Objective: The aim of this study was to compare the annual trends in the reported number of Japanese HIV/AIDS cases, and the distribution of sex, age and route of infection. The increasing trend of reported AIDS cases at the onset of the Japan epidemic was also compared with those of other industrialized countries.
Materials and Methods: HIV/AIDS surveillance data through December 2001 were utilized. As for the comparison of increasing trends at the onset of the epidemic, the Epidemiological Facts Sheets organized by the UNAIDS/WHO (United Nations Programme on AIDS/World Health Organization) were used. Nine industrialized countries, the USA, EU (European Union) (51 countries of the WHO European Region), Canada, Australia, UK, Germany, Italy, Spain, and France were selected for comparisons.
Results: Comparisons of Japanese HIV/AIDS with other industrialized countries revealed that the annual trend in reported cases was still increasing. The proportion of people with HIV aged 40 or above was high, and the proportion of males with HIV infected through heterosexual contact was extremely high. The increasing trend in reported AIDS cases at the onset of the Japan epidemic was extremely slow compared to that in other countries. In particular, there were differences in the number of cases infected through MSM (men who have sex with men), including bisexual contact, and or IDU (injecting drug use).
Conclusion: The epidemiological characteristics of HIV/AIDS in Japan, such as annual trends, and the distribution of sex, age and route of infection were revealed by comparisons with the surveillance data from nine other countries.
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