mycology, parasitology, medical entomology, vaccinology, and toxinology. Pathology, immunology, biochemistry, and blood safety related to microbial pathogens are among the fields covered. Sections include: original papers, short communications, epidemiological reports, methods, laboratory and epidemiology communications, letters to the editor, and reviews.
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