Infection-Induced SARS-CoV-2 Seroprevalence among Blood Donors, Japan, 2022

Emerging infectious diseases, Journal Year: 2023, Volume and Issue: 29(9)

Published: Aug. 24, 2023

A nationwide survey of SARS-CoV-2 antinucleocapsid seroprevalence among blood donors in Japan revealed that, as November 2022, infection-induced the population was 28.6% (95% CI 27.6%-29.6%). Seroprevalence studies might complement routine surveillance and ongoing monitoring efforts to provide a more complete real-time picture COVID-19 burden.

Language: Английский

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Seroprevalence of SARS-CoV-2 antibodies in dogs and cats during the early and mid-pandemic periods in Japan

One Health, Journal Year: 2023, Volume and Issue: 17, P. 100588 - 100588

Published: June 20, 2023

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has continued to circulate in humans since its emergence 2019. While infection continues, numerous spillover events at least 32 animal species, including companion and zoo animals, have been reported. Since dogs cats are highly susceptible SARS-CoV-2 direct contact with their owners other household members, it is important know the prevalence of cats. Here, we established an ELISA detect serum antibodies against receptor-binding domain ectodomain spike nucleocapsid proteins. Using this ELISA, assessed seroprevalence 488 dog samples 355 cat that were collected during early pandemic period (between May June 2020) 312 251 mid-pandemic October 2021 January 2022). We found two (0.41%) 2020, one sample (0.28%) four (1.6%) positive for SARS-CoV-2. No these antibodies. conclude Japan low, suggesting animals not a major reservoir.

Language: Английский

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Seroprevalence of severe acute respiratory syndrome coronavirus 2 N antibodies between December 2021 and march 2023 in Japan

Epidemiology and Infection, Journal Year: 2024, Volume and Issue: 152

Published: Jan. 1, 2024

Abstract Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in 2019 China and rapidly spread worldwide, leading to a pandemic. The threat of SARS-CoV-2 is subsiding as most people have acquired sufficient antibodies through vaccination and/or infection prevent severe COVID-19. After the emergence omicron variants, seroprevalence against N protein elicited by ranged from 44.4% 80.2% countries other than Japan. Here, we assessed Japan before after appearance variants. Serosurveillance was conducted between December 2021 March 2023 In total, 7604 3354 residual serum or plasma samples were collected Tokyo metropolitan area Sapporo, respectively. We found that representative regions increased approximately 3% 23% also higher among young compared with elderly. Our findings indicate unlike countries, Japanese population has not been infected, raising possibility future epidemics

Language: Английский

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Age dependent discrepancy between SARS-CoV-2 anti-nucleoprotein antibody and anti-RBD spike protein antibody in children reflects vaccine coverage

Journal of Infection and Chemotherapy, Journal Year: 2024, Volume and Issue: 30(7), P. 646 - 650

Published: Feb. 2, 2024

Language: Английский

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Three-year seroprevalence of SARS-CoV-2 nucleocapsid protein antibody among children, parental awareness, and contributors of infection: a single-school cohort study in Chiba, Japan

Journal of Epidemiology, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Coronavirus disease 2019 (COVID-19) in children is often asymptomatic, posing challenges detecting infections. Additionally, factors contributing to infection remain poorly understood. This study aimed investigate trends anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleocapsid antibody seroprevalence, the relationship between seroprevalence and parental perception of child infection, related COVID-19 children.

Language: Английский

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