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  • Title: Seroprevalence of enterovirus D68 in Yamagata, Japan, between 1976 and 2019.
    Author: Itagaki T, Komabayashi K, Sasaki M, Ogawa N, Seto J, Aoki Y, Ikeda T, Matsuzaki Y, Mizuta K.
    Journal: J Med Virol; 2024 Oct; 96(10):e29947. PubMed ID: 39370858.
    Abstract:
    To clarify the epidemiology of enterovirus D68 (EV-D68), an enterovirus rarely identified in the 20th century, we performed seroepidemiological analysis against EV-D68 using sera collected in 1976, 1985, 1990, 1999, 2009, and 2019, as well as Yamagata isolate (EVD68/Yamagata.JPN/2023-89), in Yamagata, Japan. The neutralizing antibody (Ab)-positive rates for those under 20 years old were 61.0%, 82.5%, 84.3%, 46.7%, 50.5%, and 67.9%, in each year, whereas the rates for those above 20 years old were between 93.4% and 99.1%. Generally, geometric mean titers (GMTs）increased with age among children and the total GMT in each year was 25.4, 49.2, 37.2, 30.8, 29.5, and 33.9, from 1976 to 2019, respectively. The findings in this Yamagata-based study showed that the seroprevalence of EV-D68 over the last four decades has increased with age among children, as a susceptible group, and then reaches a plateau of over approximately 80% among adults. This study clearly revealed that EV-D68 was stably transmitted among children in the 20th century, when EV-D68 detection was quite rare.
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