SARS-CoV-2 IgG seroprevalence in the Okinawa Main Island and remote islands in Okinawa, Japan, 2020-2021.

IF 1.3 4区 医学 Q4 INFECTIOUS DISEASES Japanese journal of infectious diseases Pub Date : 2024-09-30 DOI:10.7883/yoken.JJID.2023.255
Yoshihiro Takayama, Yusuke Shimakawa, Yoshiaki Aizawa, Christian Butcher, Naomi Chibana, Mary Collins, Kohei Kamegai, Tae Gyun Kim, Satoshi Koyama, Ryota Matsuyama, Melissa M Matthews, Tomoari Mori, Tetsuharu Nagamoto, Masashi Narita, Ryosuke Omori, Noriko Shibata, Satoshi Shibata, Souichi Shiiki, Shunichi Takakura, Naoki Toyozato, Hiroyuki Tsuchiya, Matthias Wolf, Taro Yamamoto, Shuhei Yokoyama, Sho Yonaha, Kenji Mizumoto
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Abstract

We estimated the seroprevalence of anti-SARS-COV-2 IgG in different island groups in Okinawa. A cross-sectional sero-survey was repeated in three periods between July 2020 and February 2021. A total of 2683 serum samples were collected from six referral medical centers, each covering a separate region in Okinawa. In the main island, the seroprevalence was 0.0% (0/392, 95% CI: 0.0-0.9), 0.6% (8/1448, 0.2-1.1), and 1.4% (8/582, 0.6-2.7) at the 1st, 2nd, and 3rd sero-survey, respectively. In the remote islands, the seroprevalence was 0.0% (0/144, 95% CI: 0.0-2.5) and 1.6% (2/123, 0.2-5.8) at the 2nd and 3rd survey, respectively. The case detection ratio was 2.7 (95% CI: 1.3-5.3) in the main island and 2.8 (0.7-11.1) in the remote islands during the 3rd survey. The case detection ratio was the highest in people aged 20-29 years (8.3, 95% CI: 3.3-21.4) in the main island and in those aged 50-59 years (14.1, 2.1-92.7) in the remote islands, suggesting under-reporting of clinical cases by the surveillance system in these subgroups. A sero-survey during an emerging infectious disease epidemic can be useful for validating the reliability of the surveillance system by providing the case detection ratio.

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2020-2021 年日本冲绳本岛和冲绳偏远岛屿的 SARS-CoV-2 IgG 血清流行率。
我们估算了冲绳岛不同岛群抗 SARS-COV-2 IgG 的血清流行率。我们在 2020 年 7 月至 2021 年 2 月期间分三次重复进行了横断面血清调查。共收集了 2683 份血清样本,这些样本分别来自冲绳的六个转诊医疗中心。在本岛,第一次、第二次和第三次血清调查的血清流行率分别为 0.0%(0/392,95% CI:0.0-0.9)、0.6%(8/1448,0.2-1.1)和 1.4%(8/582,0.6-2.7)。在偏远岛屿,第二次和第三次血清调查的血清流行率分别为 0.0%(0/144,95% CI:0.0-2.5)和 1.6%(2/123,0.2-5.8)。在第三次调查中,主岛的病例检出率为 2.7(95% CI:1.3-5.3),偏远岛屿为 2.8(0.7-11.1)。病例检出率在本岛 20-29 岁人群中最高(8.3,95% CI:3.3-21.4),在偏远岛屿 50-59 岁人群中最高(14.1,2.1-92.7),这表明监测系统对这些亚群的临床病例报告不足。在新出现的传染病流行期间进行血清调查可提供病例检出率,有助于验证监测系统的可靠性。
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来源期刊
CiteScore
4.50
自引率
4.50%
发文量
172
审稿时长
2 months
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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