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Volume 29, Number 9—September 2023
Dispatch

Prevalence of Asymptomatic Mpox among Men Who Have Sex with Men, Japan, January–March 2023

Daisuke Mizushima1Comments to Author , Yui Shintani1, Misao Takano, Daisuke Shiojiri, Naokatsu Ando, Takahiro Aoki, Koji Watanabe, Takato Nakamoto, Hiroyuki Gatanaga, and Shinichi Oka
Author affiliations: National Center for Global Health and Medicine, Tokyo, Japan (D. Mizushima, Y. Shintani, M. Takano, D. Shiojiri, N. Ando, T. Aoki, K. Watanabe, T. Nakamoto, H. Gatanaga, S. Oka); Personal Health Clinic, Tokyo (D. Shiojiri); Kumamoto University, Kumamoto, Japan (H. Gatanaga, S. Oka)

Main Article

Figure 1

Flowchart of participant selection in a study of prevalence of asymptomatic mpox among men who have sex with men, Japan, January–March 2023. Of 1,348 eligible participants, 2 were excluded because of suggestive mpox symptoms. Of the remaining 1,346, a total of 5 tested positive for mpox via reverse transcription PCR; 4 of those who initially tested negative later had mpox symptoms develop. Ultimately, 6 cases were categorized as symptomatic monkeypox virus infections and 3 as asymptomatic. A total of 1,337 participants tested negative and did not exhibit any symptoms during the study period.

Figure 1. Flowchart of participant selection in a study of prevalence of asymptomatic mpox among men who have sex with men, Japan, January–March 2023. Of 1,348 eligible participants, 2 were excluded because of suggestive mpox symptoms. Of the remaining 1,346, a total of 5 tested positive for mpox via reverse transcription PCR; 4 of those who initially tested negative later had mpox symptoms develop. Ultimately, 6 cases were categorized as symptomatic monkeypox virus infections and 3 as asymptomatic. A total of 1,337 participants tested negative and did not exhibit any symptoms during the study period.

Main Article

1These authors contributed equally to this article.

Page created: July 21, 2023
Page updated: August 20, 2023
Page reviewed: August 20, 2023
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